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le jeudi 05 octobre à 11:00

Alison Wright (Dept. of Animal and Plant Sciences, University of Sheffield)

Salle de conférence batiment l’Herbier

par Vincent Daubin - 5 octobre 2017

e resolution of sexual conflict

Males and females are often subject to contrasting selection pressures, and this can generate significant amounts of sexual conflict when traits have a shared genetic basis between the sexes. However, the underlying causes of sexual conflict, and the mechanisms by which it can be resolved, remain hotly debated. We investigated the manifestation and resolution of sexual conflict using genome and transcriptome data from the guppy. We first tested the dominant model of sex chromosome evolution, which posits that recombination is suppressed between emerging X and Y chromosomes in order to resolve sexual conflict. Using replicate wild populations with differing levels of sexual conflict over colour, we provide support for the role of sex-linkage in the resolution of sexual antagonism. Next we combined several powerful population genomic approaches to differentiate the selective forces generating sexual conflict and tested the potential for regulatory evolution to resolve conflict between the sexes across the entire genome. Together, our findings suggest that sexual conflict is a pervasive force in genome evolution, shaping broad patterns of genome diversity.