Evolutionary aspects of population structure for molecular and quantitative traits in the freshwater snail Radix balthica.

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Etat: Serval
Version: de l'auteur
ID Serval
serval:BIB_F9701EAA205A
Type
Article: article d'un périodique ou d'un magazine.
Collection
Publications
Titre
Evolutionary aspects of population structure for molecular and quantitative traits in the freshwater snail Radix balthica.
Périodique
Journal of Evolutionary Biology
Auteur(s)
Evanno G., Castella E., Goudet J.
ISSN
1010-061X[print], 1010-061X[linking]
Statut éditorial
Publié
Date de publication
2006
Volume
19
Numéro
4
Pages
1071-1082
Langue
anglais
Résumé
Detecting the action of selection in natural populations can be achieved using the QST-FST comparison that relies on the estimation of FST with neutral markers, and QST using quantitative traits potentially under selection. QST higher than FST suggests the action of directional selection and thus potential local adaptation. In this article, we apply the QST-FST comparison to four populations of the hermaphroditic freshwater snail Radix balthica located in a floodplain habitat. In contrast to most studies published so far, we did not detect evidence of directional selection for local optima for any of the traits we measured: QST calculated using three different methods was never higher than FST. A strong inbreeding depression was also detected, indicating that outcrossing is probably predominant over selfing in the studied populations. Our results suggest that in this floodplain habitat, local adaptation of R. balthica populations may be hindered by genetic drift, and possibly altered by uneven gene flow linked to flood frequency.
Mots-clé
Animals, Evolution, Fresh Water, Inbreeding, Quantitative Trait Loci, Snails/genetics
Pubmed
Web of science
Open Access
Oui
Création de la notice
24/01/2008 18:10
Dernière modification de la notice
09/05/2019 3:44
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