Evidence for inbreeding depression and post-pollination selection against inbreeding in the dioecious plant Silene latifolia.

Détails

ID Serval
serval:BIB_1AA407E61C15
Type
Article: article d'un périodique ou d'un magazine.
Collection
Publications
Titre
Evidence for inbreeding depression and post-pollination selection against inbreeding in the dioecious plant Silene latifolia.
Périodique
Heredity
Auteur(s)
Teixeira S., Foerster K., Bernasconi G.
ISSN
1365-2540[electronic]
Statut éditorial
Publié
Date de publication
2009
Volume
102
Numéro
2
Pages
101-112
Langue
anglais
Résumé
In many species, inbred individuals have reduced fitness. In plants with limited pollen and seed dispersal, post-pollination selection may reduce biparental inbreeding, but knowledge on the prevalence and importance of pollen competition or post-pollination selection after non-self pollination is scarce. We tested whether post-pollination selection favours less related pollen donors and reduces inbreeding in the dioecious plant Silene latifolia. We crossed 20 plants with pollen from a sibling and an unrelated male, and with a mix of both. We found significant inbreeding depression on vegetative growth, age at first flowering and total fitness (22% in males and 14% in females). In mixed pollinations, the unrelated male sired on average 57% of the offspring. The greater the paternity share of the unrelated sire, the larger the difference in relatedness of the two males to the female. The effect of genetic similarity on paternity is consistent with predictions for post-pollination selection, although paternity, at least in some crosses, may be affected by additional factors. Our data show that in plant systems with inbreeding depression, such as S. latifolia, pollen or embryo selection after multiple-donor pollination may indeed reduce inbreeding.
Mots-clé
Crosses, Genetic, Inbreeding, Pollen/genetics, Pollen/physiology, Pollination, Selection (Genetics), Silene/genetics, Silene/physiology
Pubmed
Web of science
Open Access
Oui
Création de la notice
18/07/2008 16:19
Dernière modification de la notice
20/08/2019 13:51
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