| genetics of a difference in pigmentation between drosophila yakuba and drosophila santomea. | drosophila yakuba is a species widespread in africa, whereas d. santomea, its newly discovered sister species, is endemic to the volcanic island of são tomé in the gulf of guinea. drosophila santomea probably formed after colonization of the island by its common ancestor with d. yakuba. the two species differ strikingly in pigmentation: d. santomea, unlike the other eight species in the d. melanogaster subgroup, almost completely lacks dark abdominal pigmentation. d. yakuba shows the sexually di ... | 2002 | 12487356 |
| recurrent specialization on a toxic fruit in an island drosophila population. | recurrent specialization on similar host plants offers a unique opportunity to unravel the evolutionary and genetic mechanisms underlying dietary shifts. recent studies have focused on ecological races belonging to the same species, but it is hard in many cases to untangle the role of adaptive introgression versus distinct mutations in facilitating recurrent evolution. we discovered on the island of mayotte a population of the generalist fly drosophila yakuba that is strictly associated with non ... | 2016 | 27044093 |
| tandem duplications and the limits of natural selection in drosophila yakuba and drosophila simulans. | tandem duplications are an essential source of genetic novelty, and their variation in natural populations is expected to influence adaptive walks. here, we describe evolutionary impacts of recently-derived, segregating tandem duplications in drosophila yakuba and drosophila simulans. we observe an excess of duplicated genes involved in defense against pathogens, insecticide resistance, chorion development, cuticular peptides, and lipases or endopeptidases associated with the accessory glands ac ... | 2015 | 26176952 |
| landscape of standing variation for tandem duplications in drosophila yakuba and drosophila simulans. | we have used whole genome paired-end illumina sequence data to identify tandem duplications in 20 isofemale lines of drosophila yakuba and 20 isofemale lines of d. simulans and performed genome wide validation with pacbio long molecule sequencing. we identify 1,415 tandem duplications that are segregating in d. yakuba as well as 975 duplications in d. simulans, indicating greater variation in d. yakuba. additionally, we observe high rates of secondary deletions at duplicated sites, with 8% of du ... | 2014 | 24710518 |
| intron length evolution in drosophila. | i present data on the evolution of intron lengths among 3 closely related drosophila species, d. melanogaster, drosophila simulans, and drosophila yakuba. using d. yakuba as an outgroup, i mapped insertion and deletion mutations in 148 introns (spanning approximately 30 kb) to the d. melanogaster and d. simulans lineages. intron length evolution in the 2 sister species has been different: in d. melanogaster, x-linked introns have increased slightly in size, whereas autosomal ones have decreased ... | 2006 | 16923822 |
| population genetics of polymorphism and divergence. | frequencies of mutant sites are modeled as a poisson random field in two species that share a sufficiently recent common ancestor. the selective effect of the new alleles can be favorable, neutral, or detrimental. the model is applied to the sample configurations of nucleotides in the alcohol dehydrogenase gene (adh) in drosophila simulans and drosophila yakuba. assuming a synonymous mutation rate of 1.5 x 10(-8) per site per year and 10 generations per year, we obtain estimates for the effectiv ... | 1992 | 1459433 |
| population structure and mitochondrial dna gene flow in old world populations of drosophila subobscura. | an extensive survey of mitochondrial dna (mtdna) restriction polymorphism in 156 isofemale lines from 29 different geographic populations of drosophila subobscura distributed throughout the old world was carried out. ten restriction enzymes were used, five of which revealed restriction site polymorphism. of the 31 restriction sites detected, 13 were found to be polymorphic. comparisons with the mtdna map of drosophila yakuba indicate that the variable sites are mainly concentrated in protein gen ... | 1992 | 1346531 |
| discrepancy in divergence of the mitochondrial and nuclear genomes of drosophila teissieri and drosophila yakuba. | restriction sites were compared in the mitochondrial dna (mtdna) molecules from representatives of two closely related species of fruit flies: nine strains of drosophila teissieri and eight strains of drosophila yakuba. nucleotide diversities among d. teissieri strains and among d. yakuba strains were 0.07% and 0.03%, respectively, and the nucleotide distance between the species was 0.22%. also determined was the nucleotide sequence of a 2305-nucleotide pair (ntp) segment of the mtdna molecule o ... | 1990 | 2115928 |
| wolbachia in the drosophila yakuba complex: pervasive frequency variation and weak cytoplasmic incompatibility, but no apparent effect on reproductive isolation. | three hybridizing species-the clade [(drosophila yakuba, d. santomea), d. teissieri]-comprise the yakuba complex in the d. melanogaster subgroup. their ranges overlap on bioko and são tomé, islands off west africa. all three species are infected with wolbachia-maternally inherited, endosymbiotic bacteria, best known for manipulating host reproduction to favor infected females. previous analyses reported no cytoplasmic incompatibility (ci) in these species. however, we discovered that wolbachia f ... | 2017 | 27821433 |
| drosophila yakuba mayottensis, a new model for the study of incipient ecological speciation. | a full understanding of how ecological factors drive the fixation of genetic changes during speciation is obscured by the lack of appropriate models with clear natural history and powerful genetic toolkits. in a recent study, we described an early stage of ecological speciation in a population of the generalist species drosophila yakuba (melanogaster subgroup) on the island of mayotte (indian ocean). on this island, flies are strongly associated with the toxic fruits of noni (morinda citrifolia) ... | 2017 | 27560369 |
| hydrocarbon patterns and mating behaviour in populations of drosophila yakuba. | drosophila yakuba is widespread in africa. here we compare the cuticular hydrocarbon (chc) profiles and mating behavior of mainland (kounden, cameroon) and island (mayotte, sao-tome, bioko) populations. the strains each had different chc profiles: bioko and kounden were the most similar, while mayotte and sao-tome contained significant amounts of 7-heptacosene. the chc profile of the sao-tome population differed the most, with half the 7-tricosene of the other populations and more 7-heptacosene ... | 2015 | 26516919 |
| complete mitochondrial genome of drabescoides nuchalis (hemiptera: cicadellidae). | the complete mitochondrial genome (mitogenome) of drabescoides nuchalis (hemiptera: cicadellidae) was sequenced. it is 15 309 bp in length with 75.62% (a + t) content and comprises 13 protein-coding genes, 22 transfer rnas, two ribosomal rna genes, and a non-coding region (genbank accession no. kr349344). gene order is identical to that of the inferred ancestral insect genome. all pcgs start with an atn codon and terminate with taa except nd4, which has an incomplete stop codon (t). the anticodo ... | 2016 | 26436567 |
| parallel faster-x evolution of gene expression and protein sequences in drosophila: beyond differences in expression properties and protein interactions. | population genetics models predict that the x (or z) chromosome will evolve at faster rates than the autosomes in xy (or zw) systems. studies of molecular evolution using large datasets in multiple species have provided evidence supporting this faster-x effect in protein-coding sequences and, more recently, in transcriptomes. however, x-linked and autosomal genes differ significantly in important properties besides hemizygosity in males, including gene expression levels, tissue specificity in ge ... | 2015 | 25789611 |
| the complete mitochondrial genome of dixella sp. (diptera: nematocera, dixidae). | in the present paper, the first complete mitochondrial genome of the family dixidae is reported. the complete mitochondrial genome of dixella sp. is a circular molecule of 15,574 bp in length, containing all 37 genes including 13 protein-coding genes (pcgs), 22 transfer rna genes (trnas), 2 ribosomal rna genes (srrna and lrrna), and a long control region. its gene arrangement is conserved with the ancestral gene order of drosophila yakuba, which is considered to exhibit the ground pattern of hex ... | 2016 | 25187169 |
| complete mitochondrial genome of empoasca vitis (hemiptera: cicadellidae). | the complete mitochondrial genome of empoasca vitis was sequenced. the length of the mitogenome is 15,154 bp with 78.35% at content (genbank accession no. kj815009). the genome encode 37 typical mitochondrial genes including 22 transfer rna genes, 13 protein-coding genes, 2 ribosomal rna genes and an a+t-rich region. the gene arrangement is similar to that of drosophila yakuba, the presumed ancestral insect mitochondrial gene arrangement. except for cox2 using gtg as start codon, other protein-c ... | 2016 | 24963771 |
| the role of founder effects on the evolution of reproductive isolation. | several theories argue that large changes in allele frequencies through genetic drift after a small founding population becomes allopatrically isolated can lead to significant changes in reproductive isolation and thus trigger the origin of new species. for this reason, founder speciation has been proposed as a potent force in the generation of new species. nonetheless, the relative importance of such 'founder effects' remains largely untested. in this report, i used experimental evolution to cr ... | 2013 | 24118666 |
| the influence of abdominal pigmentation on desiccation and ultraviolet resistance in two species of drosophila. | drosophila yakuba and d. santomea are sister species that differ in their levels of abdominal pigmentation; d. yakuba shows heavily pigmented posterior abdominal segments in both sexes, whereas d. santomea lacks dark pigment anywhere on its body. using naturally collected lines, we demonstrate the existence of altitudinal variation in abdominal pigmentation in d. yakuba but not in d. santomea. we use the variation in pigmentation within d. yakuba and two body-color mutants in d. yakuba to elucid ... | 2013 | 23888866 |
| complete mitochondrial genome of neochauliodes bowringi (maclachlan) (megaloptera: corydalidae). | we describe and analyze the complete mitochondrial genome of neochauliodes bowringi (maclachlan) (megaloptera: corydalidae). the length of the genome is 16,064 bp (genbank accession no. jq351950), the longest mitochondrial genome in the order megaloptera already got, which includes 22 transfer rna genes, 13 protein-coding genes, two ribosomal rnas and an a + t-rich region. the gene arrangement is similar to that of drosophila yakuba, the presumed ancestral insect mitochondrial gene arrangement. ... | 2015 | 23859054 |
| the complete mitochondrial genome of the chinese peacock, papilio bianor (insecta: lepidoptera: papilionidae). | the sequence of the mitochondrial genome (mitogenome) of the chinese peacock papilio bianor has been completed. it is 15,332 bp with an a + t content of 80.6% and contains the typical complement of 13 protein-coding genes (pcgs), 22 transfer rna (trna), and 2 ribosomal rna (rrna) genes. comparison of this sequence with the sequences of the other completely sequenced insect mitogenomes showed that the gene order and orientation are basically identical to that of drosophila yakuba with the excepti ... | 2013 | 23442187 |
| evolution of multiple additive loci caused divergence between drosophila yakuba and d. santomea in wing rowing during male courtship. | in drosophila, male flies perform innate, stereotyped courtship behavior. this innate behavior evolves rapidly between fly species, and is likely to have contributed to reproductive isolation and species divergence. we currently understand little about the neurobiological and genetic mechanisms that contributed to the evolution of courtship behavior. here we describe a novel behavioral difference between the two closely related species d. yakuba and d. santomea: the frequency of wing rowing duri ... | 2012 | 22952802 |
| the rapid evolution of x-linked male-biased gene expression and the large-x effect in drosophila yakuba, d. santomea, and their hybrids. | the x chromosome has a large effect on hybrid dysfunction, particularly on hybrid male sterility. although the evidence for this so-called large-x effect is clear, its molecular causes are not yet fully understood. one possibility is that, under certain conditions, evolution proceeds faster in x-linked than in autosomal loci (i.e., faster-x effect) due to both natural selection and their hemizygosity in males, an effect that is expected to be greatest in genes with male-biased expression. here, ... | 2012 | 22844069 |
| the complete mitochondrial genome of the flesh fly, sarcophaga impatiens walker (diptera: sarcophagidae). | approximately 2500 fly species comprise the sarcophagidae family worldwide. the complete mitochondrial genome of the carrion-breeding, forensically important sarcophaga impatiens walker (diptera: sarcophagidae) from australia was sequenced. the 15,169 bp circular genome contains the 37 genes found in a typical metazoan genome: 13 protein-coding genes, 2 ribosomal rna genes and 22 transfer rna genes. it also contains one non-coding a þ t-rich region. the arrangement of the genes was the same as t ... | 2012 | 22292894 |
| genome dedoubling by dcj and reversal. | segmental duplications in genomes have been studied for many years. recently, several studies have highlighted a biological phenomenon called breakpoint-duplication that apparently associates a significant proportion of segmental duplications in mammals, and the drosophila species group, to breakpoints in rearrangement events. | 2011 | 22152053 |
| the complete mitochondrial genome of the gall-forming fly, fergusonina taylori nelson and yeates (diptera: fergusoninidae). | the monogeneric family fergusoninidae consists of gall-forming flies that, together with fergusobia (tylenchida: neotylenchidae) nematodes, form the only known mutualistic association between insects and nematodes. in this study, the entire 16,000 bp mitochondrial genome of fergusonina taylori nelson and yeates was sequenced. the circular genome contains one encoding region including 27 genes and one non-coding a+t-rich region. the arrangement of the protein-coding, ribosomal rna (rrna) and tran ... | 2011 | 22165837 |
| the complete mitochondrial genome of the leafminer liriomyza trifolii (diptera: agromyzidae). | liriomyza trifolii (diptera: agromyzidae) is one of the most economically significant pests in the world. in this paper we present sequence data for the complete mitochondrial genome of l. trifolii. the circular genome is 16,141 bp long and contains one encoding region including 37 genes and one non-coding a+t-rich region. gene numbers and organization is similar to that of the typical insect mitochondrial genomes except that two additional trna genes are found in the a+t-rich region (trna(thr) ... | 2011 | 20376704 |
| reinforcement of gametic isolation in drosophila. | reinforcement, a process by which natural selection increases reproductive isolation between populations, has been suggested to be an important force in the formation of new species. however, all existing cases of reinforcement involve an increase in mate discrimination between species. here, i report the first case of reinforcement of postmating prezygotic isolation (i.e., barriers that act after mating but before fertilization) in animals. on the slopes of the african island of são tomé, droso ... | 2010 | 20351771 |
| complete mitochondrial genome of the small brown planthopper, laodelphax striatellus (delphacidae: hemiptera), with a novel gene order. | we determined the first complete mitochondrial genome (mitogenome) sequence from a representative of the insect family delphacidae, laodelphax striatellus. the 16,513 bp long l. striatellus mitogenome encodes 13 putative proteins, two ribosomal rnas, and 22 transfer rnas, and contains a putative control region (or a+t-rich region). the nucleotide composition is biased toward adenine and thymine (77.2% a+t), and the amino acid composition is affected to a similar degree by the at mutational bias. ... | 2009 | 19968473 |
| the complete mitochondrial genome sequence of geisha distinctissima (hemiptera: flatidae) and comparison with other hemipteran insects. | the complete nucleotide sequence of the mitochondrial genome (mitogenome) of geisha distinctissima (hemiptera: flatidae) has been determined in this study. the genome is a circular molecule of 15,971 bp with a total a+t content of 75.1%. the gene content, order, and structure are consistent with the drosophila yakuba genome structure and the hypothesized ancestral arthropod genome arrangement. all 13 protein-coding genes are observed to have a putative, inframe atr methionine or att isoleucine c ... | 2009 | 19280059 |
| a serpin from the parasitoid wasp leptopilina boulardi targets the drosophila phenoloxidase cascade. | the insect phenoloxidase (po) cascade is known to be tightly regulated by serine proteases and serine protease inhibitors of the serpin family. as a key component of the insect immune system, it is also suspected to be inhibited by several endoparasitoid wasps, insects that develop inside other arthropods as hosts. however, the underlying mechanisms of this inhibition are largely undescribed. here, we report the characterization of a gene encoding a serpin, lbspny, highly expressed in the venom ... | 2009 | 19109990 |
| comparative and phylogenomic studies on the mitochondrial genomes of pentatomomorpha (insecta: hemiptera: heteroptera). | nucleotide sequences and the gene arrangements of mitochondrial genomes are effective tools for resolving phylogenetic problems. hemipteroid insects are known to possess highly reorganized mitochondrial genomes, but in the suborder heteroptera (insecta: hemiptera), there was only one complete mitochondrial genome sequenced without gene rearrangement and the phylogeny of infraorder pentatomomorpha in heteroptera was still uncertain. | 2008 | 19091056 |
| the complete mitogenome of the chinese bush cricket, gampsocleis gratiosa (orthoptera: tettigonioidea). | the complete mitochondrial genome (mitogenome) of gampsocleis gratiosa was determined. the 15,929 bp in the size of g. gratiosa mitogenome contains a typical gene content, base composition, and codon usage found in metazoan. all 13 protein coding genes (pcgs) of the g. gratiosa mitogenome start with a typical atn codon. the usual termination codons (taa and tag) were found from 10 pcgs. however, the atp6, nad4, and nad5 had incomplete termination codon (t). the anticodons of all trnas are identi ... | 2008 | 18571122 |
| variation of success of leptopilina boulardi in drosophila yakuba: the mechanisms explored. | despite an increasing knowledge of insect immune defences and virulence strategies used by parasitoids to escape them, the mechanisms underlying variation of success between parasitoid strains are still poorly understood. we have investigated this point using two lines of the parasitoid wasp leptopilina boulardi that differ in virulence towards drosophila yakuba. by injecting oil drops in d. yakuba larvae parasitized by virulent is(y) females and then dissecting the larvae at different times fol ... | 2008 | 18061668 |
| evidence for de novo evolution of testis-expressed genes in the drosophila yakuba/drosophila erecta clade. | the mutational origin and subsequent evolution of de novo genes, which are hypothesized to be genes of recent origin that are not obviously related to ancestral coding sequence, are poorly understood. however, accumulating evidence suggests that such genes may often function in male reproduction. here we use testis-derived expressed sequence tags (ests) from drosophila yakuba to identify genes that have likely arisen either in d. yakuba or in the d. yakuba/d. erecta ancestor. we found several su ... | 2007 | 17435230 |
| genetic interactions between the parasitoid wasp leptopilina boulardi and its drosophila hosts. | coevolutionary arms races between hosts and parasites would not occur without genetic variation for traits involved in the outcome of parasitism. genetic variations in resistance and virulence have only rarely been described in pairwise host-parasitoid interactions and have never been analysed in multi-species interactions, in contrast to well-characterized plant-pathogen interactions. this paper reports genetic variation in resistance of drosophila yakuba to the parasitoid wasp leptopilina boul ... | 2007 | 17035953 |
| recently evolved genes identified from drosophila yakuba and d. erecta accessory gland expressed sequence tags. | the fraction of the genome associated with male reproduction in drosophila may be unusually dynamic. for example, male reproduction-related genes show higher-than-average rates of protein divergence and gene expression evolution compared to most drosophila genes. drosophila male reproduction may also be enriched for novel genetic functions. our earlier work, based on accessory gland protein genes (acp's) in d. simulans and d. melanogaster, suggested that the melanogaster subgroup acp's may be lo ... | 2006 | 16361246 |
| quantitative trait loci affecting the difference in pigmentation between drosophila yakuba and d. santomea. | using quantitative trait locus (qtl) mapping, we studied the genetic basis of the difference in pigmentation between two sister species of drosophila: drosophila yakuba, which, like other members of the d. melanogaster subgroup, shows heavy black pigmentation on the abdomen of males and females, and d. santomea, an endemic to the african island of são tomé, which has virtually no pigmentation. here we mapped four qtl with large effects on this interspecific difference in pigmentation: two on the ... | 2005 | 15972457 |
| multilocus analysis of introgression between two sympatric sister species of drosophila: drosophila yakuba and d. santomea. | drosophila yakuba is widely distributed in sub-saharan africa, while d. santomea is endemic to the volcanic island of são tomé in the atlantic ocean, 280 km west of gabon. on são tomé, d. yakuba is found mainly in open lowland forests, and d. santomea is restricted to the wet misty forests at higher elevations. at intermediate elevations, the species form a hybrid zone where hybrids occur at a frequency of approximately 1%. to determine the extent of gene flow between these species we studied po ... | 2005 | 15965264 |
| the complete nucleotide sequence and gene organization of the mitochondrial genome of the oriental mole cricket, gryllotalpa orientalis (orthoptera: gryllotalpidae). | the complete nucleotide sequences of the mitochondrial genome (mitogenome) of the oriental mole cricket, gryllotalpa orientalis (orthoptera: gryllotalpidae), were determined. the 15,521-bp-long g. orientalis mitogenome contains typical gene complement, base composition, and codon usage found in metazoan mitogenomes. the g. orientalis mitogenome contains the third lowest a+t content (70.5%) among the complete insects mt genome sequences. the initiation codon for the g. orientalis coi gene appears ... | 2005 | 15950403 |
| insect mitochondrial genomics: the complete mitochondrial genome sequence of the meadow spittlebug philaenus spumarius (hemiptera: auchenorrhyncha: cercopoidae). | we present the complete mitochondrial genome sequence of the meadow spittlebug philaenus spumarius (auchenorrhyncha: cercopoidae). this contribution represents the second mitochondrial genome from the hemiptera and the second of the three hemipteran suborders sampled. the genome is a circular molecule of 16 324 bp with a total a+t content of 77.0% and 76.7% for coding regions only. the gene content, order, and structure are consistent with the drosophila yakuba genome structure (clary and wolste ... | 2005 | 15729396 |
| complete mitochondrial dna sequence of the swimming crab, portunus trituberculatus (crustacea: decapoda: brachyura). | we determined the complete mitochondrial dna sequence for a swimming crab portunus trituberculatus (miers, 1876) (crustacea: decapoda: brachyura). the entire genome was amplified using a long pcr technique, and the products were subsequently used as templates for direct sequencing using a primer walking strategy. the genome (16,026 bp) contained the same 37 genes (two rrnas, 22 trnas, and 13 proteins) plus the putative control region as found in other arthropods. the gene order of p. tritubercul ... | 2003 | 12853147 |
| sequence and organization of the mitochondrial genome of the chagas disease vector, triatoma dimidiata. | the 17 019 bp mitochondrial genome of triatoma dimidiata is composed of thirteen protein coding sequences, twenty-two trnas, small and large ribosomal units, and a control region. the gene order and orientation are identical to that of drosophila yakuba. the nucleotide composition is biased toward adenine and thymine (69.5% a + t). the 2.1 kb putative control region, known as the a + t rich region in most insects, has an a + t bias of 66%, but contains a 400 bp sequence that is 77.5% a + t and t ... | 2001 | 11437912 |
| mitochondrial sequence evolution in spiders: intraspecific variation in trnas lacking the tpsic arm. | analyses of mitochondrial dna sequences from three species of habronattus jumping spiders (chelicerata: arachnida: araneae) reveal unusual inferred trna secondary structures and gene arrangements, providing new information on trna evolution within chelicerate arthropods. sequences from the protein-coding genes nadh dehydrogenase subunit 1 (nd1), cytochrome oxidase subunit i (coi), and subunit ii (coii) were obtained, along with trna, trna, and large-subunit ribosomal rna (16s) sequences; these r ... | 2000 | 10889222 |
| local recombination and mutation effects on molecular evolution in drosophila. | i studied the cause of the significant difference in the synonymous-substitution pattern found in the achaete-scute complex genes in two drosophila lineages, higher codon bias in drosophila yakuba, and lower bias in d. melanogaster. besides these genes, the functionally unrelated yellow gene showed the same substitution pattern, suggesting a region-dependent phenomenon in the x-chromosome telomere. because the numbers of a/t --> g/c substitutions were not significantly different from those of g/ ... | 1999 | 10545459 |
| courtship song rhythms in drosophila yakuba. | we studied the courtship songs of males from several strains of drosophila yakuba. there was clear evidence for two types of pulse songs, generated by the male's wing vibration, which we called 'thud' song and 'clack' song. clack song was generated by both wings, at distances further from the female than the thud component, which was produced by one-wing displays. the carrier frequency of clack song was considerably higher than that of thud, whereas the interpulse intervals (ipi) of thud song, w ... | 1999 | 10049478 |
| the two drosophila telomeric transposable elements have very different patterns of transcription. | the transposable elements het-a and tart constitute the telomeres of drosophila chromosomes. both are non-long terminal repeat (ltr) retrotransposons, sharing the remarkable property of transposing only to chromosome ends. in addition, strong sequence similarity of their gag proteins indicates that these coding regions share a common ancestor. these findings led to the assumption that het-a and tart are closely related. however, we now find that these elements produce quite different sets of tra ... | 1999 | 9858610 |
| reproductive isolation and morphogenetic evolution in drosophila analyzed by breakage of ethological barriers. | this article reports the breaking of ethological barriers through the constitution of soma-germ line chimeras between species of the melanogaster subgroup of drosophila, which are ethologically isolated. female drosophila yakuba and d. teissieri germ cells in a d. melanogaster ovary produced functional oocytes that, when fertilized by d. melanogaster sperm, gave rise to sterile yakuba-melanogaster and teissieri-melanogaster male and female hybrids. however, the erecta-melanogaster and orena-mela ... | 1997 | 9286683 |
| mitochondrial gene arrangement of the horseshoe crab limulus polyphemus l.: conservation of major features among arthropod classes. | numerous complete mitochondrial dna sequences have been determined for species within two arthropod groups, insects and crustaceans, but there are none for a third, the chelicerates. most mitochondrial gene arrangements reported for crustaceans and insect species are identical or nearly identical to that of drosophila yakuba. sequences across 36 of the gene boundaries in the mitochondrial dna (mtdna) of a representative chelicerate. limulus polyphemus l., also reveal an arrangement like that of ... | 1997 | 9254925 |
| partial sequence of the shrimp penaeus notialis mitochondrial genome. | about half of the mitochondrial dna of the shrimp penaeus notialis (crustacea: decapoda) has been cloned (in 2 overlapping fragments of 7.9 kb and 1 kb) and partially sequenced. the gene content and arrangement are identical to that of the homologous domain in drosophila yakuba. intergenic nucleotides are scarce and a 982 bp non-coding sequence exhibit features similar to that of mtdna control regions. the gene organization and the trna structures differentiate the penaeus notialis mitochondrial ... | 1996 | 8881281 |
| partial mitochondrial dna sequence of the crustacean daphnia pulex. | a 3667-base pair (bp) fragment of the mitochondrial genome of the crustacean daphnia pulex has been sequenced and found to contain the complete genes for the small subunit ribosomal rna, nd2, seven trnas and the control region. this organization is identical to that found in drosophila yakuba mtdna yet d. pulex mtdna exhibits several unique features when compared to other mitochondrial sequences. the sequenced fragment is only 62.6% a + t which is much lower than that of any other arthropod mtdn ... | 1994 | 8082168 |
| genome organization and restriction site map of the mitochondrial dna of the housefly (musca domestica). | a restriction map of the housefly mitochondrial dna was constructed. the putative arrangement of the major coding regions was determined by two methods. in the first, drosophila clones of known gene content were hybridized to housefly restriction fragments on southern blots. in the second, rare restriction sites and clusters of restriction sites were used to align the housefly restriction map with that of drosophila yakuba. both methods produced the same apparent gene arrangement. | 1993 | 8514159 |
| insertional mutagenesis in drosophila. ii. p element mediated transformation of drosophila yakuba. | drosophila yakuba, a member of melanogaster subgroup being free of p element, acquired resistance to an antibiotic neomycin by the transformation utilizing p element. in this species, the transformation frequency was comparable to that of d. melanogaster. further, the occurrence of 8 base pairs duplication upon the insertion of the element was confirmed. these facts suggest that the p element could be inserted into the genome in the same manner, even in d. yakuba. any consensus for preferential ... | 1992 | 1338284 |
| aggregation pheromone ofdrosophila mauritiana, drosophila yakuba, anddrosophila rajasekari. | (z)-11-octadecenyl acetate (z11-18∶ac) was identified as the aggregation pheromone ofdrosophila mauritiana, d. yakuba, andd. rajasekari. the amount of pheromone in the ejaculatory bulb of male flies increased with age, reaching plateau levels of ca. 240, 800, and 1100 ng/fly ford. mauritiana, d. yakuba, andd. rajasekari, respectively. thirty to 50% of the pheromone in the ejaculatory bulb was transferred to the female during mating, with the majority transferred to the female's reproductive trac ... | 1989 | 24272009 |
| different mitochondrial gene orders among insects: exchanged trna gene positions in the coii/coiii region between an orthopteran and a dipteran species. | we have cloned and sequenced a 2.65 kb segment of the mtdna molecule of the orthopteran insect locusta migratoria. it harbors the genes for four mitochondrial trnas, for cytochrome c oxidase subunits ii and iii and for atpase subunits 6 and 8. the order of the locust genes resembles that of drosophila yakuba: in both insects the genes for coii and atpase 8 are separated from each other by the genes encoding trna(lys) and trna(asp), but in the locust, the positions of the two trna genes are rever ... | 1988 | 2852067 |
| the gene for the large (16s) ribosomal rna from the locusta migratoria mitochondrial genome. | the nucleotide sequence of a segment of the mtdna molecule of the locust locusta migratoria containing the complete large rrna (16s) gene and some nucleotides in its vicinity has been determined. the gene contains 1314 nucleotides, comprising the smallest metazoan gene reported to date. the gene has a low content of gc (21%) and exhibits an extended sequence homology to the corresponding gene of the dipteran insect drosophila yakuba, suggesting a comparable secondary structure. the gene structur ... | 1987 | 3450412 |
| the mitochondrial dna molecular of drosophila yakuba: nucleotide sequence, gene organization, and genetic code. | the sequence of the 16,019 nucleotide-pair mitochondrial dna (mtdna) molecule of drosophila yakuba is presented. this molecule contains the genes for two rrnas, 22 trnas, six identified proteins [cytochrome b, cytochrome c oxidase subunits i, ii, and iii (coi-iii), and atpase subunits 6 and 8] and seven presumptive proteins (urf1-6 and urf4l). replication originates within a region of 1077 nucleotides that is 92.8% a + t and lacks any open reading frame larger than 123 nucleotides. an equivalent ... | 1985 | 3001325 |
| a cluster of six trna genes in drosophila mitochondrial dna that includes a gene for an unusual trnaseragy. | genes for urf3, trnaala, trnaarg, trnaasn, trnaseragy, trnaglu, trnaphe, and the carboxyl terminal segment of the urf5 gene have been identified within a sequenced segment of the mtdna molecule of drosophila yakuba. the genes occur in the order given. the urf5 and trnaphe genes are transcribed in the same direction as replication while the urf3 and remaining five trna genes are transcribed in the opposite direction. considerable differences exist in the relative arrangement of these genes in d. ... | 1984 | 6324117 |
| the drosophila mitochondrial genome. | the mitochondrial genome of drosophila yakuba is a circular dna molecule of 16019 nucleotide pairs. the sequence contains the genes for two rrna molecules, 22 trna molecules, five known polypeptides (cytochrome b, cytochrome c oxidase subunits i, ii, iii and atpase subunit 6) and eight unidentified polypeptides (urf1, 2, 3, 4l, 4, 5, 6 and a6l). between the trna(ile) and small rrna genes there occurs a sequence of 1077 nucleotides that is 92.8 per cent a + t and lacks reading frames greater than ... | 1984 | 6400770 |
| transfer rna genes in drosophila mitochondrial dna: related 5' flanking sequences and comparisons to mammalian mitochondrial trna genes. | genes for trnagly and trnaserucn have been identified within sequences of mtdna of drosophila yakuba. the trnagly gene lies between the genes for cytochrome c oxidase subunit iii and urf3, and all three of these genes are contained in the same strand of the mtdna molecule. the trnaserucn gene is adjacent to the urf1 gene. these genes are contained in opposite strands of the mtdna molecule and their 3' ends overlap. the structures of the trnagly and trnaserucn genes, and of the four trna genes of ... | 1983 | 6304652 |
| drosophila mitochondrial dna: a novel gene order. | part of the replication origin-containing a+t-rich region of the drosophila yakuba mtdna molecule and segments on either side of this region have been sequenced, and the genes within them identified. the data confirm that the small and large rrna genes lie in tandem adjacent to that side of the a+t-rich region which is replicated first, and establish that a trnaval gene lies between the two rrna genes and that urf1 follows the large rrna gene. the data further establish that the genes for trnail ... | 1982 | 6294611 |
| the complete mitochondrial genomes of three bristletails (insecta: archaeognatha): the paraphyly of machilidae and insights into archaeognathan phylogeny. | the order archaeognatha was an ancient group of hexapoda and was considered as the most primitive of living insects. two extant families (meinertellidae and machilidae) consisted of approximately 500 species. this study determined 3 complete mitochondrial genomes and 2 nearly complete mitochondrial genome sequences of the bristletail. the size of the 5 mitochondrial genome sequences of bristletail were relatively modest, containing 13 protein-coding genes (pcgs), 2 ribosomal rna (rrna) genes, 22 ... | 2015 | 25635855 |
| landscape and evolution of tissue-specific alternative polyadenylation across drosophila species. | drosophila melanogaster has one of best-described transcriptomes of any multicellular organism. nevertheless, the paucity of 3'-sequencing data in this species precludes comprehensive assessment of alternative polyadenylation (apa), which is subject to broad tissue-specific control. | 2017 | 29191225 |
| the role of species-specific sensory cues in male responses to mating rivals in drosophila melanogaster fruitflies. | complex sets of cues can be important in recognizing and responding to conspecific mating competitors and avoiding potentially costly heterospecific competitive interactions. within drosophila melanogaster, males can detect sensory inputs from conspecifics to assess the level of competition. they respond to rivals by significantly extending mating duration and gain significant fitness benefits from doing so. here, we tested the idea that the multiple sensory cues used by d. melanogaster males to ... | 2017 | 29187965 |
| the first two mitochondrial genomes from taeniopterygidae (insecta: plecoptera): structural features and phylogenetic implications. | the complete mitochondrial genomes (mitogenomes) of taeniopteryx ugola and doddsia occidentalis (plecoptera: taeniopterygidae) were firstly sequenced from the family taeniopterygidae. the 15,353-bp long mitogenome of t. ugola and the 16,020-bp long mitogenome of d. occidentalis each contained 37 genes including 13 protein-coding genes (pcgs), 22 transfer rna genes (trnas), two ribosomal rna genes (rrnas) and a control region (cr). the mitochondrial gene arrangement of the two taeniopterygids and ... | 2017 | 29292150 |
| fine scale mapping of genomic introgressions within the drosophila yakuba clade. | the process of speciation involves populations diverging over time until they are genetically and reproductively isolated. hybridization between nascent species was long thought to directly oppose speciation. however, the amount of interspecific genetic exchange (introgression) mediated by hybridization remains largely unknown, although recent progress in genome sequencing has made measuring introgression more tractable. a natural place to look for individuals with admixed ancestry (indicative o ... | 2017 | 28873409 |
| comparative mitogenomic analysis of aposthonia borneensis and aposthonia japonica (embioptera: oligotomidae) reveals divergent evolution of webspinners. | in this study, we report the complete mitochondrial genome (mitogenome, mtdna) of aposthonia borneensis and compare it with another sequenced webspinner, aposthonia japonica. the a. borneensis mitogenome is smaller than a. japonica, but the size of each gene and the a + t content of protein-coding genes (pcgs) are almost identical in the two mitogenomes. among the pcgs, atp6 shows the highest evolutionary rate and cox1 the lowest. the mtdna map in a. borneensis is similar to drosophila yakuba, b ... | 2017 | 28811619 |
| tandem duplications lead to novel expression patterns through exon shuffling in drosophila yakuba. | one common hypothesis to explain the impacts of tandem duplications is that whole gene duplications commonly produce additive changes in gene expression due to copy number changes. here, we use genome wide rna-seq data from a population sample of drosophila yakuba to test this 'gene dosage' hypothesis. we observe little evidence of expression changes in response to whole transcript duplication capturing 5' and 3' utrs. among whole gene duplications, we observe evidence that dosage sharing across ... | 2017 | 28531189 |