Using a Bayesian method to assign individuals to karyotypic taxa in shrew hybrid zones.

Détails

ID Serval
serval:BIB_593232846D3D
Type
Article: article d'un périodique ou d'un magazine.
Collection
Publications
Titre
Using a Bayesian method to assign individuals to karyotypic taxa in shrew hybrid zones.
Périodique
Cytogenetic and Genome Research
Auteur(s)
Basset P., Yannic G., Brunner H., Hausser J.
ISSN
1424-859X (Electronic)
ISSN-L
1424-8581
Statut éditorial
Publié
Date de publication
2007
Volume
116
Numéro
4
Pages
282-288
Langue
anglais
Résumé
Individuals sampled in hybrid zones are usually analysed according to their sampling locality, morphology, behaviour or karyotype. But the increasing availability of genetic information more and more favours its use for individual sorting purposes and numerous assignment methods based on the genetic composition of individuals have been developed. The shrews of the Sorex araneus group offer good opportunities to test the genetic assignment on individuals identified by their karyotype. Here we explored the potential and efficiency of a Bayesian assignment method combined or not with a reference dataset to study admixture and individual assignment in the difficult context of two hybrid zones between karyotypic species of the Sorex araneus group. As a whole, we assigned more than 80% of the individuals to their respective karyotypic categories (i.e. 'pure' species or hybrids). This assignment level is comparable to what was obtained for the same species away from hybrid zones. Additionally, we showed that the assignment result for several individuals was strongly affected by the inclusion or not of a reference dataset. This highlights the importance of such comparisons when analysing hybrid zones. Finally, differences between the admixture levels detected in both hybrid zones support the hypothesis of an impact of chromosomal rearrangements on gene flow.
Mots-clé
Animals, Bayes Theorem, Cluster Analysis, Geography, Hybridization, Genetic, Karyotyping, Shrews/classification, Shrews/genetics
Pubmed
Web of science
Création de la notice
24/01/2008 20:02
Dernière modification de la notice
20/08/2019 15:12
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