Genetic differentiation of common shrew Sorex araneus populations among different alpine valleys revealed by microsatellites

Détails

ID Serval
serval:BIB_CB89769CE7EB
Type
Article: article d'un périodique ou d'un magazine.
Collection
Publications
Institution
Titre
Genetic differentiation of common shrew Sorex araneus populations among different alpine valleys revealed by microsatellites
Périodique
Acta Theriologica
Auteur(s)
Lugon-Moulin N., Balloux F., Hausser J.
ISSN
0001-7051
Statut éditorial
Publié
Date de publication
2000
Peer-reviewed
Oui
Volume
45
Numéro
Suppl 1
Pages
103-117
Langue
anglais
Résumé
Geographical barriers may affect the genetic structure of populations by reducing gene exchanges among them. In Switzerland, the common shrew Sorer araneus Linnaeus, 1758 is mostly confined to mountainous areas because of a competing sister species, Millet's shrew S. coronatus Millet, 1828, which occupies most of the Swiss lowlands. The structure of common shrew populations found in different alpine valleys may therefore be affected by the topography. Using microsatellites, genetic structuring of seven shrew populations is investigated among four different valleys of, the Swiss Alps. Using the exact G-test, significant genetic structuring is detected between several valleys. Isolation by distance does not fully explain our results. It appears that high mountain ridges (> 2400 m) can significantly reduce gene flow. F- and R-statistics are estimated and compared to the exact G-tests results. Mantel tests show that F-ST, unlike R-ST, is significantly correlated with differentiation. F-ST remains however low even at high differentiation levels, while R-ST has a high variance. We discuss how these results may have wider implications with regards the interpretation of microsatellite data. Finally, a new microsatellite locus, L99, appears to discriminate S. araneus of the Vaud and Cordon races from both S. araneus Valais and S. coronatus.
Mots-clé
Sorex araneus, microsatellites, exact G-tests, F-statistics, R-statistics, genetic differentiation
Web of science
Création de la notice
24/01/2008 19:02
Dernière modification de la notice
20/08/2019 15:46
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