Please use this identifier to cite or link to this item:
Título : Marked genetic structuring and extreme dispersal limitation in the Pyrenean brook newt Calotriton asper (Amphibia: Salamandridae) revealed by genome-wide AFLP but not mtDNA
Autor : Milá, Borja, Carranza, Salvador, Guillaume, Olivier, Clobert, Jean
Palabras clave : AFLP
Genetic structure
Genome scan
Fecha de publicación : Jan-2010
Editor: Blackwell Publishing
Resumen: Direct estimation of dispersal rates at large geographic scales can be technically and logistically challenging, especially in small animals of low vagility like amphibians. The use of molecular markers to reveal patterns of genetic structure provides an indirect way to infer dispersal rates and patterns of recent and historical gene flow among populations. Here, we use mitochondrial DNA (mtDNA) sequence data and genome-wide amplified fragment length polymorphism markers to examine population structure in the Pyrenean brook newt (Calotriton asper) across four main drainages in the French Pyrenees. mtDNA sequence data (2040 bp) revealed three phylogroups shallowly differentiated and with low genetic diversity. In sharp contrast, variation in 382 amplified fragment length polymorphism loci was high and revealed a clear pattern of isolation by distance consistent with long-term restriction of gene flow at three spatial scales: (i) among all four main drainages, (ii) between sites within drainages, and (iii) even between adjacent populations separated by less than 4 km. The high pairwise FST values between localities across numerous loci, together with the high frequency of fixed alleles in several populations, suggests a combination of marked geographic isolation, small population sizes and very limited dispersal in C. asper. The contrasting lack of variation detected in mtDNA sequence data is intriguing and underscores the importance of multilocus approaches to detect true patterns of gene flow in natural populations of amphibians.
Descripción : 13 páginas, 5 figuras, 6 tablas.
Versión del editor:
ISSN: 0962-1083
DOI: 10.1111/j.1365-294X.2009.04441.x
Citación : Molecular Ecology 19(1): 108-120 (2010)
Appears in Collections:(MNCN) Artículos
(IBE) Artículos

Files in This Item:
There are no files associated with this item.
Show full item record

Items in Digital.CSIC are protected by copyright, with all rights reserved, unless otherwise indicated.