| evolution of mating isolation between populations of drosophila ananassae. | prezygotic mating isolation has been a major interest of evolutionary biologists during the past several decades because it is likely to represent one of the first stages in the transition from populations to species. mate discrimination is one of the most commonly measured forms of prezygotic isolation and appears to be relatively common among closely related species. in some cases, it has been used as a measure to distinguish populations from subspecies, races, and sister species, yet the infl ... | 2008 | 18466237 |
| fluctuating asymmetry in hybrids of sibling species, drosophila ananassae and drosophila pallidosa, is trait and sex specific. | due to inconsistent results of the empirical studies, the relationship between fluctuating asymmetry (fa, a measure of developmental stability) and interspecific hybridization has been the subject of intense debates. in the present study, we have assessed the impact of interspecific hybridization between 2 sibling species of drosophila: drosophila ananassae and drosophila pallidosa on the levels of fa over 3 generations. trait size of different morphological traits, namely, sternopleural bristle ... | 2009 | 18974399 |
| genetic analysis of female mating recognition between drosophila ananassae and drosophila pallidosa: application of interspecific mosaic genome lines. | drosophila ananassae and drosophila pallidosa are closely related species that can produce viable and fertile hybrids of both sexes, although strong sexual isolation exists between the two species. females are thought to discriminate conspecific from heterospecific males based on their courtship songs. the genetic basis of female discrimination behavior was analyzed using isogenic females from interspecific mosaic genome lines that carry homozygous recombinant chromosomes. multiple regression an ... | 2008 | 17768595 |
| twin intromittent organs of drosophila for traumatic insemination. | in several animals, male genitalia create insemination wounds in areas outside the genital orifice of females. i report that such traumatic insemination (ti) occurs in the drosophila bipectinata complex (diptera: drosophilidae) and illustrate a previously unknown evolutionary pathway for this behaviour. flash fixation of mating pairs revealed the dual function of the paired claw-like basal processes, previously misidentified as a bifid aedeagus: (i) penetration of the female body wall near the g ... | 2007 | 17519186 |
| establishing interspecific mosaic genome lines between drosophila ananassae and drosophila pallidosa by means of parthenogenesis. | strong sexual isolation exists between the closely related species drosophila ananassae and d. pallidosa, but there is no obvious post-mating isolation; both sexes of the hybrids and their descendants appear to be completely viable and fertile. strains exhibiting parthenogenesis have been derived from wild populations of both species. we intercrossed such strains and established iso-female lines after the second generation of parthenogenesis. these lines are clones, carrying homozygous chromosom ... | 2006 | 17014740 |
| genetics of sexual isolation based on courtship song between two sympatric species: drosophila ananassae and d. pallidosa. | sexual isolation has been considered one of the primary causes of speciation and its genetic study has the potential to reveal the genetics of speciation. in drosophila, the importance of courtship songs in sexual isolation between closely related species has been well investigated, but studies analysing the genetic basis of the difference in the courtship songs associated with sexual isolation are less well documented. drosophila ananassae and drosophila pallidosa are useful for studies of sexu ... | 2002 | 12555781 |
| a locus for female discrimination behavior causing sexual isolation in drosophila. | the genetic basis of sexual isolation that contributes to speciation is one of the unsolved questions in evolutionary biology. drosophila ananassae and drosophila pallidosa are closely related, and postmating isolation has not developed between them. however, females of both species discriminate their mating partners, and this discrimination contributes to strong sexual isolation between them. by using surgical treatments, we demonstrate that male courtship songs play a dominant role in female m ... | 2001 | 11390998 |
| on the ethological differentiation of drosophila ananassae and drosophila pallidosa in samoa. | | 1973 | 28564922 |
| drosophila pallidosa: whether a separate species or a light form of d. ananassae. | drosophila pallidosa belongs to the d. ananassae complex, which includes a total of 10 species. earlier d. pallidosa was known as light form of d. ananassae but later it was described as a new species, sibling of d. ananassae. both these terms, light form and sibling species were used by futch. this makes the taxonomic status of d. pallidosa confusing. in this review we have tried to understand the actual status of this sibling species pair. considering the similarities and dissimilarities, we s ... | 2017 | 29321367 |
| (z,z)-5,27-tritriacontadiene: major sex pheromone ofdrosophila pallidosa (diptera; drosophilidae). | a crude cuticular extract from both sexes of 3660 fruit flies (drosophila pallidosa) was subjected to sio2 and agno3/sio2 column chromatography, accompanied by bioassay for the sex pheromone activity. after three chromatographic steps, the active fraction was obtained. the main component of the active fraction was determined to be (z,z)-5,27-tritriacontadiene [(z,z)-5,27-c33:2, on the basis of gas-liquid chromatographic analysis, chemical derivatization and gas chromatography-mass spectrometry. ... | 1994 | 24241974 |