scholarly journals No evidence that experimental manipulation of sexual conflict drives premating reproductive isolation in Drosophila melanogaster

2006 ◽  
Vol 19 (4) ◽  
pp. 1033-1039 ◽  
Author(s):  
S. WIGBY ◽  
T. CHAPMAN
Keyword(s):  
Drosophila Melanogaster ◽  
Reproductive Isolation ◽  
Sexual Conflict ◽  
Experimental Manipulation

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

2016 ◽  
Author(s):  
Syed Zeeshan Ali ◽  
Martik Chatterjee ◽  
Manas Arun Samant ◽  
Nagaraj Guru Prasad
Keyword(s):  
Drosophila Melanogaster ◽  
Reproductive Isolation ◽  
Sexual Conflict ◽  
Evolutionary Model ◽  
Experimental Manipulation ◽  
Allopatric Populations ◽  
Antagonistic Coevolution ◽  
Before And After ◽  
Postmating Prezygotic Isolation ◽  
Sexually Antagonistic Coevolution

AbstractPromiscuity 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 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) interaction 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.

scholarly journals Sexual conflict and reproductive isolation in flies

2009 ◽  
Vol 5 (5) ◽  
pp. 697-699 ◽  
Author(s):  
D.J. Hosken ◽  
O.Y. Martin ◽  
S. Wigby ◽  
T. Chapman ◽  
D.J. Hodgson
Keyword(s):  
Drosophila Melanogaster ◽  
Reproductive Isolation ◽  
Sexual Conflict ◽  
Experimental Evolution ◽  
Empirical Support ◽  
Isolation Index

Sexual conflict is predicted to generate more rapid reproductive isolation between larger populations. While there is some empirical support for this, the data are inconsistent and, additionally, there has been criticism of some of the evidence. Here we reanalyse two experimental-evolution datasets using an isolation index widely applied in the speciation literature. We find evidence for reproductive isolation through sexual conflict in Sepsis cynipsea , but not in Drosophila melanogaster , and this occurred to a greater degree in larger populations, which is consistent with previous findings.

scholarly journals Cuticular hydrocarbon divergence in Drosophila melanogaster populations evolving under differential operational sex ratios

2018 ◽  
Author(s):  
Rochishnu Dutta ◽  
Tejinder Singh Chechi ◽  
Ankit Yadav ◽  
Nagaraj Guru Prasad
Keyword(s):  
Drosophila Melanogaster ◽  
Reproductive Isolation ◽  
Cuticular Hydrocarbons ◽  
Sexual Conflict ◽  
Cuticular Hydrocarbon ◽  
Mate Recognition ◽  
Mate Preference ◽  
Sexually Dimorphic ◽  
Cuticular Hydrocarbon Profile ◽  
Buridan’S Ass

AbstractThe ability of interlocus sexual conflict to facilitate reproductive isolation is widely anticipated. However, very few experimental evolutionary studies have convincingly demonstrated the evolution of reproductive isolation due to sexual conflict. Recently a study on replicate populations of Drosophila melanogaster under differential sexual conflict found that divergent mate preference evolved among replicate populations under high sexual conflict regime. The precopulatory isolating mechanism underlying such divergent mate preference could be sexual signals such as cuticular hydrocarbons since they evolve rapidly and are involved in D. melanogaster mate recognition. Using D. melanogaster replicates used in the previous study, we investigate whether cuticular hydrocarbon divergence bears signatures of sexually antagonistic coevolution that led to reproductive isolation among replicates of high sexual conflict regime. We found that D. melanogaster cuticular hydrocarbon profiles are sexually dimorphic. Although replicate populations under high sexual conflict displayed assortative mating, we found no significant differences in the cuticular hydrocarbon profile between the high and low sexual conflict regimes. Instead we find cuticular hydrocarbon divergence patterns to be suggestive of the Buridan’s Ass regime which is one of the six possible mechanisms to resolve sexual conflict. Sexual selection that co-vary between populations under high and low sexual conflict regimes may also have contributed to the evolution of cuticular hydrocarbons. This study indicates that population differentiation as a result of cuticular hydrocarbon divergence cannot be credited to sexual conflict despite high sexual conflict regime evolving divergent cuticular hydrocarbon profiles.

Sexual selection affects the evolution of contact pheromones in Drosophila melanogaster populations isolated by differential sexual conflict

2019 ◽  
Author(s):  
Rochishnu Dutta ◽  
Tejinder Singh Chechi ◽  
N. G. Prasad
Keyword(s):  
Drosophila Melanogaster ◽  
Sexual Selection ◽  
Reproductive Isolation ◽  
Sexual Conflict ◽  
Population Differentiation ◽  
Lipid Profiles ◽  
Mate Preference ◽  
Cuticular Lipid ◽  
Antagonistic Coevolution ◽  
Sexually Antagonistic Coevolution

Abstract Background: The ability of sexual conflict to facilitate reproductive isolation is widely anticipated. However, very few experimental evolutionary studies have convincingly demonstrated the evolution of reproductive isolation due to sexual conflict. Recently a study on the replicates of Drosophila melanogaster populations under differential sexual conflict found that divergent mate preference evolved among replicates under high sexual conflict regime. The precopulatory isolating mechanism underlying such divergent mate preference could be sexual signals such as cuticular lipids since they evolve rapidly and are involved in D. melanogaster mate recognition. Using Drosophila melanogaster replicates used in the previous study, we investigate whether cuticular lipid divergence bears signatures of sexually antagonistic coevolution that led to reproductive isolation among replicates of high sexual conflict regime. Results: We found that their cuticular lipid profiles are sexually dimorphic. Although replicates with male biased sex ratio evolved isolation in reproductive traits due to high sexual conflict, the patterns of cuticular lipid divergence in high and low sexual conflict regimes suggest that sexual selection is the dominant selection pressure rather than sexual conflict affecting the cuticular lipid profile. We also find cuticular lipid divergence patterns to be suggestive of the Buridan’s Ass regime which is one of the six possible mechanism to resolve sexual conflict. Conclusions: Although reproductive isolation due to sexual conflict is anticipated, evolution of a sexually selected trait under sexual conflict may not lead to population differentiation in expected lines. This is because speciation due to sexually antagonistic coevolution is only one of the several outcomes of sexual conflict. This study indicates that population differentiation as a result of cuticular lipid divergence cannot be credited to sexual conflict despite high sexual conflict regime evolving divergent cuticular lipid profiles.

scholarly journals The Reproductive Microbiome: An Emerging Driver of Sexual Selection, Sexual Conflict, Mating Systems, and Reproductive Isolation

2020 ◽  
Vol 35 (3) ◽  
pp. 220-234 ◽  
Author(s):  
Melissah Rowe ◽  
Liisa Veerus ◽  
Pål Trosvik ◽  
Angus Buckling ◽  
Tommaso Pizzari
Keyword(s):  
Sexual Selection ◽  
Reproductive Isolation ◽  
Sexual Conflict ◽  
Mating Systems

The evolution of reproductive isolation through sexual conflict

Nature ◽  
2003 ◽  
Vol 423 (6943) ◽  
pp. 979-982 ◽  
Author(s):  
Oliver Y. Martin ◽  
David J. Hosken
Keyword(s):  
Reproductive Isolation ◽  
Sexual Conflict

scholarly journals Sexual conflict over mating in red-sided garter snakes ( Thamnophis sirtalis ) as indicated by experimental manipulation of genitalia

2014 ◽  
Vol 281 (1774) ◽  
pp. 20132694 ◽  
Author(s):  
Christopher R. Friesen ◽  
Emily J. Uhrig ◽  
Mattie K. Squire ◽  
Robert T. Mason ◽  
Patricia L. R. Brennan
Keyword(s):  
Sexual Conflict ◽  
Wild Population ◽  
Experimental Manipulation ◽  
Copulation Duration ◽  
Thamnophis Sirtalis ◽  
Garter Snakes ◽  
Male And Female ◽  
Complex Interactions ◽  
Basal Spine ◽  
Copulatory Plugs

Sexual conflict over mating can result in sex-specific morphologies and behaviours that allow each sex to exert control over the outcome of reproduction. Genital traits, in particular, are often directly involved in conflict interactions. Via genital manipulation, we experimentally investigated whether genital traits in red-sided garter snakes influence copulation duration and formation of a copulatory plug. The hemipenes of male red-sided garter snakes have a large basal spine that inserts into the female cloaca during mating. We ablated the spine and found that males were still capable of copulation but copulation duration was much shorter and copulatory plugs were smaller than those produced by intact males. We also anaesthetized the female cloacal region and found that anaesthetized females copulated longer than control females, suggesting that female cloacal and vaginal contractions play a role in controlling copulation duration. Both results, combined with known aspects of the breeding biology of red-sided garter snakes, strongly support the idea that sexual conflict is involved in mating interactions in this species. Our results demonstrate the complex interactions among male and female traits generated by coevolutionary processes in a wild population. Such complexity highlights the importance of simultaneous examination of male and female traits.

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