Sexually antagonistic coevolution between the sex chromosomes of Drosophila melanogaster

摘要: Antagonistic interactions between the sexes are important drivers of evolutionary divergence. Interlocus sexual conflict is generally described as a alleles at two interacting loci whose identity and genomic location arbitrary, but with opposite fitness effects in each sex. We build on previous theory by suggesting that when under interlocus located sex chromosomes it can lead to cycles antagonistic coevolution them therefore sexes. tested this hypothesis performing experimental crosses using Drosophila melanogaster where we reciprocally exchanged five allopatric wild-type populations round-robin design. Disrupting putatively coevolved chromosome pairs resulted increased male reproductive success 16 20 (10 which were individually significant), also lower offspring egg-to-adult viability affected both female fitness. After 25 generations evolution these sexually appeared be resolved. To formalize our hypothesis, developed population genetic models expressions based empirical results. Our model predictions support conclusion plausible observed experiments. Together, results lend theoretical idea occur illustrate how process, combination autosomal coadaptation, may drive phenotypic divergence populations.