| atmospheric ions and germination of uredospores of puccinia striiformis. | atmospheric ions, identified by mobility characteristics, were associated with germination of lyophilized uredospores of puccinia striiformis west. at bozeman montana. ions of intermediate size were highest in concentration, and percentage germination of spores was lowest during periods conducive to air pollution. in duplicate experiments at an isolated site near barrow. alaska, essentially all atmospheric ions were small ions and the fungus spores were consistently germinated near maximum. | 1967 | 5610112 |
| disease, frequency-dependent selection, and genetic polymorphisms: experiments with stripe rust and wheat. | pathogens have the potential to maintain genetic polymorphisms by creating frequency-dependent selection on their host. this can occur when a rare host genotype is less likely to be attacked by a pathogen (frequency-dependent disease attack) and has higher fitness at low frequency (negative frequency-dependent selection). in this study, we used wheat genotypes that were susceptible to different races of the pathogen puccinia striiformis to test whether disease created frequency-selection on its ... | 2000 | 10937217 |
| effects of competition on resistance gene polymorphism in a plant/pathogen system. | puccinia striiformis, a fungal pathogen, has been shown to cause direct, negative frequency-dependent selection on its host, wheat (triticum aestivum). this disease-induced frequency-dependent selection was not sufficient to maintain polymorphism for resistance genes in the host populations. the present study examines whether interactions between disease and competition could impact upon the maintenance of genetic polymorphism in a highly self-pollinated species such as wheat, where strong assoc ... | 2000 | 11122417 |
| development of resistance gene analog polymorphism markers for the yr9 gene resistance to wheat stripe rust. | the yr9 gene, which confers resistance to stripe rust caused by puccinia striiformis f.sp. tritici (p. s. tritici) and originated from rye, is present in many wheat cultivars. to develop molecular markers for yr9, a yr9 near-isogenic line, near-isogenic lines with nine other yr genes, and the recurrent wheat parent 'avocet susceptible' were evaluated for resistance in the seedling stage to north american p s. tritici races under controlled temperature in the greenhouse. the resistance gene analo ... | 2001 | 11550883 |
| [chromosomal location and molecular marker of resistance gene to puccinia striiformis west. in leymus mollis trin. hara]. | the hybrid wheat line, 93784 is a stable line selected from progenies of leymus molli trin. hara x common wheat, which shows a very high level of resistance to yellow rust. the results of gish using genomic dna of leymus mollis as probe indicated that the 93784 was a wheat-leymus mollis small segment translocation line, and the translocated alien chromosome fragment were located on a pair of short arm terminals of what chromosomes. using this translocation line, we established f2 segregation pop ... | 2001 | 11582747 |
| barley yellow rust in north america. | yellow rust of barley is an invasive disease that was found in the past 10 years in north america. the causal agent, puccinia striiformis f. sp. hordei, was introduced into colombia, south america, from europe in 1975. it spread to all major barley-producing areas in south america by 1982. in 1988 it was found in mexico and in 1991 in texas. since then it has been found in all major barley-producing areas of the american west. originally described as race (r) 24, barley yellow rust in north amer ... | 2001 | 11701870 |
| induced chitinase activity in resistant wheat leaves inoculated with an incompatible race of puccinia striiformis f. sp. tritici, the causal agent of yellow rust disease. | chitinase specific activity was measured spectrophotometrically in wheat leaf tissues during the compatible and incompatible interactions with puccinia striiformis f. sp. tritici, the causal agent of yellow rust disease. the wheat cultivar, federation* 4/kavkaz, was inoculated with virulent (134e134a+) or avirulent (4eoa+) races of p. striiformis f. sp. tritici in the first leaf stage. the results showed that chitinase activity pattern was similar in both compatible and incompatible interactions ... | 2002 | 12171444 |
| genetic variability in puccinia striiformis f. sp. tritici populations sampled on a local scale during natural epidemics. | this study investigated genetic polymorphism on a local scale in puccinia striiformis f. sp. tritici populations during natural epidemics, in four fields located in northern france and sampled in 1998 or 1999. two hundred and forty-seven isolates were analyzed for their amplified fragment length polymorphism (aflp) pattern through four primer combinations, and 194 of them were also tested for their virulence factors. only one or two pathotypes were found in each field, and all isolates had virul ... | 2002 | 12450838 |
| resistance gene-analog polymorphism markers co-segregating with the yr5 gene for resistance to wheat stripe rust. | the yr5 gene confers resistance to all races of the stripe rust pathogen ( puccinia striiformis f. sp. tritici) of wheat in the united states. to develop molecular markers for yr5, a bc(7):f(3) population was developed by backcrossing the yr5 donor ' triticum spelta album' (tsa) with the recurrent parent 'avocet susceptible' (avs). seedlings of the yr5 near-isogenic lines (avs/6* yr5), avs, tsa, and the bc(7):f(3) lines were tested with north american races of p. striiformis f. sp. tritici under ... | 2003 | 12595992 |
| understanding puccinia striiformis west. epidemics on winter wheat. | yellow rust epidemics, caused by puccinia striiformis west., often arise in wheat field as infection focus of a few decimetres of diameter, including some sporulating lesions on a few plants. under appropriate environmental conditions such as high relative humidity and temperatures between 2 and 20 degrees c, those initial foci may grow rapidly and initiate new foci elsewhere in the field. the first aim of this work was to better understand the effects of weather parameters on the focus growth. ... | 2002 | 12701429 |
| yr32 for resistance to stripe (yellow) rust present in the wheat cultivar carstens v. | stripe or yellow rust of wheat, caused by puccinia striiformis f. sp. tritici, is an important disease in many wheat-growing regions of the world. a number of major genes providing resistance to stripe rust have been used in breeding, including one gene that is present in the differential tester carstens v. the objective of this study was to locate and map a stripe rust resistance gene transferred from carstens v to avocet s and to use molecular tools to locate a number of genes segregating in t ... | 2004 | 14523516 |
| the genetics of non-host disease resistance in wheat to barley yellow rust. | non-host resistance is investigated as a potential source of durable resistance. however, the genetics of non-host resistance between closely related plant species and their corresponding pathogens would indicate that in these interactions, non-host resistance primarily involves major genes that operate on a gene-for-gene principal similar to that seen in host resistance. wheat is a non-host of the barley-attacking form of the fungus responsible for yellow rust, i.e. puccinia striiformis f. sp. ... | 2004 | 15138688 |
| the ipm wheat model--results of a three-year study in north rhine-westphalia, lower saxony and schleswig-holstein. | under the primary utilisation of phytosanitary production factors such as selection of variety, crop rotation and n fertilisation according to plant requirements, the ipm wheat model comprises the elements diagnosis (qualitative = type of pathogen, quantitative = disease severity), scientifically grounded treatment thresholds which, as critical values in pathogen development, can be applied to define the optimum time of fungicide application, and pathogen-specific effective fungicides and applic ... | 2003 | 15151283 |
| mutations in wheat exhibiting growth-stage-specific resistance to biotrophic fungal pathogens. | two mutants were isolated in wheat that showed enhanced resistance towards puccinia striiformis f. sp. tritici, the fungal causal agent of yellow rust. the altered phenotype of i3-48 is due to a minimum of two mutation events, each showing a partial, additive effect, with one mutation segregating with a deletion on the long arm of chromosome 4d. in the case of i3-54, the enhanced resistance is due to a single, dominant mutation. in both mutants, the expression of the enhanced resistance is growt ... | 2004 | 15553249 |
| [inheritance of stripe rust resistance in the native wheat variety dazicao from china]. | dazicao, a native wheat variety with stripe rust resistance from henan, china, was crossed with susceptible cultivar mingxian 169 as the female parent. the f(1) progeny was selfed to produce f(2) progeny and backcrossed with mingxian 169 to produce bc(1) progeny. in air-conditioned greenhouse,seedlings of the f(1), f(2), bc1 progenies and their parents were inoculated with the prevalent races cy28 and cy32 of puccinia striiformis respectively. the phenotypes of the f(1), f(2) and bc(1) plants we ... | 2003 | 15639877 |
| inheritance and qtl analysis of durable resistance to stripe and leaf rusts in an australian cultivar, triticum aestivum 'cook'. | an f4-derived f6 recombinant inbred line population (n = 148) of a cross between the durable stripe (yellow) rust (caused by puccinia striiformis) and leaf (brown) rust (caused by puccinia triticina) resistant cultivar, triticum aestivum 'cook', and susceptible genotype avocet-yra was phenotyped at several locations in canada and mexico under artificial epidemics of leaf or stripe rusts and genotyped using amplified fragment length polymorphism (aflp) and microsatellite markers. durable adult pl ... | 2005 | 15729401 |
| genetic analysis of durable resistance to yellow rust in bread wheat. | yellow rust, caused by puccinia striiformis, is one of the most damaging diseases affecting bread wheat in temperate regions. although resistance to yellow rust is frequently overcome by new virulent races, a durable form of resistance in the french bread wheat camp remy (cr) has remained effective since its introduction in 1980. we used 217 f7 recombinant inbred lines (rils) derived from the cross between cr and the susceptible cultivar recital to identify and map quantitative trait loci (qtls) ... | 2005 | 15841362 |
| genetic evidence of local adaptation of wheat yellow rust (puccinia striiformis f. sp. tritici) within france. | puccinia striiformis f. sp. tritici (pst), a clonal basidiomycete causing yellow rust disease on wheat, has a long record of 'overcoming' cultivar resistance introduced by breeders. despite the long dispersal capacity of its spores, the french population of pst presents a strong geographical structure, with the presence of a specific pathotype (array of avirulence genes) at high frequencies in the south of france. the genetic diversity underlying this differentiation was analysed by microsatelli ... | 2005 | 15910327 |
| powdery mildew resistance and lr34/yr18 genes for durable resistance to leaf and stripe rust cosegregate at a locus on the short arm of chromosome 7d of wheat. | the incorporation of effective and durable disease resistance is an important breeding objective for wheat improvement. the leaf rust resistance gene lr34 and stripe rust resistance gene yr18 are effective at the adult plant stage and have provided moderate levels of durable resistance to leaf rust caused by puccinia triticina eriks. and to stripe rust caused by puccinia striiformis westend. f. sp. tritici. these genes have not been separated by recombination and map to chromosome 7ds in wheat. ... | 2005 | 15965649 |
| glyphosate inhibits rust diseases in glyphosate-resistant wheat and soybean. | glyphosate is a broad-spectrum herbicide used for the control of weeds in glyphosate-resistant crops. glyphosate inhibits 5-enolpyruvyl shikimate 3-phosphate synthase, a key enzyme in the synthesis of aromatic amino acids in plants, fungi, and bacteria. studies with glyphosate-resistant wheat have shown that glyphosate provided both preventive and curative activities against puccinia striiformis f. sp. tritici and puccinia triticina, which cause stripe and leaf rusts, respectively, in wheat. gro ... | 2005 | 16293685 |
| construction of a hexaploid wheat (triticum aestivum l.) bacterial artificial chromosome library for cloning genes for stripe rust resistance. | a hexaploid wheat (triticum aestivum l.) bacterial artificial chromosome (bac) library was constructed for cloning yr5 and other genes conferring resistance to stripe rust (puccinia striiformis f. sp. tritici). intact nuclei from a yr5 near-isogenic line were used to isolate high molecular weight dna, which was partially cleaved with hindiii and cloned into pecbac1 and pindigobac-5 vectors. the wheat bac library consisted of 422,400 clones arrayed in 1100 micro-titer plates (each plate with 384 ... | 2005 | 16391672 |
| genetic analysis of resistance to yellow rust in hexaploid wheat using a mixture model for multiple crosses. | dna-based molecular markers have been used in numerous studies for tagging specific genes in wheat for subsequent use in marker-assisted selection. usually in plant breeding, procedures for mapping genes are based on analysis of a single segregating population. however, breeding programmes routinely evaluate large numbers of progeny derived from multiple-related crosses with some parental lines shared. in most such related crosses, the number of progeny is quite small. thus, statistical techniqu ... | 2006 | 16395570 |
| identification and characterization of stripe rust resistance gene yr34 in common wheat. | an uncharacterized source of seedling resistance to puccinia striiformis f.sp. tritici was identified in an advanced wheat breeding line wawht2046. genetic analysis based on a wawht2046/carnamah-derived double haploid (dh) population demonstrated monogenic inheritance of seedling stripe rust resistance in wawht2046. the gene controlling stripe rust resistance in line wawht2046 was tentatively designated yrwa. the chromosome 5al located awn inhibitor gene b1, possessed by wawht2046, also showed m ... | 2006 | 16435125 |
| molecular tagging of stripe rust resistance gene yrzh84 in chinese wheat line zhou 8425b. | stripe rust, caused by puccinia striiformis f. sp. tritici (pst), is one of the most damaging diseases in common wheat (triticum aestivum l.). with the objective of identifying and tagging new genes for resistance to stripe rust, f1, f2 and f3 populations from the cross zhou 8425b/chinese spring were inoculated with chinese pst isolate cyr32 in the greenhouse. a total of 790 ssr primers were used to test the parents and resistant and susceptible bulks. the resulting seven polymorphic markers on ... | 2006 | 16450183 |
| molecular mapping of stripe rust resistance gene yrch42 in chinese wheat cultivar chuanmai 42 and its allelism with yr24 and yr26. | stripe rust, caused by puccinia striiformis f. sp. tritici (pst), is one of the most devastating diseases in common wheat (triticum aestivum l.) worldwide. the objectives of this study were to map a stripe rust resistance gene in chinese wheat cultivar chuanmai 42 using molecular markers and to investigate its allelism with yr24 and yr26. a total of 787 f2 plants and 186 f3 lines derived from a cross between resistant cultivar chuanmai 42 and susceptible line taichung 29 were used for resistance ... | 2006 | 16525837 |
| molecular mapping of a recessive gene for resistance to stripe rust in barley. | barley stripe rust, caused by puccinia striiformis f. sp. hordei, is one of the most important barley (hordeum vulgare) diseases in the united states. the disease is best controlled using resistant cultivars. barley genotype grannenlose zweizeilige (gz) has a recessive gene (rpsgz) that is effective against all races of p. striiformis f. sp. hordei identified so far in the usa. to develop a molecular map for mapping the gene, f(8 )recombinant inbred lines (rils) were developed from the steptoe x ... | 2006 | 16763858 |
| characterization of genetic loci conferring adult plant resistance to leaf rust and stripe rust in spring wheat. | leaf (brown) and stripe (yellow) rusts, caused by puccinia triticina and puccinia striiformis, respectively, are fungal diseases of wheat (triticum aestivum) that cause significant yield losses annually in many wheat-growing regions of the world. the objectives of our study were to characterize genetic loci associated with resistance to leaf and stripe rusts using molecular markers in a population derived from a cross between the rust-susceptible cultivar 'avocet s' and the resistant cultivar 'p ... | 2006 | 17036073 |
| [changes of dimboa contents in resistant and susceptible wheat near-isolines infected by puccinia striiformis f. sp. tritici]. | with two sets of wheat near-isolines having different genetic background as test materials, this paper studied the dynamics of their dimboa (2,4-dihydroxy-7-methoxy-1,4-benzoxazin-3-one) contents during puccinia striiformis f. sp. tritici infection. it was revealed that in un-inoculated plants, no significant difference was observed in dimboa contents among various resistant and susceptible inbred lines within the same set. but, at the initial stage of infection, the dimboa contents in all resis ... | 2006 | 17147173 |
| detection of fungal spores using a generic surface plasmon resonance immunoassay. | this paper describes a biosensor-based method for detection of fungal spores using surface plasmon resonance (spr). the approach involves the use of a mouse monoclonal antibody (pst mab8) and a spr sensor for label-free detection of urediniospores from the model organism puccinia striiformis f.sp. tritici (pst). in the subtractive inhibition assay, urediniospores and pst mab8 were mixed, urediniospore-bound pst mab8 removed by centrifugation and the remaining pst mab8 quantified using the spr se ... | 2007 | 17178456 |
| genetics and molecular mapping of genes for race-specific all-stage resistance and non-race-specific high-temperature adult-plant resistance to stripe rust in spring wheat cultivar alpowa. | stripe rust, caused by puccinia striiformis f. sp. tritici, is one of the most widespread and destructive wheat diseases worldwide. growing resistant cultivars is the preferred control of the disease. the spring wheat cultivar 'alpowa' has both race-specific, all-stage resistance and non-race-specific, high-temperature adult-plant (htap) resistances to stripe rust. to identify genes for the stripe rust resistances, alpowa was crossed with 'avocet susceptible' (avs). seedlings of the parents, and ... | 2007 | 17318493 |
| monoclonal antibodies for the detection of puccinia striiformis urediniospores. | the fungal pathogen pst causes yellow rust disease in wheat plants leading to crop losses. the organism spreads by releasing wind-dispersed urediniospores from infected plants. in this study a library of novel monoclonal antibodies (mabs) was developed against pst urediniospores. nine mab-producing cell lines were cloned and their cross-reactivities characterised against a panel of airborne fungal spores representing genera commonly found in the same environment as pst. two specific mabs were us ... | 2007 | 17350244 |
| construction and characterization of a full-length cdna library for the wheat stripe rust pathogen (puccinia striiformis f. sp. tritici). | puccinia striiformis is a plant pathogenic fungus causing stripe rust, one of the most important diseases on cereal crops and grasses worldwide. however, little is know about its genome and genes involved in the biology and pathogenicity of the pathogen. we initiated the functional genomic research of the fungus by constructing a full-length cdna and determined functions of the first group of genes by sequence comparison of cdna clones to genes reported in other fungi. | 2007 | 17547766 |
| rates of evolution of avirulence phenotypes and dna markers in a northwest european population of puccinia striiformis f. sp. tritici. | the effects of evolutionary processes in fungal pathogen populations may occur more rapidly and display larger effects in agricultural systems than in wild ecosystems because of human involvement by plant breeding and crop management. in this study, we analysed the rate of evolution in three lineages of a northwest european population of a biotrophic and asexual reproduced fungal pathogen, puccinia striiformis f. sp. tritici, causing yellow rust on wheat. pathogen samples were collected between ... | 2007 | 17887968 |
| mapping of adult plant stripe rust resistance genes in diploid a genome wheat species and their transfer to bread wheat. | stripe rust, caused by puccinia striiformis west. f.sp. tritici, is one of the most damaging diseases of wheat worldwide. forty genes for stripe rust resistance have been catalogued so far, but the majority of them are not effective against emerging pathotypes. triticum monococcum and t. boeoticum have excellent levels of resistance to rusts, but so far, no stripe rust resistance gene has been identified or transferred from these species. a set of 121 rils generated from a cross involving t. mon ... | 2008 | 17989954 |
| the control of asian rust by glyphosate in glyphosate-resistant soybeans. | glyphosate is a widely used broad-spectrum herbicide. recent studies in glyphosate-resistant (gr) crops have shown that, in addition to its herbicidal activity, glyphosate exhibits activity against fungi, thereby providing disease control benefits. in gr wheat, glyphosate has shown both preventive and curative activities against puccinia striiformis f. sp. tritici (erikss) co johnston and puccinia triticina erikss, which cause stripe and leaf rusts respectively. | 2008 | 18080285 |
| mapping of a major stripe rust resistance gene in chinese native wheat variety chike using microsatellite markers. | chike (accession number su1900), a chinese native wheat (triticum aestivum l.) variety, is resistant to the currently prevailing physiological races of puccinia striiformis westend. f. sp. tritici in china. genetic analysis indicated that resistance to the physiological race cy32 of the pathogen in the variety was controlled by one dominant gene. in this study, bsa (bulked segregant analysis) methods and ssrs (simple sequence repeats) marker polymorphic analysis are used to map the gene. the res ... | 2007 | 18155625 |
| molecular mapping of genes for race-specific overall resistance to stripe rust in wheat cultivar express. | 'express', a hard red spring wheat cultivar that has been widely grown in the western united states, is used to differentiate races of puccinia striiformis f. sp. tritici, the causal fungal pathogen of wheat stripe rust. to identify genes conferring race-specific, overall resistance to stripe rust, express was crossed with 'avocet s'. the parents and f(1), f(2), f(3) and f(5) populations were tested with races pst-1, pst-21, pst-43, and pst-45 of p. striiformis f. sp. tritici in the seedling sta ... | 2008 | 18214420 |
| early molecular diagnosis and detection of puccinia striiformis f. sp. tritici in china. | wheat stripe (yellow) rust, caused by puccinia striiformis f. sp. tritici (pst), is the most important foliar disease on wheat in china. early molecular diagnosis and detection of stripe rust will provide a useful aid to the accurate forecast and seasonal control of this destructive disease. our objective was to develop pcr assays for the rapid identification and detection of p. striiformis. | 2008 | 18363658 |
| stage-specific gene expression during urediniospore germination in puccinia striiformis f. sp tritici. | puccinia striiformis f. sp. tritici is an obligate biotrophic pathogen that causes leaf stripe rust on wheat. although it is critical to understand molecular mechanisms of pathogenesis in the wheat stripe rust fungus for developing novel disease management strategies, little is known about its genome and gene functions due to difficulties in molecular studies with this important pathogen. to identify genes expressed during early infection stages, in this study we constructed a cdna library with ... | 2008 | 18447959 |
| qtl identification and microphenotype characterisation of the developmentally regulated yellow rust resistance in the uk wheat cultivar guardian. | yellow rust (causal agent: puccinia striiformis f.sp. tritici) resistance in the uk wheat cultivar guardian is developmentally regulated, resistance increasing as the plant matures. yellow rust resistance was assessed under field conditions on plants after ear emergence to ensure maximum expression of resistance. three quantitative trait loci (qtl) for yellow rust resistance were identified, being located on chromosomes 1b (qpst.jic-1b), 2d (qpst.jic-2d) and 4b (qpst.jic-4b). the largest resista ... | 2008 | 18481042 |
| [research progress in molecular ecology of puccinia striiformis f. sp. tritici]. | stripe rust caused by puccinia striiformis f. sp. tritici westend is one of the most important epidemic diseases of wheat in the world. to understand the population evolution of this rust fungus will facilitate the control of this disease and the breeding of rust-resistant wheat. in the past decades, dna molecular markers have been applied to investigate the population genetics of wheat stripe rust fungus, and rapid progress has brought out in the research of p. striiformis molecular ecology. in ... | 2008 | 18533544 |
| identification and mapping qtl for high-temperature adult-plant resistance to stripe rust in winter wheat (triticum aestivum l.) cultivar 'stephens'. | high-temperature adult-plant (htap) resistance from the winter wheat (triticum aestivum) cultivar 'stephens' has protected wheat crops from stripe rust caused by puccinia striiformis f. sp. tritici for 30 years. the objectives of this study were to identify quantitative trait loci (qtl) for htap resistance in stephens through genetic linkage analysis and identify dna markers linked to the qtl for use in marker-assisted breeding. mapping populations consisted of 101 recombinant inbred lines (rils ... | 2008 | 18584147 |
| rapid global spread of two aggressive strains of a wheat rust fungus. | rust fungi can overcome the effect of host resistance genes rapidly, and spores can disperse long distance by wind. here we demonstrate a foreign incursion of similar strains of the wheat yellow rust fungus, puccinia striiformis f. sp. tritici, in north america, australia and europe in less than 3 years. one strain defined by identity at 15 virulence loci and 130 amplified fragment length polymorphism (aflp) fragments was exclusive to north america (present since 2000) and australia (since 2002) ... | 2008 | 18673440 |
| histopathology and pr-protein markers provide insight into adult plant resistance to stripe rust of wheat. | stripe rust, caused by puccinia striiformis f. sp. tritici, is a serious disease of wheat. the spring wheat cultivar kariega expresses complete adult plant resistance to stripe rust, whereas avocet s is susceptible. in former studies, quantitative trait loci (qtl) analysis of doubled haploid lines derived from a kariega x avocet s cross revealed two major qtl (qyr.sgi-7d and qyr.sgi-2b.1) and two minor qtl (qyr.sgi-1a and qyr.sgi-4a.1) responsible for the adult resistance of kariega in the field ... | 2008 | 18705847 |
| transcriptome analysis of the wheat-puccinia striiformis f. sp. tritici interaction. | stripe rust [caused by puccinia striiformis westend. f. sp. tritici eriks. (pst)] is a destructive disease of wheat (triticum aestivum l.) worldwide. genetic resistance is the preferred method for control and the yr5 gene, originally identified in triticum spelta var. album, represents a major resistance (r) gene that confers all-stage resistance to all currently known races of pst in the united states. to identify transcripts associated with the yr5-mediated incompatible interaction and the yr5 ... | 2008 | 18705849 |
| adult plant resistance-related gene expression in 'camp remy' wheat inoculated with puccinia striiformis. | the french wheat variety 'camp remy' (cr) possesses a durable, adult plant resistance to yellow rust (yr), caused by the pathogen puccinia striiformis. using cdna-aflp on different sets of heterogeneous inbred families (hifs) derived from the cross cr x récital, we compared gene expression profiles during one seedling and two adult developmental stages following inoculation with p. striiformis. transcripts differentially expressed in response to yr infection were isolated and cloned. sequence an ... | 2008 | 18705853 |
| transcriptome analysis of high-temperature adult-plant resistance conditioned by yr39 during the wheat-puccinia striiformis f. sp. tritici interaction. | stripe rust [caused by puccinia striiformis westend. f. sp. tritici eriks. (pst)] is a destructive disease of wheat (triticum aestivum l.) worldwide. high-temperature adult-plant (htap) resistance to stripe rust is race non-specific, inherited quantitatively and durable. previously, we identified and mapped the single yr39 htap stripe rust resistance gene in the spring wheat cultivar alpowa, which was identified on chromosome 7bl and accounted for 64.2% of the variation in resistance. to identif ... | 2008 | 18705862 |
| quantitative trait loci for non-race-specific, high-temperature adult-plant resistance to stripe rust in wheat cultivar express. | wheat cultivar express has durable, high-temperature adult-plant (htap) resistance to stripe rust (puccinia striiformis f. sp. tritici). to elucidate the genetic basis of the resistance, express was crossed with 'avocet susceptible' (avs). a mapping population of 146 f(5) recombinant inbred lines (rils) was developed using single-seed descent. the rils were evaluated at two sites near pullman in eastern washington and one site near mount vernon in western washington in 2005, and were evaluated n ... | 2009 | 18815766 |
| relationship among leaf (puccinia recondita roberge ex desmaz f. sp. tritici) and yellow (puccinia striiformis westendorp. f. sp. tritici) rust resistance and some agro-morphologic traits in wheat hybrids at seedling stage. | this research was carried out to determine if dominant morphological traits can be use instead of the rust resistance tests as marker characters for some agro-morphologic traits both leaf (puccinia recondita roberge ex desmaz. f. sp. tritici.) and yellow rust (puccinia striiformis westendorp f. sp. tritici) disease. for this, 13 wheat parent (4 are t. durum desf. and 9 are t. aestivum l.) were used and three main agro-morphologic traits (namely, leaf colour (lc) (dark and light green, dg and lg, ... | 2008 | 18819587 |
| transgressive segregation, heritability, and number of genes controlling durable resistance to stripe rust in one chinese and two italian wheat cultivars. | abstract wheat (triticum aestivum) cvs. libellula (lb), san pastore (sp), and xian nong 4 (xn4) possess durable resistance to stripe rust, caused by puccinia striiformis f. sp. tritici, and cv. ming xian 169 (mx169) is highly susceptible to the rust. inheritance of stripe rust resistance was studied by crossing the four cultivars and evaluating the resistance of parental, f(1), f(2), backcross, and f(3) plants in the fields. transgressive segregation for resistance was observed in the resistant ... | 2001 | 18942998 |
| genetic analysis and molecular mapping of wheat genes conferring resistance to the wheat stripe rust and barley stripe rust pathogens. | abstract stripe rust is one of the most important diseases of wheat and barley worldwide. on wheat it is caused by puccinia striiformis f. sp. tritici and on barley by p. striiformis f. sp. hordei most wheat genotypes are resistant to p. striiformis f. sp. hordei and most barley genotypes are resistant to p. striiformis f. sp. tritici. to determine the genetics of resistance in wheat to p. striiformis f. sp. hordei, crosses were made between wheat genotypes lemhi (resistant to p. striiformis f. ... | 2005 | 18943046 |
| identification of a quantitative trait locus for high-temperature adult-plant resistance against puccinia striiformis f. sp. hordei in 'bancroft' barley. | sustainable control of plant diseases can be achieved by developing cultivars with durable resistance. 'bancroft' barley has durable high-temperature, adult-plant (htap) resistance to stripe rust caused by puccinia striiformis f. sp. hordei. the objectives of this study were to determine the inheritance of the htap resistance in bancroft, develop molecular markers for the htap resistance using the resistance gene analog polymorphism (rgap) technique, map the htap resistance quantitative trait lo ... | 2008 | 18943247 |
| quantitative trait loci for high-temperature adult-plant and slow-rusting resistance to puccinia striiformis f. sp. tritici in wheat cultivars. | stripe rust, caused by puccinia striiformis f. sp. tritici, is one of the most damaging diseases of wheat (triticum aestivum) globally. high-temperature adult-plant resistance (htapr) and slow-rusting have great potential for sustainable management of the disease. the wheat cultivars luke and aquileja have been previously reported to possess htapr and slow-rusting to stripe rust, respectively. aquileja displayed less number of stripes per unit leaf area than luke, while luke showed lower infecti ... | 2008 | 18943256 |
| primary disease gradients of wheat stripe rust in large field plots. | abstract field data on disease gradients are essential for understanding the spread of plant diseases. in particular, dispersal far from an inoculum source can drive the behavior of an expanding focal epidemic. in this study, primary disease gradients of wheat stripe rust, caused by the aerially dispersed fungal pathogen puccinia striiformis, were measured in madras and hermiston, or, in the spring of 2002 and 2003. plots were 6.1 m wide by 128 to 171 m long, and inoculated with urediniospores i ... | 2005 | 18943296 |
| effects of planting density and the composition of wheat cultivar mixtures on stripe rust: an analysis taking into account limits to the replication of controls. | abstract the effect of plant density on disease is not well understood in populations of a single host plant genotype and has been studied even less in mixtures of host genotypes. we performed an experiment to evaluate the effect of wheat planting density on infection by puccinia striiformis in experimental plots with a single wheat genotype and in plots with two genotypes making up a range of frequencies. stripe rust severity in single-genotype plots increased with planting density in 1997 but ... | 2000 | 18943371 |
| the elasticity of the epidemic growth rate to observed weather patterns with an application to yellow rust. | abstract we extend a previously developed method that quantifies the sensitivity of the exponential epidemic growth rate, r, to weather changes, through a pathogen's life cycle components (basic reproduction number, latent period, and mean and standard deviation of the spore production curve). here a method is developed to study the elasticities of the system and subsequently the model is linked to observed weather patterns. this enables a direct comparison between the effects of different weath ... | 2007 | 18943522 |
| molecular mapping of the rps1.a recessive gene for resistance to stripe rust in bba 2890 barley. | abstract stripe rust, caused by puccinia striiformis f. sp. hordei, is one of the most important diseases of barley in the south-central and western united states. growing resistant cultivars is the best approach for controlling the disease. the barley genotype bba 2890 has all-stage resistance against all races of p. striiformis f. sp. hordei (psh) identified thus far in the united states. the resistance in bba 2890 is controlled by a single recessive gene, rps1.a. the objectives of this study ... | 2007 | 18943597 |
| preinoculation effects of light quantity on infection efficiency of puccinia striiformis and p. triticina on wheat seedlings. | abstract in a previous study under controlled conditions, a model was developed to predict the infection efficiency for the wheat leaf and stripe rust fungi based on temperature and dew period during the 24 h after inoculation. the two pathogens differed in their maximum infection efficiency under controlled conditions for temperature and dew period, the infection efficiency was 12 times greater for puccinia triticina than for p. striiformis. in the present study, the model was validated by fiel ... | 2002 | 18943885 |
| detection of nitric oxide in plants by electron spin resonance. | abstract three methods to detect nitric oxide (no()) are reported here. the first method was determining no() in extracted plant tissue. no() was trapped by spin trapping reagent containing diethyldithiocarbamate (detc) and feso(4), extracted by ethyl acetate, and determined with an electron spin resonance (esr) spectrometer. the second method was indirectly determining no() in live wheat leaves. seedlings were cultured in a medium containing feso(4), and the leaves were brushed by detc. then, t ... | 2004 | 18944117 |
| emergence of a novel population of puccinia striiformis f. sp. tritici in eastern united states. | the geographic range of stripe rust of wheat, caused by puccinia striiformis f. sp. tritici, has increased dramatically since 2000 in the united states. yield losses to the disease have been most severe in the eastern united states, where measurable yield loss had been rare prior to 2000. the objective of this study was to examine the phenotypic and genotypic variation among isolates of p. striiformis f. sp. tritici collected from populations in the eastern united states before and since 2000. v ... | 2008 | 18944286 |
| the sensitivity of the epidemic growth rate to weather variables, with an application to yellow rust on wheat. | abstract we first show how to estimate the exponential epidemic growth rate, r, for different combinations of three weather variables. then we derive a method to quantify the sensitivity of r to a weather variable as a function of the pathogen life cycle variables of latent period, basic reproductive number, and the mean and standard deviation of the sporulation curve. the method can be used to identify the most important weather variable and pathogen life cycle component in terms of epidemic pr ... | 2007 | 18944376 |
| inheritance and molecular mapping of barley genes conferring resistance to wheat stripe rust. | abstract most barley cultivars are resistant to stripe rust of wheat that is caused by puccinia striiformis f. sp. tritici. the barley cv. steptoe is susceptible to all identified races of p. striiformis f. sp. hordei (psh), the barley stripe rust pathogen, but is resistant to most p. striiformis f. sp. tritici races. to determine inheritance of the steptoe resistance to p. striiformis f. sp. tritici, a cross was made between steptoe and russell, a barley cultivar susceptible to some p. striifor ... | 2005 | 18944409 |
| recessive genes for resistance to puccinia striiformis f. sp. hordei in barley. | abstract barley genotypes abyssinian 14, bba 2890, grannelose zweizeilige, pi 548708, pi 548734, pi 548747, and stauffers obersulzer are resistant to all races of puccinia striiformis f. sp. hordei identified thus far in north america. astrix, bba 809, bigo, cambrinus, emir, heils franken, hiproly, i5, mazurka, trumpf, and varunda have specific resistance to certain races, whereas topper and steptoe are susceptible to all races. seedlings of parents and f(1), f(2), and f(3) progeny from crosses ... | 1999 | 18944763 |
| mapping a stripe rust resistance gene yrc591 in wheat variety c591 with ssr and aflp markers. | stripe rust, caused by puccinia striiformis westend. f. sp. tritici (pst), is one of the most destructive diseases of common wheat (triticum aestivum l.). to determine inheritance of stripe rust resistance and map the resistance gene(s) in wheat variety c591, f(1), f(2,) and f(3) progenies derived from the taichung 29 x c591 cross were inoculated with chinese pst race cy32 in the greenhouse. genetic analysis identified a single dominant gene, temporarily designated yrc591. a total of 178 ssr and ... | 2009 | 18946654 |
| a novel homeobox-like gene associated with reaction to stripe rust and powdery mildew in common wheat. | stripe rust and powdery mildew, caused by puccinia striiformis f. sp. tritici and blumeria graminis f. sp. tritici, respectively, are severe diseases in wheat (triticum aestivum) worldwide. in our study, differential amplification of a 201-bp cdna fragment was obtained in a cdna-amplified fragment length polymorphism (aflp) analysis between near-isogenic lines yr10nil and avocet s, inoculated with p. striiformis f. sp. tritici race cyr29. a full-length cdna (1,357 bp) of a homeobox-like gene, ta ... | 2008 | 19000003 |
| evidence for increased aggressiveness in a recent widespread strain of puccinia striiformis f. sp. tritici causing stripe rust of wheat. | stripe rust (yellow rust) of wheat, caused by puccinia striiformis f. sp. tritici, has become more severe in eastern united states, australia, and elsewhere since 2000. recent research has shown that this coincided with a global spread of two closely related strains that were similar based on virulence phenotype and amplified fragment length polymorphism. the objective of this research was to quantify differences in aggressiveness among isolates representative of the pre-2000 and post-2000 popul ... | 2009 | 19055439 |
| assessment of wheat breeding lines for slow yellow rusting (puccinia striiformis west. tritici). | a preliminary infection experiment was carried out during 2005-06 to identify slow yellow rusting sources of resistance in 20 nia-wheat breeding lines along with morocco as susceptible check at nuclear institute for food and agriculture, peshawar. it was revealed that the current pathotypes of puccinia striiformis west. tritici (pst) were found virulent on all tested genotypes except nia-6 and nia-14. host-pathogen compatibility in remaining lines facilitated the assessment of slow rusting trait ... | 2007 | 19090166 |
| tracking costs of virulence in natural populations of the wheat pathogen, puccinia striiformis f.sp.tritici. | costs of adaptation play an important role in host-parasite coevolution. for parasites, evolving the ability to circumvent host resistance may trade off with subsequent growth or transmission. such costs of virulence (sensu plant pathology) limit the spread of all-infectious genotypes and thus facilitate the maintenance of genetic polymorphism in both host and parasite. we investigated costs of three virulence factors in puccinia striiformis f.sp.tritici, a fungal pathogen of wheat (triticum aes ... | 2009 | 19183485 |
| a kinase-start gene confers temperature-dependent resistance to wheat stripe rust. | stripe rust is a devastating fungal disease that afflicts wheat in many regions of the world. new races of puccinia striiformis, the pathogen responsible for this disease, have overcome most of the known race-specific resistance genes. we report the map-based cloning of the gene yr36 (wks1), which confers resistance to a broad spectrum of stripe rust races at relatively high temperatures (25 degrees to 35 degrees c). this gene includes a kinase and a putative start lipid-binding domain. five ind ... | 2009 | 19228999 |
| whole genome amplification of the rust puccinia striiformis f. sp. tritici from single spores. | rust fungi are obligate parasites and cannot be routinely cultured to obtain sufficient biomass for dna extractions. multiple displacement amplification (mda) was demonstrated in this study for whole genome amplification from single spores of the rust fungus, puccinia striiformis. the genomic dna coverage and fidelity of this method was evaluated by pcr amplification and sequencing of two genetic markers: portions of the multi-copy nuclear ribosomal dna internal transcribed spacer region (its) a ... | 2009 | 19233233 |
| rapid and targeted introgression of genes into popular wheat cultivars using marker-assisted background selection. | a marker-assisted background selection (mabs)-based gene introgression approach in wheat (triticum aestivum l.) was optimized, where 97% or more of a recurrent parent genome (rpg) can be recovered in just two backcross (bc) generations. a four-step mabs method was developed based on 'plabsim' computer simulations and wheat genome structure information. during empirical optimization of this method, double recombinants around the target gene were selected in a step-wise fashion during the two bc c ... | 2009 | 19484121 |
| cdna-aflp analysis reveals differential gene expression in compatible interaction of wheat challenged with puccinia striiformis f. sp. tritici. | puccinia striiformis f. sp. tritici is a fungal pathogen causing stripe rust, one of the most important wheat diseases worldwide. the fungus is strictly biotrophic and thus, completely dependent on living host cells for its reproduction, which makes it difficult to study genes of the pathogen. in spite of its economic importance, little is known about the molecular basis of compatible interaction between the pathogen and wheat host. in this study, we identified wheat and p. striiformis genes ass ... | 2009 | 19566949 |
| evidence of genetic recombination in wheat yellow rust populations of a chinese oversummering area. | wheat yellow rust (puccinia striiformis f.sp. tritici) (pst) has been described as a strongly clonal species in both european and australian populations, with very limited molecular diversity but rapidly evolving virulences. contrastingly, marked genetic diversity has been reported in chinese pst populations. to test whether such variability could originate from oversummering areas, we assessed the diversity of virulence and molecular markers (aflp and ssr) using 412 pst isolates from the highla ... | 2009 | 19570502 |
| characterization of genetic components involved in durable resistance to stripe rust in the bread wheat 'renan'. | stripe rust, caused by puccinia striiformis f. tritici, is one of the most widespread and destructive wheat diseases in areas where cool temperatures prevail. the wheat cv. renan, carrying the specific gene yr17, has shown effective resistance for a long time, even though some pathotypes overcame the yr17 gene. the objectives of this study were to locate and map genetic loci associated with adult-plant resistance (apr) to stripe rust in a recombinant inbred line population derived from a cross b ... | 2009 | 19594316 |
| response to stripe rust (puccinia striiformis westend. f. sp. tritici) and its coincidence with leaf rust resistance in hexaploid introgressive triticale lines with triticum monococcum genes. | triticale introgressive lines were developed by incorporating diploid wheat (triticum monococcum [tm16]) genes into the hexaploid triticale genotype lt522/6. the synthetic allotetraploid t. monococcum cereale (a(m) a(m)rr) was used as a bridging form to introduce the genes. a group of 43 introgressive lines, parental stocks and a check cultivar were inoculated at the seedling stage (in the greenhouse) and at the adult plant stage (in the field) with four pathotypes of puccinia striiformis f. sp. ... | 2009 | 19638675 |
| identifying qtl for high-temperature adult-plant resistance to stripe rust (puccinia striiformis f. sp. tritici) in the spring wheat (triticum aestivum l.) cultivar 'louise'. | over time, many single, all-stage resistance genes to stripe rust (puccinia striiformis f. sp. tritici) in wheat (triticum aestivum l.) are circumvented by race changes in the pathogen. in contrast, high-temperature, adult-plant resistance (htap), which only is expressed during the adult-plant stage and when air temperatures are warm, provides durable protection against stripe rust. our objective was to identify major quantitative trait loci (qtl) for htap resistance to stripe rust in the spring ... | 2009 | 19644666 |
| molecular mapping of a stripe rust resistance gene in spring wheat cultivar zak. | stripe rust (yellow rust), caused by puccinia striiformis f. sp. tritici, is one of the most devastating foliar diseases of wheat (triticum aestivum) worldwide. growing resistant cultivars is the best approach for control of the disease. although the stripe rust resistance in spring wheat cv. zak has been circumvented by a group of races of the pathogen predominant in the united states since 2000, the resistance genes in zak were unknown. to identify and map the genes for resistance to stripe ru ... | 2009 | 19740035 |
| cloning and characterization of a wheat beta-1,3-glucanase gene induced by the stripe rust pathogen puccinia striiformis f. sp. tritici. | b-1,3-glucanases are a group of pathogenesis related proteins that have been reported to be involved in plant defense against pathogens in many other plant pathogen systems. however, it was not clear if these genes play similar role in wheat (triticum aestivum l.) against puccinia striiformis f. sp. tritici (pst), the stripe rust pathogen. to investigate the role of b-1,3-glucanase (ec3.2.1.39) in the resistance response of wheat (cv. suwon11) to stripe rust, a wheat b-1,3-glucanase gene induced ... | 2010 | 19757158 |
| geographic limits of a clonal population of wheat yellow rust in the mediterranean region. | most plant pathogens present complex life cycles, in which the clonal reproduction may impede the delimitation of population entities. by studying the genetic structure of the wheat yellow rust caused by puccinia striiformis f.sp. tritici (pst), we highlighted difficulties impeding population delimitation in highly clonal species. despite the high dispersal potential of pst, southern france isolates were shown to be divergent from a northwestern european population. a 2-year survey was performed ... | 2009 | 19769694 |
| genetic behavior of controlling area under disease progress curve for stripe rust (puccinia striiformis f. sp. tritici) in two wheat (triticum aestivum) crosses. | genetic effects on controlling resistance to stripe rust (puccinia striiformis f. sp. tritici eriksson)were determined in two wheat crosses, bakhtawar-92 (b-92) x frontana and inqilab-91 x fakhre sarhad using area under the disease progress curve (audpc) as a measure of stripe rust resistance. the resistant and susceptible parents involved in developing genetic populations were identified by initial assessment of 45 wheat accessions for stripe rust reaction. mixed inheritance model was applied t ... | 2009 | 19821730 |
| identification of expressed genes during compatible interaction between stripe rust (puccinia striiformis) and wheat using a cdna library. | wheat stripe rust, caused by puccinia striiformis f. sp. tritici (pst), is one of the most destructive diseases of wheat worldwide. to establish compatibility with the host, pst forms special infection structures to invade the plant with minimal damage to host cells. although compatible interaction between wheat and pst has been studied using various approaches, research on molecular mechanisms of the interaction is limited. the aim of this study was to develop an est database of wheat infected ... | 2009 | 19995415 |
| generation and analysis of expression sequence tags from haustoria of the wheat stripe rust fungus puccinia striiformis f. sp. tritici. | stripe rust, caused by puccinia striiformis f. sp. tritici (pst), is one of the most destructive diseases of wheat (triticum aestivum l.) worldwide. in spite of its agricultural importance, the genomics and genetics of the pathogen are poorly characterized. pst transcripts from urediniospores and germinated urediniospores have been examined previously, but little is known about genes expressed during host infection. some genes involved in virulence in other rust fungi have been found to be speci ... | 2009 | 20028560 |
| differential gene expression in incompatible interaction between wheat and stripe rust fungus revealed by cdna-aflp and comparison to compatible interaction. | stripe rust of wheat, caused by puccinia striiformis f. sp. tritici (pst), is one of the most important diseases of wheat worldwide. due to special features of hexaploid wheat with large and complex genome and difficulties for transformation, and of pst without sexual reproduction and hard to culture on media, the use of most genetic and molecular techniques in studying genes involved in the wheat-pst interactions has been largely limited. the objective of this study was to identify transcriptio ... | 2010 | 20067621 |
| puccinia striiformis f.sp. tritici presents high diversity and recombination in the over-summering zone of gansu, china. | puccinia striiformis f.sp. tritici (pst), a basidiomycota responsible for wheat yellow rust, has a strict clonal behavior and a low genetic diversity in european and australian populations. on the other hand high diversity has been reported in chinese populations. moreover it is thought that in china yellow rust epidemics start recurrently from the western highlands where over-summering occurs. to compare pst genetic diversity in this area to the one described in france seven aflp primer combina ... | 2010 | 20120228 |
| pathogen race determines the type of resistance response in the stripe rust-triticum dicoccoides pathosystem. | wild relatives of crop plants may serve as a promising source for screening for new disease resistance genes that can be utilized in breeding programs. triticum dicoccoides, the wild progenitor of most cultivated wheats, was shown to harbor many resistance genes against the major diseases attacking cultivated wheat. stripe rust is a devastating fungal disease that attacks wheat in many regions of the world. new races of puccinia striiformis westend. f. sp. tritici, the causative agent of stripe ... | 2010 | 20163557 |
| constructing physical and genomic maps for puccinia striiformis f. sp. tritici, the wheat stripe rust pathogen, by comparing its est sequences to the genomic sequence of p. graminis f. sp. tritici, the wheat stem rust pathogen. | the wheat stripe rust fungus, puccinia striiformis f. sp. tritici (pst), does not have a known alternate host for sexual reproduction, which makes it impossible to study gene linkages through classic genetic and molecular mapping approaches. in this study, we compared 4,219 pst expression sequence tags (ests) to the genomic sequence of p. graminis f. sp. tritici (pgt), the wheat stem rust fungus, using blast searches. the percentages of homologous genes varied greatly among different pst librari ... | 2010 | 20169145 |
| wheat defense genes in fungal (puccinia striiformis) infection. | wheat stripe rust, caused by puccinia striiformis f. sp. tritici, is one of the most important diseases of wheat worldwide. to isolate defense-related genes against the pathogen, a suppression subtractive hybridization library was constructed for an incompatible interaction. from the library, 652 sequences were determined to be unigenes, of which 31 were determined as genes involved in signal transduction and 77 were predicted to encode defense-related proteins. expression patterns of 12 selecte ... | 2010 | 20186453 |
| molecular mapping of a gene for stripe rust resistance in spring wheat cultivar ido377s. | stripe rust, caused by puccinia striiformis f. sp. tritici, is one of the most important diseases of wheat worldwide. the best strategy to control stripe rust is to grow resistant cultivars. one such cultivar resistant to most races in north america is 'ido377s'. to study the genetics of its resistance this spring wheat cultivar was crossed with 'avocet susceptible' (avs). seedlings of the parents, f(2) plants, and f(3) lines were tested under controlled greenhouse conditions with races pst-43 a ... | 2010 | 20198466 |
| identification of genomic regions controlling adult-plant stripe rust resistance in chinese landrace pingyuan 50 through bulked segregant analysis. | abstract stripe rust, caused by puccinia striiformis f. sp. tritici, is one of the most widespread and destructive wheat diseases worldwide. growing resistant cultivars with adult-plant resistance (apr) is an effective approach for the control of the disease. in this study, 540 simple sequence repeat markers were screened to map quantitative trait loci (qtl) for apr to stripe rust in a doubled haploid (dh) population of 137 lines derived from the cross pingyuan 50 x mingxian 169. the dh lines we ... | 2010 | 20205534 |
| [cloning and expression of a class ii chitin synthase gene pstchs ii from the rust fungus puccinia striiformis]. | to clone the chitin synthase gene pstchs ii from puccinia striiformis and to analyze its expression pattern. | 2009 | 20222448 |
| characterization of a wheat hsp70 gene and its expression in response to stripe rust infection and abiotic stresses. | members of the family of 70-kd heat shock proteins (hsp70 s) play various stress-protective roles in plants. in this study, a wheat hsp70 gene was isolated from a suppression subtractive hybridization (ssh) cdna library of wheat leaves infected by puccinia striiformis f. sp. tritici. the gene, that was designated as tahsc70, was predicted to encode a protein of 690 amino acids, with a molecular mass of 73.54 kda and a pi of 5.01. further analysis revealed the presence of a conserved signature th ... | 2011 | 20349142 |
| century-old mystery of puccinia striiformis life history solved with the identification of berberis as an alternate host. | the life history of puccinia striiformis remains a mystery because the alternate host has never been identified. inoculation of grasses using aeciospores from naturally infected berberis chinensis and b. koreana resulted in infection on poa pratensis, producing uredinia typical of stripe rust caused by p. striiformis. analyses using real-time polymerase chain reaction and dna sequence confirmed the rust fungus as p. striiformis. pycnia and aecia were produced on b. chinensis, b. holstii, b. kore ... | 2010 | 20373963 |
| [cloning and transcriptional profiling of a cell division cycle gene pscdc2 from stripe rust fungus during incompatible and compatible interaction between wheat and puccinia striiformis f. sp. tritici]. | we cloned a cell division cycle pscdc2 from puccinia striiformis f. sp. tritici (pst) and analyze its expression profile. | 2010 | 20387459 |
| slow rusting resistance in 19 promising wheat lines to yellow rust in ardabil, iran. | yellow rust caused by puccinia striiformis f. sp. tritici is undoubtedly, the most important fungal disease of wheat especially in central and western asia that causes significant annual yield losses. production and use of cultivars with durable resistance is the best controlling method. for this purpose, study on reaction of 19 promising lines to yellow rust was carried out in ardabil in 2008-2009 cropping year. assessment of adult plant reaction was conducted under field condition with artific ... | 2010 | 20464947 |
| reduction in the sex ability of worldwide clonal populations of puccinia striiformis f.sp. tritici. | puccinia striiformis f.sp. tritici (pst), has so far been considered to reproduce asexually with until very recently no known alternate host, has a clonal population structure in the usa, australia and europe. however, recently, high genotypic diversity in eastern asia and recombinant populations in china has been reported. variations in the ability for sexual reproduction could provide an explanation for such a geographical gradient in genotypic diversity. in order to address this hypothesis, w ... | 2010 | 20637888 |
| cellular and transcriptional responses of wheat during compatible and incompatible race-specific interactions with puccinia striiformis f. sp. tritici. | the initial stages of puccinia striiformis f. sp. tritici (the causal agent of yellow rust in wheat) infection triggered a hypersensitive cell death (hcd) response in both compatible and yr1-mediated incompatible interactions, although the response was earlier and more extensive in the incompatible interaction. later stages of fungal development were only associated with an hcd response in the incompatible interaction, the hcd response being effectively suppressed in the compatible interaction. ... | 2010 | 20696001 |
| [cloning and transcriptional profiling of psncs1 from puccinia striiformis f. sp. tritici]. | we cloned psncs1 encoding neuronal calcium sensor from pst and analyzed its transcriptional profile. | 2010 | 20815246 |
| yr45, a new wheat gene for stripe rust resistance on the long arm of chromosome 3d. | stripe rust, caused by puccinia striiformis f. sp. tritici, is one of the most destructive diseases of wheat worldwide. growing resistant cultivars is the most effective approach to control the disease, but only a few genes confer effective all-stage resistance against the current populations of the pathogen worldwide. it is urgent to identify new genes for diversifying sources of resistance genes and for pyramiding genes for different types of resistance in order to achieve high levels of durab ... | 2011 | 20838759 |
| mapping genes lr53 and yr35 on the short arm of chromosome 6b of common wheat with microsatellite markers and studies of their association with lr36. | the rust resistance genes lr53 and yr35, transferred to common wheat from triticum dicoccoides, were reported previously to be completely linked on chromosome 6b. four f (3) families were produced from a cross between a line carrying lr53 and yr35 (98m71) and the leaf rust and stripe rust susceptible genotype avocet "s" and were rust tested using puccinina triticina pathotype 53-1,(6),(7),10,11 and puccinia striiformis f. sp. tritici pathotype 110 e143 a+. the homozygous resistant lines produced ... | 2010 | 20924745 |
| taxonomic study of stripe rust, puccinia striiformis sensu lato, based on molecular and morphological evidence. | phylogenetic analyses of its and β-tubulin dna sequences for 30 puccinia striiformis specimens from wide geographic and host ranges revealed four strongly supported monophyletic lineages. based on comparisons of morphological characteristics, and after consideration of previous classifications, the lineages were recognized as p. striiformis sensu stricto, puccinia pseudostriiformis, puccinia striiformoides and one new species, puccinia gansensis. a new series (puccinia series striiformis) was er ... | 2010 | 20943198 |