Diversifying selection and color-biased dispersal in the asp viper.

Détails

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Etat: Serval
Version: Final published version
ID Serval
serval:BIB_76EE5A4E5624
Type
Article: article d'un périodique ou d'un magazine.
Collection
Publications
Titre
Diversifying selection and color-biased dispersal in the asp viper.
Périodique
BMC Evolutionary Biology
Auteur(s)
Dubey S., Zwahlen V., Mebert K., Monney J.C., Golay P., Ott T., Durand T., Thiery G., Kaiser L., Geser S.N., Ursenbacher S.
ISSN
1471-2148 (Electronic)
ISSN-L
1471-2148
Statut éditorial
Publié
Date de publication
2015
Volume
15
Pages
99
Langue
anglais
Résumé
BACKGROUND: The presence of intraspecific color polymorphism can have multiple impacts on the ecology of a species; as a consequence, particular color morphs may be strongly selected for in a given habitat type. For example, the asp viper (Vipera aspis) shows a high level of color polymorphism. A blotched morph (cryptic) is common throughout its range (central and western Europe), while a melanistic morph is frequently found in montane populations, presumably for thermoregulatory reasons. Besides, rare atypical uniformly colored individuals are known here and there. Nevertheless, we found in a restricted treeless area of the French Alps, a population containing a high proportion (>50%) of such specimens. The aim of the study is to bring insight into the presence and function of this color morph by (i) studying the genetic structure of these populations using nine microsatellite markers, and testing for (ii) a potential local diversifying selection and (iii) differences in dispersal capacity between blotched and non-blotched vipers.
RESULTS: Our genetic analyses support the occurrence of local diversifying selection for the non-blotched phenotype. In addition, we found significant color-biased dispersal, blotched individuals dispersing more than atypical individuals.
CONCLUSION: We hypothesize that, in this population, the non-blotched phenotype possess an advantage over the typical one, a phenomenon possibly due to a better background matching ability in a more open habitat. In addition, color-biased dispersal might be partly associated with the observed local diversifying selection, as it can affect the genetic structure of populations, and hence the distribution of color morphs.
Mots-clé
Diversifying selection, Dispersal, Coloration, Reptile, Asp viper
Pubmed
Web of science
Open Access
Oui
Création de la notice
29/06/2015 15:25
Dernière modification de la notice
08/05/2019 20:35
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