Searching for intra-locus sexual conflicts in the three-spined stickleback (Gasterosteus aculeatus) genome - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Evolution - International Journal of Organic Evolution Année : 2023

Searching for intra-locus sexual conflicts in the three-spined stickleback (Gasterosteus aculeatus) genome

Eric Normandeau
Louis Bernatchez
  • Fonction : Auteur
  • PersonId : 1076000

Résumé

Differences between sexes in trait fitness optima can generate intra-locus sexual conflicts that have the potential to maintain genetic diversity through balancing selection. However, these differences are unlikely to be associated with strong selective coefficients and are challenging to detect. Additionally, recent studies have highlighted that duplications on sexual chromosomes can create artefactual signals of intra-locus sexual conflicts. Thus, testing the relationship between intra-locus sexual conflicts and balancing selection requires stringent filtering of duplicated regions, and dedicated methods to detect loci with low levels of intersex differentiation. In this study, we investigated intra-locus sexual conflicts in the three-spined stickleback using whole genome sequencing (mean coverage = 12X) of 50 females and 49 males from an anadromous population in the St. Lawrence River, Québec, Canada. After stringent filtering of duplications from the sex chromosomes, we compared three methods to detect intra-locus sexual conflicts. We found only two genomic regions under potential intra-locus sexual conflict that also showed signals of balancing selection. Overall, our results suggest that most intra-locus sexual conflicts do not drive long-term balancing selection and are most likely transient.
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Origine : Publication financée par une institution

Dates et versions

hal-04088578 , version 1 (30-05-2023)

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Paternité - Pas d'utilisation commerciale

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Florent Sylvestre, Claire Mérot, Eric Normandeau, Louis Bernatchez. Searching for intra-locus sexual conflicts in the three-spined stickleback (Gasterosteus aculeatus) genome. Evolution - International Journal of Organic Evolution, 2023, ⟨10.1093/evolut/qpad075⟩. ⟨hal-04088578⟩
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