Effects of different mating scenarios on embryo viability in brown trout.

Détails

ID Serval
serval:BIB_0D2A774FA853
Type
Article: article d'un périodique ou d'un magazine.
Collection
Publications
Titre
Effects of different mating scenarios on embryo viability in brown trout.
Périodique
Molecular Ecology
Auteur(s)
Jacob A., Evanno G., Von Siebenthal B.A., Grossen C., Wedekind C.
ISSN
1365-294X[electronic], 0962-1083[linking]
Statut éditorial
Publié
Date de publication
2010
Peer-reviewed
Oui
Volume
19
Numéro
23
Pages
5296-5307
Langue
anglais
Résumé
Mating with attractive or dominant males is often predicted to offer indirect genetic benefits to females, but it is still largely unclear how important such non-random mating can be with regard to embryo viability. We sampled a natural population of adult migratory brown trout (Salmo trutta), bred them in vitro in a half-sib breeding design to separate genetic from maternal environmental effects, raised 2098 embryos singly until hatching, and exposed them experimentally to different levels of pathogen stress at a late embryonic stage. We found that the embryos' tolerance to the induced pathogen stress was linked to the major histocompatibility complex (MHC) of their parents, i.e. certain MHC genotypes appeared to provide better protection against infection than others. We also found significant additive genetic variance for stress tolerance. Melanin-based dark skin patterns revealed males with 'good genes', i.e. embryos fathered by dark coloured males had a high tolerance to infection. Mating with large and dominant males would, however, not improve embryo viability when compared to random mating. We used simulations to provide estimates of how mate choice based on MHC or melanin-based skin patterns would influence embryos' tolerance to the experimentally induced pathogen stress.
Mots-clé
compatible genes, good genes, melanin-based colours, major histocompatibility complex, pathogen resistance, Salmonid
Pubmed
Web of science
Création de la notice
08/09/2010 8:14
Dernière modification de la notice
03/03/2018 13:39
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