Chromosomal rearrangements and gene flow over time in an inter-specific hybrid zone of the Sorex araneus group.

Détails

ID Serval
serval:BIB_41662EC6C44B
Type
Article: article d'un périodique ou d'un magazine.
Collection
Publications
Titre
Chromosomal rearrangements and gene flow over time in an inter-specific hybrid zone of the Sorex araneus group.
Périodique
Heredity
Auteur(s)
Yannic G., Basset P., Hausser J.
ISSN
1365-2540 (Electronic)
ISSN-L
0018-067X
Statut éditorial
Publié
Date de publication
2009
Peer-reviewed
Oui
Volume
102
Numéro
6
Pages
616-625
Langue
anglais
Résumé
Most hybrid zones have existed for hundreds or thousands of years but have generally been observed for only a short time period. Studies extending over periods long enough to track evolutionary changes in the zones or assess the ultimate outcome of hybridization are scarce. Here, we describe the evolution over time of the level of genetic isolation between two karyotypically different species of shrews (Sorex araneus and Sorex antinorii) at a hybrid zone located in the Swiss Alps. We first evaluated hybrid zone movement by contrasting patterns of gene flow and changes in cline parameters (centre and width) using 24 microsatellite loci, between two periods separated by 10 years apart. Additionally, we tested the role of chromosomal rearrangements on gene flow by analysing microsatellite loci located on both rearranged and common chromosomes to both species. We did not detect any movement of the hybrid zone during the period analysed, suggesting that the zone is a typical tension zone. However, the gene flow was significantly lower among the rearranged than the common chromosomes for the second period, whereas the difference was only marginally significant for the first period. This further supports the role of chromosomal rearrangements on gene flow between these taxa.
Mots-clé
Animals, Chromosome Aberrations, Chromosomes, Mammalian/genetics, Gene Flow, Microsatellite Repeats, Shrews/genetics, Species Specificity, Time Factors
Pubmed
Web of science
Open Access
Oui
Création de la notice
02/04/2009 16:33
Dernière modification de la notice
08/05/2019 17:40
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