Data/hora: 10/06/2024 09:13:13

Provedor de dados: 	5	
País: 	France	
Título: 	Fitness landscapes support the dominance theory of post-zygotic isolation in the mussels Mytilus edulis and M. galloprovincialis	
Autores: 	Bierne, Nicolas; Bonhomme, Francois; Boudry, Pierre; Szulkin, M; David, Pierre.	
Data: 	2006-05	
Ano: 	2006	
Palavras-chave: 	Mytilus; Dobzhansky Muller incopatibilities; Post zygotic isolation; Negative epistasis; Hybrid breakdown; Hybrid zone.	
Resumo: 	We studied the genetic basis of post-zygotic isolation in the marine mussels Mytilus edulis and Mytilus galloprovincialis. Evidence was obtained for a high number of recessive Dobzhansky-Muller substitutions in the genome of these two mussel taxa. We analysed the segregation of unlinked diagnostic markers in the progeny of two backcrosses and an F-2 cross, 36 h and 200 days after fertilization. Directional selection favouring M. galloprovincialis genotypes was observed in both kinds of cross. In the F-2, epistatic interactions between each pair of chromosome fragments mapped by the markers were identified in addition. Our results imply that homozygous-homozygous interactions are required for breakdown of coadaptation, in accordance with the dominance theory of post-zygotic isolation. Endogenous post-zygotic selection distributed over many loci throughout the genome provides the missing factor explaining the astonishing persistence and strength of barriers to neutral introgression in such a dispersive taxon as Mytilus.	
Tipo: 	Text	
Idioma: 	Inglês	
Identificador: 	http://archimer.ifremer.fr/doc/2006/publication-1350.pdf

DOI:10.1098/rspb.2005.3440	
Editor: 	Royal Society of London	
Relação: 	http://archimer.ifremer.fr/doc/00000/1350/	
Formato: 	application/pdf	
Fonte: 	Proceedings of the Royal society of London (B) (Biological sciences) (0962-8452) (Royal Society of London), 2006-05 , Vol. 273 , N. 1591 , P. 1253-1260	
Fonte: 	2006 The Royal Society