| chance caught on the wing: cis-regulatory evolution and the origin of pigment patterns in drosophila. | the gain, loss or modification of morphological traits is generally associated with changes in gene regulation during development. however, the molecular bases underlying these evolutionary changes have remained elusive. here we identify one of the molecular mechanisms that contributes to the evolutionary gain of a male-specific wing pigmentation spot in drosophila biarmipes, a species closely related to drosophila melanogaster. we show that the evolution of this spot involved modifications of a ... | 2005 | 15690032 |
| an intron loss of dfak gene in species of the drosophila melanogaster subgroup and phylogenetic analysis. | drosophila focal adhesion kinase (dfak) gene is a single-copy nuclear gene. previous study revealed that drosophila melanogaster and drosophila simulans had lost an intron precisely within the tyrosine kinase (tyk) domain of this gene. however, this did not happen in several other drosophila species, including drosophila elegans, drosophila ficusphila, drosophila biarmipes, drosophila jambulina, drosophila prostipennis, drosophila takahashii, and drosophila pseudoobscura. in the current study, h ... | 2009 | 18310070 |
| developmental constraints and convergent evolution in drosophila sex comb formation. | the most complex and diverse secondary sexual character in drosophila is the sex comb (sc), an arrangement of modified bristles on the forelegs of a subclade of male fruit flies. we examined sc formation in six representative nonmodel fruit fly species, in an effort to understand how the variation in comb patterning arises. we first compared sc development in two species with relatively small combs, drosophila takahashii, where the scs remain approximately transverse, and drosophila biarmipes, w ... | 2009 | 19245551 |
| reciprocal functions of the drosophila yellow and ebony proteins in the development and evolution of pigment patterns. | body coloration affects how animals interact with the environment. in insects, the rapid evolution of black and brown melanin patterns suggests that these are adaptive traits. the developmental and molecular mechanisms that generate these pigment patterns are largely unknown. we demonstrate that the regulation and function of the yellow and ebony genes in drosophila melanogaster play crucial roles in this process. the yellow protein is required to produce black melanin, and is expressed in a pat ... | 2002 | 11934851 |
| horizontal transfer of transposons between and within crustaceans and insects. | horizontal transfer of transposable elements (htt) is increasingly appreciated as an important source of genome and species evolution in eukaryotes. however, our understanding of htt dynamics is still poor in eukaryotes because the diversity of species for which whole genome sequences are available is biased and does not reflect the global eukaryote diversity. | 2014 | 24472097 |
| adaptation to new nutritional environments: larval performance, foraging decisions, and adult oviposition choices in drosophila suzukii. | understanding how species adapt to new niches is a central issue in evolutionary ecology. nutrition is vital for the survival of all organisms and impacts species fitness and distribution. while most drosophila species exploit rotting plant parts, some species have diversified to use ripe fruit, allowing earlier colonization. the decomposition of plant material is facilitated by yeast colonization and proliferation. these yeasts serve as the main protein source for drosophila larvae. this dynami ... | 2017 | 28592264 |
| the evolution of olfactory gene families in drosophila and the genomic basis of chemical-ecological adaptation in drosophila suzukii. | how the evolution of olfactory genes correlates with adaption to new ecological niches is still a debated topic. we explored this issue in drosophila suzukii, an emerging model that reproduces on fresh fruit rather than in fermenting substrates like most other drosophila we first annotated the repertoire of odorant receptors (ors), odorant binding proteins (obps), and antennal ionotropic receptors (airs) in the genomes of two strains of d. suzukii and of its close relative drosophila biarmipes w ... | 2016 | 27435796 |
| dim scotopic illumination accelerates the reentrainment following simulated jetlags in a diurnal experimental model, drosophila. | jetlag results from the misalignment between the endogenous circadian timing and the civil timing after a transmeridian flight. efficacy of the dim nocturnal illumination (0.03 lx) in accelerating the reentrainment following simulated jetlags in drosophila biarmipes was examined by subjecting the flies to 24 h light-dark cycles in which the 12 h photophase was at 300 lx for all flies but the scotophase was at 0 and 0.03 lx for the control and experimental flies, respectively. reentrainment was a ... | 2013 | 23802034 |
| influence of photoperiod in accelerating the reentrainment in drosophila. | efficacy of the short photoperiod (spp) and the long photoperiod (lpp) in accelerating the reentrainment was assessed in drosophila biarmipes. the spp accelerated the reentrainment after the phase advance of light-dark (ld) cycles, which was associated with the early activity onset (ψo) and the short period of free-running rhythm (τ). the lpp accelerated the reentrainment after the phase delay of ld cycles, which was associated with the late ψo and the long τ. this study indicates that the photo ... | 2012 | 23130708 |
| bright photophase accelerates re-entrainment after experimental jetlag in drosophila. | the efficacy of bright photophase (bp) in accelerating the re-entrainment of drosophila biarmipes rhythm following 8 h phase advance and delay of light-dark (ld) cycle was examined by subjecting the flies to 24 h ld cycles with dim photophase (dp) at 30 lx and bp at 300 lx. re-entrainment was analysed by using the activity onset, activity offset and the duration of activity. following ld advance or delay, the bp flies re-entrained faster than the dp flies which was attributed to the enhanced zei ... | 2012 | 22684252 |
| mating success of males with and without wing patch in drosophila biarmipes. | some males of d. biarmipes--synonym of d. rajasekari and d. raychaudhuri have a black patch on the wing. the patch extends from the apical margin of wing to the third longitudinal vein. field and laboratory studies have been carried out in d. biarmipes to study role of male's wing patch in mating success. the field study shows that nature favors d. biarmipes males with patch. although males without patch mated, males with patch have higher mating success suggesting the role of wing patch during ... | 2005 | 16235725 |
| ovulation stimulating substances in drosophila biarmipes males: their origin, genetic variation in the response of females, and molecular characterization. | ovulation responses of drosophila biarmipes females to an injection of methanolic extract from conspecific males vary with the strains of females. this strain difference seems to be controlled by a small number of autosomal genes, with low responsiveness being recessive. strangely, all d. biarmipes strains show a high level of ovulation after mating. we pursued the reason for this discrepancy and found that d. biarmipes males produce two different substances with ovulation-inducing activity. one ... | 2008 | 9692238 |
| sex-ratio and mating propensity in drosophila biarmipes. | mating success between purple eye colour mutant and wild type d. biarmipes was observed in elens-wattiaux mating chamber. multiple-, female-, male- and no-choice techniques were used. the values of isolation estimate in different experiments are above one which provides no evidence for preferential mating between females and males of the same type. the comparison of sexual behaviour of mutant and wild flies clearly indicates that wild type males are more successful in mating than mutant males, a ... | 1994 | 7959925 |
| effect of mutation on mating propensity in drosophila biarmipes. | by using multiple-choice technique, mating success between purple eye colour mutant and wild type d. biarmipes was studied in an elens-wattiaux mating chamber. red eyed (wild type) males were more successful in mating than mutant males. however, mutant females were more receptive than wild females. the results suggest that purple eye colour mutation affects mating propensity in d. biarmipes. | 1993 | 8112770 |