Publications
| Title | Abstract | Year(sorted ascending) Filter | PMID Filter |
|---|
| drosophila euchromatic ltr retrotransposons are much younger than the host species in which they reside. | the recent release of the complete euchromatic genome sequence of drosophila melanogaster offers a unique opportunity to explore the evolutionary history of transposable elements (tes) within the genome of a higher eukaryote. in this report, we describe the annotation and phylogenetic comparison of 178 full-length long terminal repeat (ltr) retrotransposons from the sequenced component of the d. melanogaster genome. we report the characterization of 17 ltr retrotransposon families described prev ... | 0 | 11544196 |
| genetic studies on drosophila simulans. i. introduction. hybrids with drosophila melanogaster. | 1920 | 17245951 | |
| intersexes in drosophila simulans. | 1920 | 17773838 | |
| genetic studies on drosophila simulans. iii. autosomal genes. general discussion. | 1921 | 17245963 | |
| genetic studies on drosophila simulans. ii. sex-linked group of genes. | 1921 | 17245955 | |
| interaction between female and male parts in gynandromorphs of drosophila simulans. | 1931 | 28354041 | |
| the bristles of hybrids between drosophila melanogaster and drosophila simulans. | 1932 | 17246649 | |
| the lack of effect of etherization on the x-ray mutation rate in drosophila simulans. | 1935 | 17246765 | |
| cytologic studies on the abnormal development of the eggs of the claret mutant type of drosophila simulans. | 1936 | 17246793 | |
| the influence of age and sex of the germ cells on the frequency of mutation in drosophila simulans and drosophila melanogaster. | 1937 | 17246834 | |
| the expression of alleles at the cubitus interrupts locus in hybrids between drosophila melanogaster and drosophila simulans. | 1949 | 18131555 | |
| competition between drosophila melanogaster and drosophila simulans: ii. the improvement of competitive ability through selection. | 1952 | 16589182 | |
| pseudotumors and fitness in drosophila melanogaster and drosophila simulans. | 1961 | 13722547 | |
| chromosomal monomorphism in brazilian and argentine populations of drosophila simulans and drosophila repleta. | 1964 | 14239802 | |
| the genetics of an acid phosphatase in drosophila melanogaster and drosophila simulans. | 1966 | 5919327 | |
| unequal proportions of dna complementary to ribosomal rna in males and females of drosophila simulans. | 1966 | 5229971 | |
| an abnormal sex ratio in drosophila simulans. | 1967 | 6035593 | |
| studies on natural populations of drosophila vi. competition between drosophila melanogaster and drosophila simulans. | 1967 | 28556108 | |
| the effects of artificial selection for slow mating in drosophila simulans. i. the behavioural changes. | 1968 | 5639888 | |
| copia expression is variable among natural populations of drosophila. | a survey of copia (retroviral-like element) expression in flies representing 37 populations worldwide of drosophila melanogaster, drosophila simulans and drosophila mauritiana demonstrates that, although copia elements are present in all three species, copia-encoded transcripts are detectable only in d. melanogaster. levels of copia transcripts vary nearly 100-fold among flies representing geographically diverse populations of d. melanogaster and this variation is not correlated with variability ... | 1970 | 1700962 |
| ecological differences and competitive interaction between drosophila melanogaster and drosophila simulans in small laboratory populations. | in interspecific competition studies, some cases of apparent change in competitive ability have been reported. but the change in competitive outcome could equally well be due to character displacement. as a preliminary to studies of the effects of association of d. melanogaster (yellow white mutant strain) and d. simulans (vermilion mutant strain), the nature and extent of ecological differences between them, and the nature of their competitive interaction was studied. differences between the st ... | 1971 | 28313277 |
| differences in the quinacrine staining of the chromosomes of a pair of sibling species: drosophila melanogaster and drosophila simulans. | 1971 | 4106800 | |
| chromosome variation within drosophila simulans detected by quinacrine staining. | 1971 | 4109035 | |
| the effects of artificial selection for slow mating in drosophila simulans. ii. genetic analysis of the slow mating line. | 1971 | 5156614 | |
| a stablizing interaction between the founder effect and interdeme mixing in competing populations of drosophila melanogaster and drosophila simulans. | 1972 | 4622476 | |
| alcohol tolerance: an ecological parameter in the relative success of drosophila melanogaster and drosophila simulans. | laboratory experiments have shown d. melanogaster adults to be more tolerant to alcohol in the environment than d. simulans, with the females being more tolerant than the males of their species. larval development on alcohol supplemented media also demonstrated an increased tolerance by d. melanogaster although the effect was not as clear cut as for the adult survival. oviposition choice experiments demonstrated a marked rejection of alcohol impregnated laying sites by d. simulans when compared ... | 1972 | 28307067 |
| adult population density, fecundity and productivity in drosophila melanogaster and drosophila simulans. | single-species cultures of d. melanogaster oregon-r-c and d. simulans v were set up with 5, 50, 100, 200, 300 or 400 pairs of parents. these parents were discarded after 48 hours, and the numbers and wet weights of emerging progeny recorded twice daily. for each culture, the fitness components estimated were total number of progeny, total progeny biomass, average male and average female wet weights, mean developmental period, and sex ratio. d. melanogaster had higher progeny productivity and lon ... | 1973 | 28307208 |
| dispersal activities of the sibling species drosophila melanogaster and drosophila simulans. | 1973 | 4201482 | |
| studies of a homologous gene-enzyme system, esterase c, in drosophila melanogaster and drosophila simulans. | 1973 | 4197378 | |
| the distribution of vineyard populations of drosophila melanogaster and drosophila simulans during vintage and non-vintage periods. | field studies inside and outside the cellars of the "chateau tahbilk" vineyard have substantiated the distribution data of original collections. d. melanogaster is found inside and outside the cellars while d. simulans is only collected outside. the presence of alcohol fumes in the outside environment during vintage alters the distribution of the species, relative to non-vintage periods, with d. melanogaster being closer to the source. mark-release-recapture experiments suggest that movement by ... | 1974 | 28308614 |
| [comparative study of salivary gland polytene chromosome asynapsis in larvae of drosophila melanogaster, drosophila simulans and their hybrids]. | quantitative comparative study of larvae salivary gland chromosome asynapsis has been performed on 3l arm for sibling species of drosophila melanogaster, d. simulans and their hybrids (d. melanogaster female x d. simulans hermaphrodite). a frequency of asynapsis occurence, an asynapsis localization and distributions of asynapsis terminal points and asynapsis lengths were determined. it is revealed that parent species are very similar as regards to quantitative characteristics studied. for hybrid ... | 1975 | 814050 |
| courtship song and mating speed in hybrids between drosophila melanogaster and drosophila simulans. | courtship song and mating speed of hybrids between drosophila melanogaster and d. simulans were investigated. the courtship song of hybrid males is identical to that of d. simulans, suggesting that x chromosome determination, known from the cross between d. pseudoobscura and d. persimilis, is also possible here. wingbeat frequency of hybrids is intermediate between that of the two parents, demonstrating that courtship song and wingbeat frequency are inherited independently of each other. in mati ... | 1975 | 811205 |
| phototactic responses along a gradient of light intensities for the sibling species drosophila melanogaster and drosophila simulans. | the phototactic responses of four recently collected isofemale strains of drosophila melanogaster and drosophila simulans were measured in a light gradient from 590 to 10 lux. high light intensities were preferred by most flies, but a small proportion of flies preferred the lowest light intensity. based on the strains tested, d. simulans showed greater phototaxis than d. melanogaster, and within each species variability was found. the niche breadth of d. melanogaster appears likely to be greater ... | 1975 | 803833 |
| the pattern of polytene chromosome synapsis in drosophila species and interspecific hybrids. | the pairing of polytene chromosomes was investigated in drosophila melanogaster, drosophila simulans and their hybrids as well as in species of the d. virilis group and in f1 hybrids between the species of this group. the study of frequency and extent of asynapsis revealed non-random distribution along chromosome arms both in interspecific hybrids and pure drosophila species. it is suggested that definite chromosome regions exhibiting high pairing frequency serve as initiation sites of synapsis ... | 1976 | 1001143 |
| genetic analysis of aspartate aminotransferase isozymes from hybrids between drosophila melanogaster and drosophila simulans and mutagen-induced isozyme variants. | the aspartate aminotransferases (designated got1 and got2) are two enzymes of drosophila melanogaster for which naturally occurring electrophoretic variants were not found. there is an electrophoretic difference between d. melanogaster and d. simulans. since the f1 hybrid offspring of these species are sterile, a genetic analysis of the ordinary type cannot be done on differences between the two species. a method was devised to make "partial hybrids" in which one chromosome arm is homozygous for ... | 1976 | 823072 |
| relationships within the melanogaster species subgroup of the genus drosophila (sophophora) i. inversion polymorphisms in drosophila melanogaster and drosophila simulans. | 1976 | 5729 | |
| spontaneous recombination in males of drosophila simulans. | spontaneous recombination in males of drosophila simulans is reported for the first time. both second-chromosome and third-chromosome male recombination was observed in lines that had been captured from natural populations. | 1976 | 1068114 |
| electrophoretic variability in island populations of drosophila simulans and drosophila immigrans. | genetic structure and variability were investigated in several hawaiian populations of d. simulans and d. immigrans. genetic variability is lower in hawaiian populations of d. simulans than in texas populations, and allelic differences exist as well. for d. immigrans, hawaiian and korean populations are similar in variability, allelic content, and gene frequencies. several hypothesis are advanced to account for the patterns in gene variation observed between island and continental populations of ... | 1976 | 184779 |
| genetic analysis of phototactic behavior in drosophila simulans. | phototaxis mazes have been employed to select photopositive and photonegative strains of drosophila simulans. the results suggest that phototactic behavior in d. simulans, as in other drosophila species, is a polygenic trait. hybridization using divergent strains revealed that the genes controlling negative phototactic behavior in d. simulans are autosomal, as opposed to d. melanogaster in which negative phototactic behavior is known to be very strongly sex-linked. | 1977 | 863226 |
| genotype-temperature interaction for longevity in natural populations of drosophila simulans. | 1977 | 604086 | |
| larval reaction to alcohol as an indicator of resource utilization differences between drosophila melanogaster and d. simulans. | newly hatched larvae of drosophila melanogaster derived from southern australian populations (37-38° s) have a strong preference for agar containing alcohol, while larvae of sympatric populations of drosophila simulans show no initial preference. the alcohol preference of a more northern d. melanogaster population (10° s) is lower due to a high level of variability among isofemale strains. this agree with the general principle of decreasing biological diversity with increasing latitude, and is s ... | 1977 | 28309429 |
| behavioral role of the sexcombs in drosophila melanogaster and drosophila simulans. | the sexcombs were amputated from males of three strains of drosophila melanogaster and one strain of d. simulans in order to assess the importance of these structures in the sexual behavior of these species. in d. melanogaster the sexcombs are important in attempts to copulate with the female. their removal delays copulation but does not suppress it entirely. other aspects of courtship are not influenced by removal of the sexcombs. strain differences in quanitative aspects of courtship were foun ... | 1977 | 411471 |
| [role of propionic acid, yeasts and ethyl alcohol in regulating the activity of h-factor in drosophila simulans]. | effects of yeast, propionic acid and ethanol on the activity of h-factor, which sharply increases the frequency of somatic recombination in x-chromosomes of dorsal prothoracal disc cells in drosophila simulans are studied. the frequency of yellow and singed mosaic spots in heterozygous yw ++/++sn1vhd. melanogaster females, inherited h-factor from the father (the stock sn1v) is estimated. the results of the varience analysis have shown that yeast and propionic acid regulate the activity of h-fact ... | 1977 | 355052 |
| the effects of interspecific competition on the dynamics of a polymorphism in an experimental population of drosophila melanogaster. | populations of drosophila melanogaster with a fourth-chromosome polymorphism were subjected to different levels of competition with drosophila simulans. the dynamics of the polymorphism and the equilibrium frequencies of the sparkling allele were seen to depend on the competitive level, while the higher productivity of the competing populations was shown to be due to the initial parental density. the effects of competition on fitness components were quantified by fitting the data to both a two-s ... | 1979 | 17248954 |
| resistance of the sibling species drosophila melanogaster and drosophila simulans to high temperatures in relation to humidity: evolutionary implications. | 1979 | 28568073 | |
| ultrastructural studies on spermatogenesis in a sex-ratio-mutant strain of drosophila simulans. | the aberrant sex-ratio mutation in d. simulans used for this study is a temperature-sensitive autosomal recessive. homozygous males raised at 16 degrees c produce about 2% of f1, but those raised at 26 degrees c, have a normal sex ratio. ultrastructural studies of spermatogenesis have revealed many anomalies in the germ cells of flies raised at 16 degrees c, but the same flies raised at 26 degrees c had few anomalies. the earliest spermatogenic stage with noticeable abnormalities was the primary ... | 1980 | 7405869 |
| genetic analysis of drosophila vitellogenesis: a molecular weight variant of yolk polypeptide-2 in drosophila simulans. | 1980 | 6930533 | |
| origin and direction of replication in mitochondrial dna molecules from the genus drosophila. | mitochondrial dna (mtdna) obtained from ovaries of drosophila simulans, d. mauritiana, d. takahashii, d. yakuba and d. virilis was examined by electron microscopy. from a consideration of the structural properties of replicative intermediates, it was concluded that in mtdna molecules of each species, synthesis on one strand can be up to 97% complete before synthesis on the complementary strand is initiated. mtdna molecules of each species contain a single a+t-rich region which shows species-spec ... | 1980 | 6253922 |
| localization of the ribosomal rna genes in drosophila simulans. | in situ hybridization of cloned rrna genes from drosophila melanogaster to d. simulans metaphase chromosomes shows that in the tested wild type strains both sex chromosomes contain a nucleolus organizer region. silver grain counts support the published data that the x chromosomal rrna gene number is significantly higher than the y chromosomal. | 1980 | 6772417 |
| analysis of courtship sequences of the hybrids between drosophila melanogaster and drosophila simulans. | several transitions between sequential male courtship elements were analyzed for drosophila melanogaster, its close relative d. simulans, and two types of hybrid males. hybrid males from special reciprocal crosses did not differ. while d. melanogaster and d. simulans males differed markedly for the majority of transitions studied, hybrid males showed no consistent pattern with the parent species, being indistinguishable from d. simulans males, indistinguishable from d. melanogaster, or intermedi ... | 1980 | 6779788 |
| purification and enzyme stability of alcohol dehydrogenase from drosophila simulans, drosophila virilis and drosophila melanogaster adhs. | three alcohol dehydrogenases from drosophila simulans, drosophila virillis and drosophila melanogaster adhs (which possesses an alloenzyme with slow electrophoretic mobility) were purified essentially to homogeneity. the purification procedure involves a new step of affinity chromatography, which efficiently lowers the amount of contaminants in the final preparation, producing a very stable enzyme. the purification procedure developed consists of a salmine sulphate precipitation, two cm-sepharos ... | 1980 | 6779810 |
| intraspecific diversity of nucleotide sequences within the adenine + thymine-rich region of mitochondrial dna molecules of drosophila mauritiana, drosophila melanogaster and drosophila simulans. | mitochondrial dna (mtdna) molecules from drosophila mauritiana, d. melanogaster, and d. simulans contain a single adenine + thymine (a+t)-rich region, which is similarly located in all molecules, but varies in size among these species. using agarose gel electrophoresis and electron microscopy, a difference in occurrence of one ecori site, and a difference in size (approximately 0.7 kb) of the a+t-rich regions was found between mtdna molecules of flies of two female lines of d. mauritiana. in het ... | 1980 | 6258143 |
| genetic variability at the esterase-6 locus in natural populations of drosophila simulans in relation to environmental heterogeneity. | the allozymic variation at at the esterase-6 locus examined in fourteen samples of natural populations of drosophila simulans collected in two different localities. the samples were collected from different species of fruits in the two localities and from banana baits located some meters apart from the fruits. the analysis was done by sequential electrophoresis, using varied gel concentrations and buffers. by this technique, we detected 27 alleles at the esterase-6 locus, where only five alleles ... | 1981 | 7327390 |
| determination of some biochemical and structural features of alcohol dehydrogenases from drosophila simulans and drosophila virilis. comparison of their properties with the drosophila melanogaster adhs enzyme. | the biochemical properties of the enzyme alcohol dehydrogenase of two different drosophila species, drosophila simulans and drosophila virilis, were studied and compared with those of drosophila melanogaster adhs enzyme. all of them consist of two identical subunits of molecular weight 27800 and share significant similarities in function. the substrate specificities of these enzymes were characterized and km(app.) and vmax.(app.) values were calculated. all these alcohol dehydrogenases show grea ... | 1981 | 6796069 |
| comparative studies of allozyme loci in drosophila simulans and drosophila melanogaster. i. three dipeptidase loci. | genetic variation at three dipeptidase loci (dip-a, dip-b, and dip-c) in drosophila simulans was analyzed by starch gel electrophoresis. dip-a was found to be polymorphic in four populations, while dip-b and dip-c were found to be polymorphic in one. the numbers of different alleles found at each respective locus were: dip-a, two; dip-b, two; and dip-c, three. dip-a was genetically mapped at 57.9 on the second chromosome, and dip-b and dip-c at 80.9 and 87.9 on the third chromosome, respectively ... | 1981 | 6784720 |
| hybrid sterility in drosophila simulans: relationships with the hybrid dysgenesis syndrome in drosophila melanogaster. | 1981 | 6790477 | |
| effects of female behavior on wing display and courtship of male drosophila simulans and drosophila melanogaster. | corrolations between female rejection behaviors and male wing display were calculated for both drosophila simulans and drosophila melanogaster intraspicific pair-matings. no significant correlations were found for d. melanogaster, but in d. simulans flicking by the female appeared to be associated with a shift in male wing display pattern resulting in higher levels of vibration. flicking did not appear to discourage courtship by males in either species. | 1981 | 24925614 |
| light-dependent pupation site preferences in drosophila. ii. drosophila melanogaster and drosophila simulans. | drosophila melanogaster prefers to pupate in the dark, while its sibling species, d. simulans, prefers the light when the species are tested in isolation and when cultured and tested together. reciprocal interspecific hybridizations were carried out and the f1 individuals were tested. progeny from the cross of d. melanogaster females with d. simulans males chose pupations sites exactly intermediate between those of the two parental species, while the reciprocal-cross offspring preferred light pu ... | 1981 | 6803758 |
| the satellite dnas of drosophila simulans. | 1981 | 7333458 | |
| genes affecting courtship song and mating preference in drosophila melanogaster, drosophila simulans and their hybrids. | 1981 | 28563392 | |
| genetic distance in the sibling species drosophila melanogaster, drosophila simulans and drosophila mauritiana. | 1982 | 28568044 | |
| artificial selection for altered male wing display in drosophila simulans. | 1982 | 7138454 | |
| estimation of genetic variability in natural populations of drosophila simulans by two-dimensional and starch gel electrophoresis. | genic variation in natural populations of drosophila simulans was surveyed using allozymic and two-dimensional electrophoretic techniques. consistent with some previous reports, allozymic heterozygosity appeared lower than in the sibling species d. melanogaster (0.07 vs. 0.16). no variation was detected by two-dimensional electrophoresis of 19 lines scored for 70 abundant proteins. this is consistent with reported reductions in estimates of genic heterozygosity by two-dimensional electrophoresis ... | 1982 | 7095420 |
| crossing-over in the female hybrids between drosophila simulans and drosophila mauritiana. | the cross between d. simulans and d. mauritiana yields fertile hybrid females. crossing-over occurs in such female hybrids. this system allows the transfer of pieces of chromosomes from one species into another, thus providing an experimental tool to analyze the genetic basis of evolutionary problems, as well as the regulation of gene expression during development. | 1982 | 7200915 |
| meiosis and early cleavage in drosophila melanogaster eggs: effects of the claret-non-disjunctional mutation. | the claret-non-disjunctional (cand) mutation is a female-specific mutation in drosophila melanogaster, which causes a high frequency of mortality (89--90%) in eggs laid by the homozygous females. among the progeny that survive to the adult stage, greater than 50% are aneuploid and/or mosaic for the x and number 4 chromosomes. the genetic studies of cand indicate that it is homologous to the claret mutation (ca-simulans) in drosophila simulans. the cytological effect of the cand mutation on meios ... | 1983 | 6413518 |
| interspecific competition between drosophila melanogaster and drosophila simulans: temperature effect on competitive ability and fitness components. | 1983 | 22879131 | |
| pupation site selection in drosophila simulans. | 1983 | 6838459 | |
| preadult competition between colonizing populations of drosophila subobscura and established populations of drosophila simulans in chile. | the palearctic species drosophila subobscura was detected for the first time in chile and probably in the americas in 1978. at present, its distribution area extends between 29°54's and 53°40's, where it has become abundant in both domestic and wild environments, depending on the latitude and the season of the year (appearing at maximum frequency in early spring). the seasonal fluctuations of d. subobscura are the inverse of those of d. simulans, which shares the same habitat in certain regions. ... | 1983 | 28310659 |
| temperature effects on life history variation in drosophila simulans. | 1983 | 28556002 | |
| nucleotide sequence comparison of the adh gene in three drosophilids. | the alcohol dehydrogenase (adh) gene has been isolated from drosophila simulans and d. mauritiana by screening lambda clone libraries of each with a previously cloned adh gene from d. melanogaster. the isolated lambda clones were subcloned and partially sequenced to determine the relatedness of these species and to examine details of evolutionary change in the structure of the adh gene. we report the sequence of the first 704 nucleotides of each gene as well as 127 bases in the 5' untranslated r ... | 1984 | 6429340 |
| interspecific dna transformation in drosophila. | a dna fragment that includes the wild-type rosy (ry+) gene of drosophila melanogaster has been introduced by microinjection into the germ line of the reproductively isolated species drosophila simulans and incorporated into the d. simulans genome. transformation was mediated by the transposable element p, which occurs in the genome of most natural populations of d. melanogaster but not in d. simulans. rubin and spradling [rubin, g.m. & spradling, a.c. (1982) science 218, 348-353] have previously ... | 1984 | 6095302 |
| olfactory responses to alcohols by adults of sympatric populations of drosophila melanogaster and drosophila simulans. | 1984 | 6435598 | |
| regulatory gene evolution: adaptive differences in expression of alcohol dehydrogenase in drosophila melanogaster and drosophila simulans. | in drosophila melanogaster x d. simulans hybrids, the alcohol dehydrogenase (adh) electromorphs characteristic of the two parents display tissue- and stage-specific differences in relative level of expression. this implies distinct cis-acting regulatory elements associated with the respective adh alleles. these cis-acting elements account in part, but not completely, for markedly different overall patterns of adh expression in the two species. the regulatory patterns seem to be adaptively signif ... | 1984 | 6429088 |
| the 5s ribosomal genes in the drosophila melanogaster species subgroup. nucleotide sequence of a 5s unit from drosophila simulans and drosophila teissieri. | the 5s genes of the eight species of the d. melanogaster subgroup have been mapped. the spacers, in contrast with coding regions, differ markedly between most species. one 5s gene unit has been sequenced for both d. simulans and d. teissieri. the mature 5s rna region in these two species is identical to the corresponding region of d. melanogaster. only 5 nucleotide variations occur between the d. melanogaster and d. simulans 5s gene spacers. the spacer in d. teissieri is very different. only two ... | 1984 | 6320111 |
| genetic basis of male sterility in hybrids between two closely related species of drosophila. | drosophila simulans and drosophila mauritiana are closely related sibling species, the former cosmopolitan and the latter restricted to the small oceanic island of mauritius. genetic analysis of male sterility in hybrids between these species shows that at least five loci (one on each chromosome arm) are responsible for this reproductive isolation. this is the most loci that could have been detected with the techniques used and implies that the true genetic divergence for sterility is even great ... | 1984 | 6589604 |
| molecular analysis of p element behavior in drosophila simulans transformants. | in this report we describe the successful transformation of drosophila simulans with an autonomous p element from drosophila melanogaster without the use of a selectable marker. this result demonstrates that there is no species barrier for p element transposition. utilizing gel blotting and in situ hybridization techniques, we have monitored the behavior of newly-introduced p elements in several d. simulans transformed lines over twelve generations. in most instances, an overall increase in the ... | 1985 | 2993820 |
| enzymatic and quantitative variation in european and african populations of drosophila simulans. | allozyme polymorphism at 15 loci of d. simulans was studied in 7 natural populations from europe, north and tropical africa. morphological traits were studied in nine european and eleven afrotropical strains. within a population, the biochemical polymorphisms of drosophila simulans and its sibling drosophila melanogaster are not very different, although d. simulans has a lower heterozygosity. between-populations genetic differentiation is however much lower in d. simulans than in d. melanogaster ... | 1985 | 4008274 |
| a further characterization of drosophila cuticular monoenes using a mass spectrometry method to localize double bonds in complex mixtures. | positions of double bonds of olefins of complex mixtures, such as those of drosophila cuticular hydrocarbons, have been determined using a simple method combining methoxymercuration-demercuration of extracts and analysis by gas chromatography-mass spectrometry using ammonia for chemical ionization. chemical similarities between cuticular monoenes of both sexes of drosophila simulans and males of drosophila melanogaster are specified: the major isomer is always in position 7. | 1985 | 3923860 |
| oviposition site selection by drosophila melanogaster and drosophila simulans. | the effects of texture and larval residues in the medium on oviposition site selection (oss) by drosophila melanogaster and drosophila simulans were studied. drosophila melanogaster laid over 95% of its eggs in sieved medium (vs. unsieved medium); d. simulans laid all of its eggs in sieved medium. surgical removal of antennal segments, and of fore-, mid-, or hindtarsi did not affect this result, indicating that sense organs involved in discriminating between sieved and unsieved medium are not co ... | 1985 | 28561364 |
| effects of parental photoperiod regime on progeny development time in drosophila simulans. | 1986 | 28556320 | |
| evolutionary genetics of two sibling species, drosophila simulans and d. sechellia. | drosophila simulans and d. sechellia are sibling species, the former cosmopolitan and the latter restricted to the seychelles islands. we used classical genetic analysis to measure the numbers and effects of genes responsible for reproductive isolation and morphological differences in male genitalia between these species. at least five loci are responsible for male sterility in hybrids, with the strongest effects produced by at least two genes on the x chromosome. at least three (and probably fo ... | 1986 | 28556167 |
| unidirectional incompatibility between populations of drosophila simulans. | drosophila simulans females from a strain collected at watsonville, ca produce very few offspring when mated with males from a strain collected at riverside 510 km away. this incompatibility does not exist in the reciprocal cross. in the incompatible cross, mating and oviposition are normal, but eggs fail to hatch. a survey of other california populations indicates that unidirectional incompatibility is widespread. the incompatibility is maternally inherited over one generation. using older rive ... | 1986 | 28556160 |
| race formation, speciation, and introgression within drosophila simulans, d. mauritiana, and d. sechellia inferred from mitochondrial dna analysis. | mitochondrial dna cleavage maps from three chromosomally homosequential species drosophila simulans, d. mauritiana, and d. sechellia, were established for 12 restriction enzymes. one isofemale strain was studied in d. sechellia (se), 13 in d. simulans, and 17 in d. mauritiana: in the last two species, respectively, three (sii, ii, and iii) and two (mai and ii) cleavage morphs were found. the evolutionary relationships based on mtdna cleavage map comparisons show that the mai and se mtdnas are in ... | 1986 | 28556334 |
| nucleotide sequence of a retrotransposon 297 isolated from drosophila simulans. | 1986 | 3025817 | |
| location of an x-linked factor causing sterility in male hybrids of drosophila simulans and d. mauritiana. | we report the first mapping of a genetic factor responsible for reproductive isolation: a small segment of genome strongly affecting sperm motility in hybrids between the sibling species drosophila simulans and d. mauritiana. maximum-likelihood analysis of data from ten generations of backcrossing places this factor at 1.1 +/- 0.2 map units from the forked locus, at position 54.9 +/- 0.2 or 57.1 +/- 0.2 on the x chromosome. | 1986 | 3781872 |
| endemic microorganisms of a drosophila simulans strain and their relationships with the non-mendelian transmission of a character. | 1986 | 22879238 | |
| interspecific genetic control of courtship song production and reception in drosophila. | the genetic control of courtship song differences between drosophila melanogaster and drosophila simulans males was investigated by producing hybrids from reciprocal crosses. the song rhythm difference between the parental species appears to be due to sex-linked genes, whereas the basic interpulse-interval difference is autosomally inherited. hybrid females show selective preferences for artificially generated songs carrying intermediate "hybrid" characteristics. | 1986 | 3083506 |
| variable outcome in competition experiments between drosophila melanogaster and drosophila simulans. | 1986 | 22879228 | |
| physiological significance of the alcohol dehydrogenase polymorphism in larvae of drosophila. | this study deals with biochemical and metabolic-physiological aspects of the relationship between variation in in vivo alcohol dehydrogenase activity and fitness in larvae homozygous for the alleles adh71k, adhf, adhs, of drosophila melanogaster, and for the common adh allele of drosophila simulans. the adh genotypes differ in the maximum oxidation rates of propan-2-ol into acetone in vivo. there are smaller differences between the adh genotypes in rates of ethanol elimination. rates of accumula ... | 1987 | 3117619 |
| a comprehensive study of genic variation in natural populations of drosophila melanogaster. iii. variations in genetic structure and their causes between drosophila melanogaster and its sibling species drosophila simulans. | the natural populations of drosophila melanogaster and drosophila simulans were compared for their genetic structure. a total of 114 gene-protein loci were studied in four mainland (from europe and africa) and an island (seychelle) populations of d. simulans and the results were compared with those obtained on the same set of homologous loci in fifteen worldwide populations of d. melanogaster. the main results are as follows: (1) d. melanogaster shows a significantly higher proportion of loci po ... | 1987 | 17246411 |
| the spontaneous mutation rate in drosophila simulans. | the purpose of this investigation was to determine whether there exists a correlation in drosophila between the spontaneous mutation rate and the amount of dispersed middle repetitive (mobile) dna sequences. the amount of these sequences is 7 times less in drosophila simulans as compared to drosophila melanogaster. therefore, if a correlation exists, the spontaneous mutation rate in drosophila simulans should be 7 times lower than that in drosophila melanogaster. we isolated an x-chromosome inve ... | 1987 | 2825010 |
| extensive microheterogeneity of serine trna genes from drosophila melanogaster. | the nucleotide sequences of nine genes corresponding to trna(ser)4 or trna(ser)7 of drosophila melanogaster were determined. eight of the genes compose the major trna(ser)4,7 cluster at 12de on the x chromosome, while the other is from 23e on the left arm of chromosome 2. among the eight x-linked genes, five different, interrelated, classes of sequence were found. four of the eight genes correspond to trna(ser)4 and trna(ser)7 (which are 96% homologous), two appear to result from single crossove ... | 1987 | 3126300 |
| insertional dna and spontaneous mutation at the white locus in drosophila simulans. | a large body of data on molecular analyses of several multiallelic loci in drosophila melanogaster has demonstrated a high incidence of mobile dna element insertions among spontaneous mutations. in the sibling species d. simulans, the dispersed, middle repetitive, nomadic sequences are reduced to about one-seventh that of its sibling species (dowsett and young 1982). does this reduced amount of middle repetitive dna (or mobile dna sequences) mean that in d. simulans the occurrence of insertion m ... | 1987 | 17186619 |
| identical satellite dna sequences in sibling species of drosophila. | the evolution of simple satellite dnas was examined by dna-dna hybridization of ten drosophila melanogaster satellite sequences to dnas of the sibling species, drosophila simulans and drosophila erecta. seven of these repeat types are present in tandem arrays in d. simulans and each of the ten sequences is repeated in d. erecta. in thermal melts, six of the seven satellite sequences in d. simulans and seven of the ten sequences in d. erecta melted within 1 deg.c of the corresponding values in d. ... | 1987 | 3112413 |
| contrasting patterns of geographic variation in the cosmopolitan sibling species drosophila melanogaster and drosophila simulans. | an electrophoretic study was carried out to compare the geographic pattern of genetic variation in drosophila simulans with that of its sibling species, drosophila melanogaster. an identical set of 32 gene-protein loci was studied in four geographically distant populations of d. simulans and two populations of d. melanogaster, all originating from europe and africa. the comparison yielded the following results: tropical populations of d. simulans were, in terms of the number of unique alleles, a ... | 1987 | 3107542 |
| sexual isolation between drosophila melanogaster females and drosophila simulans males. i - relation between homospecific and heterospecific mating success. | 1987 | 22879269 | |
| linkage disequilibrium in experimental populations of drosophila simulans: a test of the random drift hypothesis. | 1987 | 3443289 | |
| courtship behavior and the kinetics of mating in three lines of drosophila simulans and their hybrids. | 1987 | 3606537 | |
| organization and evolution of the alcohol dehydrogenase gene in drosophila. | the alcohol dehydrogenase (adh) gene was isolated from drosophila simulans and d. mauritiana, and the dna sequence of a 4.6-kb region, containing the structural gene and flanking sequence, was determined for each. these sequences were compared with the adh region of d. melanogaster to characterize changes that occur in the drosophila genome during evolution and to identify conserved sequences of functional importance. drosophila simulans and d. mauritiana adh are organized in a manner similar to ... | 1988 | 3367783 |
| linkage disequilibrium between enzymatic loci in natural populations of drosophila simulans. | 1988 | 22879302 |