Data/hora: 03/06/2024 17:11:28

Provedor de dados: 	5	
País: 	France	
Título: 	Maintenance of genetic differentiation across a transition zone in the sea: discordance between nuclear and cytoplasmic markers	
Autores: 	Lemaire, Christophe; Versini, J; Bonhomme, Francois.	
Data: 	2005	
Ano: 	2005	
Palavras-chave: 	Reproductive isolation; Phylogeography; MtDNA; Microsatellites; Genetic transitions.	
Resumo: 	To investigate the origin and maintenance of the genetic discontinuity between Atlantic and Mediterranean populations of the common sea bass (Dicentrarchus labrax) we analysed the genetic variation at a fragment of mitochondrial cytochrome b sequence for 18 population samples. The result were also compared with new or previously published microsatellite data. Seven mitochondrial haplotypes and an average nucleotidic divergence of 0.02 between Atlantic and Mediterranean populations that matches a Pleistocene allopatric isolation were found. The frequency variation at the cytochrome b locus was many times greater between Atlantic and Mediterranean populations ((&amp;#952;) over cap (C) = 0.67) than at microsatellite loci ((&amp;#952;) over cap (N) = 0.02). The examination of the different evolutionary forces at play suggests that a sex-biased hybrid breakdown is a likely explanation for part of the observed discrepancy between mitochondrial and nuclear loci. In addition, an analysis is made of the correlation between microsatellite loci points towards the possible existence of a hybrid zone in samples from the Alboran Sea.	
Tipo: 	Text	
Idioma: 	Inglês	
Identificador: 	http://archimer.ifremer.fr/doc/2005/publication-776.pdf

DOI:10.1111/j.1420-9101.2004.00828.x	
Editor: 	Blackwell science	
Relação: 	http://archimer.ifremer.fr/doc/00000/776/	
Formato: 	application/pdf	
Fonte: 	Journal of Evolutionary Biology (1010-061X) (Blackwell science), 2005 , Vol. 18 , N. 1 , P. 70-80	
Fonte: 	2005 Blackwell Publishing, Inc.