Data/hora: 06/06/2024 12:19:05

Provedor de dados: | 5
País: | France
Título: | Diversité et différentiation génétique chez l'huître plate européenne : de la population à l'individu (Actes)
Autores: | Boudry, Pierre; Launey, Sophie; Diaz-almela, A.; Naciri-graven, Yamama; Ledu, Christophe; Mira, S.; Taris, Nicolas; Bonhomme, Francois; Lapegue, Sylvie.
Data: | 2003-06-24
Ano: | 2003
Palavras-chave: | Recruitment; Diversity; Molecular markers; Population genetics; Ostrea edulis; Flat oyster; Dynamique de recrutement; Diversité génétique; Microsatellites; Marqueurs moléculaires; Génétique des populations; Ostrea edulis; Huître plate.
Resumo: | PCR-based DNA markers enable the study of diversity and differentiation of marine organisms at different stages of their life cycle. Our study of European fiat oyster (Ostrea edulis) populations aimed to describe their spatial and temporal dynamics. First, we analyzed adults sampled over the natural range of the species. An Atlantic/Mediterranean differentiation pattern was observed. Similar patterns of variation were found using allozymes, microsatellites and mitochondrial DNA, aIl which support an isolation by distance model. High variability was observed in the range of diversity between populations using a mitochondrial marker, a reflection of small effective population sizes in sorne locations. A 10fold quantitative difference was observed in Fst, between the genomes, which may be due to an unbalanced sex ratio and/or differential reproductive success. Secondly, we initiated the study of reproductive dynamics at a finer scale. Several experiments were performed to document: 1- the variance inallele frequencies during a natural settlement period, 2- the paternal contribution to fertilization by analyzing larvae sampled at the brooding stage within individual females,  3- the individual reproductive success within an experimental population. Our results are relevant in terms of management of the genetic diversity and the potential impact of hatchery propagation.
Tipo: | Text
Idioma: | Francês
Identificador: | http://archimer.ifremer.fr/doc/2003/acte-2851.pdf
Editor: | III Congrès International des Sociétés Européennes de Malacologie, La Rochelle, 24-27 huin 2003, 101-102 (Richard G. ed.)
Relação: | http://archimer.ifremer.fr/doc/00000/2851/
Formato: | application/pdf