Incipient sexual isolation in thenasuta-albomicans complex ofDrosophila: No-choice experiments

Tanuja, M. T.; Ramachandra, Nallur B.; Ranganath, H. A.

doi:10.1007/bf02708982

Cited by 16 publications

(16 citation statements)

References 9 publications

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“…Our result is in stark contradiction to that. Copulation duration has also been used as an indicator of reproductive isolation in speciation studies on several Drosophila species complexes 28–30 . In all the studies, individuals from sister species did mate but, at least in some cases, heterospecific matings had lower copulation duration than conspecific matings.…”

Section: Discussionmentioning

confidence: 99%

Reproductive Isolation through Experimental Manipulation of Sexually Antagonistic Coevolution in Drosophila melanogaster

Syed

Chatterjee

Samant

et al. 2017

Sci Rep

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Promiscuity can drive the evolution of sexual conflict before and after mating occurs. Post mating, the male ejaculate can selfishly manipulate female physiology, leading to a chemical arms race between the sexes. Theory suggests that drift and sexually antagonistic coevolution can cause allopatric populations to evolve different chemical interactions between the sexes, thereby leading to postmating reproductive barriers and speciation. There is, however, little empirical evidence supporting this form of speciation. We tested this theory by creating an experimental evolutionary model of Drosophila melanogaster populations undergoing different levels of interlocus sexual conflict. We found that allopatric populations under elevated sexual conflict show assortative mating, indicating premating reproductive isolation. Further, these allopatric populations also show reduced copulation duration and sperm defense ability when mating happens between individuals across populations compared to that within the same population, indicating postmating prezygotic isolation. Sexual conflict can cause reproductive isolation in allopatric populations through the coevolution of chemical (postmating prezygotic) as well as behavioural (premating) interactions between the sexes. Thus, to our knowledge, we provide the first comprehensive evidence of postmating (as well as premating) reproductive isolation due to sexual conflict.

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Section: Discussionmentioning

confidence: 99%

Reproductive Isolation through Experimental Manipulation of Sexually Antagonistic Coevolution in Drosophila melanogaster

Syed

Chatterjee

Samant

et al. 2017

Sci Rep

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“…Using no‐, female‐, male‐ and multiple‐choice tests, Ramachandra and his colleagues showed a significant departure from random mating between these two species (Ramachandra and Ranganath ; Tanuja et al. ,b). Chang and Tai () reported asymmetric sexual isolation between the two species with more homogamic matings occurring in D. albomicans than in D. nasuta .…”

Section: Discussionmentioning

confidence: 99%

“…In the Ranganath studies (Ramachandra and Ranganath ; Tanuja et al. ,b), a smaller number of flies, that is, one male and two females or two pairs of flies, were put in a mating chamber and observed for 5 h in each trial, and the observation was repeated multiple times for thousands of matings. In the last study (Chang and Tai ), three flies were placed in a small chamber for both female and male choice tests and observed until mating occurred.…”

Section: Discussionmentioning

confidence: 99%

“…() reported random mating, whereas others observed significant sexual isolation (Ramachandra and Ranganath ; Tanuja et al. ; Chang and Tai ). In addition, Chang and Tai () reported asymmetrical sexual isolation in which more homogamic matings occurred in D. albomicans than in D. nasuta .…”

Section: Introductionmentioning

confidence: 99%

“…; Ramachandra and Ranganath ; Tanuja et al. ; Chang and Tai ), but the conclusions are somewhat inconsistent. Kitagawa et al.…”

Section: Introductionmentioning

confidence: 99%

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Evidence for no sexual isolation between Drosophila albomicans and D. nasuta

Kim¹,

Phillips

Tao

2013

Ecology and Evolution

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Sexual isolation, the reduced tendency to mate, is one of the reproductive barriers that prevent gene flow between different species. Various species-specific signals during courtship contribute to sexual isolation between species. Drosophila albomicans and D. nasuta are closely related species of the nasuta subgroup within the Drosophila immigrans group and are distributed in allopatry. We analyzed mating behavior and courtship as well as cuticular hydrocarbon profiles within and between species. Here, we report that these two species randomly mated with each other. We did not observe any sexual isolation between species or between strains within species by multiple-choice tests. Significant difference in the courtship index was detected between these two species, but males and females of both species showed no discrimination against heterospecific partners. Significant quantitative variations in cuticular hydrocarbons between these two species were also found, but the cuticular hydrocarbons appear to play a negligible role in both courtship and sexual isolation between these two species. In contrast to the evident postzygotic isolation, the lack of sexual isolation between these two species suggests that the evolution of premating isolation may lag behind that of the intergenomic incompatibility, which might be driven by intragenomic conflicts.

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Incipient sexual isolation in thenasuta-albomicans complex ofDrosophila: mating preference in male-, female- and multiple-choice mating experiments

2001

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Interracial divergence is an important facet of speciation. The nasuta-albomicans complex of Drosophila with sixteen morphologically identical, karyotypically different but cross-fertile races is an excellent system to study a few dimensions of raciation. Drosophila nasuta nasuta, Drosophila nasuta albomicans, Cytorace 1, Cytorace 2, Cytorace 3 and Cytorace 4 of this subgroup have been subjected to male-, female- and multiple-choice mating experiments. Out of 8456 crosses conducted, 7185 had successful matings. The overall impression is that mating is far from random amongst these six closely related races of the nasuta-albomicans complex. The males of D. n. albomicans, Cytorace 1 and Cytorace 4 in male-choice, the females of Cytorace 1 and Cytorace 2 in female-choice, and the males and females of D. n. nasuta, D. n. albomicans, Cytorace 1 and Cytorace 4 against the males and females of Cytorace 2 in multiple-choice experiments, had significantly more homogamic matings than expected. Thus in this study of evolutionary experimentation on raciation under laboratory conditions, we have documented the initiation of preference for conspecific matings among closely related and independently evolving members of the nasuta-albomicans complex of Drosophila.

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Incipient sexual isolation in thenasuta-albomicans complex ofDrosophila: No-choice experiments

Cited by 16 publications

References 9 publications

Reproductive Isolation through Experimental Manipulation of Sexually Antagonistic Coevolution in Drosophila melanogaster

Reproductive Isolation through Experimental Manipulation of Sexually Antagonistic Coevolution in Drosophila melanogaster

Evidence for no sexual isolation between Drosophila albomicans and D. nasuta

Incipient sexual isolation in thenasuta-albomicans complex ofDrosophila: mating preference in male-, female- and multiple-choice mating experiments

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