Effects of partial selfing on the equilibrium genetic variance, mutation load, and inbreeding depression under stabilizing selection
2018
Abu Awad, Diala | Roze, Denis | Amélioration génétique et adaptation des plantes méditerranéennes et tropicales (UMR AGAP) ; Centre de Coopération Internationale en Recherche Agronomique pour le Développement (Cirad)-Institut National de la Recherche Agronomique (INRA)-Centre international d'études supérieures en sciences agronomiques (Montpellier SupAgro)-Institut national d’études supérieures agronomiques de Montpellier (Montpellier SupAgro) | Biologie évolutive et écologie des algues = Evolutionary Biology and Ecology of Algae (EBEA) ; Pontificia Universidad Católica de Chile (UC)-Sorbonne Université (SU)-Universidad Austral de Chile-Centre National de la Recherche Scientifique (CNRS)-Station biologique de Roscoff = Roscoff Marine Station (SBR) ; Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS) | French Agence Nationale de la Recherche : ANR-13-ADAP-0011, ANR-14-CE02-0001 | ANR-13-ADAP-0011,SEAD,Comment l'autofécondation affecte-t-elle l'adaptation : Conséquences génétiques et démographiques(2013) | ANR-14-CE02-0001,SexChange,L'évolution du sexe dans des environnements changeant dans le temps et dans l'espace(2014)
International audience
Afficher plus [+] Moins [-]anglais. The mating system of a species is expected to have important effects on its genetic diversity. In this article, we explore the effects of partial selfing on the equilibrium genetic variance V-g, mutation load L, and inbreeding depression under stabilizing selection acting on a arbitrary number n of quantitative traits coded by biallelic loci with additive effects. When the U/n ratio is low (where U is the total haploid mutation rate on selected traits) and effective recombination rates are sufficiently high, genetic associations between loci are negligible and the genetic variance, mutation load, and inbreeding depression are well predicted by approximations based on single-locus models. For higher values of U/n and/or lower effective recombination, moderate genetic associations generated by epistasis tend to increase V-g, L, and , this regime being well predicted by approximations including the effects of pairwise associations between loci. For yet higher values of U/n and/or lower effective recombination, a different regime is reached under which the maintenance of coadapted gene complexes reduces V-g, L, and . Simulations indicate that the values of V-g, L, and are little affected by assumptions regarding the number of possible alleles per locus.
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