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Female-limited X-chromosome evolution effects on male pre- and post-copulatory success Supplemental information
- Publication Year :
- 2021
- Publisher :
- The Royal Society, 2021.
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Abstract
- Intralocus sexual conflict arises when the expression of shared alleles at a single locus generates opposite fitness effects in each sex (i.e. sexually antagonistic alleles), preventing each sex from reaching its sex-specific optimum. Despite its importance to reproductive success, the relative contribution of intralocus sexual conflict to male pre- and post-copulatory success is not well-understood. Here, we used a female-limited X-chromosome (FLX) evolution experiment to limit the inheritance of the X-chromosome to the matriline, eliminating possible counter-selection in males and allowing the X-chromosome to accumulate female-benefit alleles. After greater than 100 generations of FLX evolution, we studied the effect of the evolved X-chromosome on male attractiveness and sperm competitiveness. We found a non-significant increase in attractiveness and decrease in sperm offense ability in males expressing the evolved X-chromosomes, but a significant increase in their ability to avoid displacement by other males' sperm. This is consistent with a trade-off between these traits, perhaps mediated by differences in body size, causing a small net reduction in overall male fitness in the FLX lines. These results indicate that the X-chromosome in Drosophila melanogaster is subject to selection via intralocus sexual conflict in males.
Details
- Database :
- OpenAIRE
- Accession number :
- edsair.doi.dedup.....57ea1d7cc71e8e72fa2c71a43639fc6c
- Full Text :
- https://doi.org/10.6084/m9.figshare.14053861