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Conséquences génétiques de la production de larves d'huîtres en écloserie : étude des processus de dérive et de sélection ArchiMer
Taris, Nicolas; Sauvage, Christopher; Batista, Frederico; Baron, Sophie; Ernande, Bruno; Haffray, Pierrick; Boudry, Pierre.
Previous studies have shown heritable variation in larval developmental traits in the Pacific oyster Crassostrea gigas. In order to study the genetic consequences of production of oyster larvae in hatcheries, two factors, specific to hatcheries, were examined: the effect of discarding the smallest larvae (i.e. culling) and the effect of temperature (20°C versus 26°C). A mixed-family approach was used in order to infer the genetic composition of larval populations and family assignment, limiting possible environmental bias and allowing the study of a relatively large number of families using a limited number of larval tanks. Our results show that three multiplexed highly polymorphic microsatellite markers are a powerful tool for family assignment and,...
Tipo: Text Palavras-chave: Hatchery; Genetic diversity; Selection domestication; Larvae; Crassostrea gigas; Ecloserie; Diversité génétique; Sélection domestication; Larve; Crassostrea gigas.
Ano: 2006 URL: http://archimer.ifremer.fr/doc/2006/acte-1505.pdf
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Conséquences génétiques de la production intensive de larves d'huîtres en écloserie : étude des processus de dérive et de sélection liés aux pratiques d'élevage. ArchiMer
Taris, Nicolas.
In order to study the genetic influence of intensive production of the larval stage in commercial hatcheries, two types of specific selective processes were examined: the effects of discarding the smallest larvae and temperature. A mixed-family approach was used in order to infer the genetic composition of the larvae. The results show that our mixed-family approach, combined with microsatellite-based family assignment, is a powerful tool for the study of bivalve larvae genetics. Selective sieving is an advantageous practice at a phenotypic scale, but also represents a substantial risk for diversity loss. The culled larvae are important for the minimization of the variability in reproductive success and the maximization of broodstock genetic diversity....
Tipo: Text Palavras-chave: Hatchery; Oyster; Genetic diversity; Selection domestication; Larvae; Crassostrea gigas; Ecloserie; Huître; Diversité génétique; Sélection domestication; Larve; Crassostrea gigas.
Ano: 2005 URL: http://archimer.ifremer.fr/doc/2005/these-976.pdf
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Etude des processus de dérive et de sélection liés aux pratiques d'élevage en écloserie d'huître creuse ArchiMer
Boudry, Pierre.
Genetic consequences of production of Pacific oyster larval in hatchery: drift and selective pressures related to rearing practices. In order to study the genetic consequences of production of oyster larvae in hatcheries, two factors were examined: the effects of discarding the smallest larvae (i.e. culling) and temperature effects. A mixed-family approach was used in order to infer the genetic composition of the larval population. The results show that high polymorphic microsatellite-based family assignment is a powerful tool for the study of bivalve larvae genetics. Culling by selective sieving is an advantageous practice at a phenotypic scale, but also represents a substantial risk for diversity loss if parentage assignment is not introduced as a...
Tipo: Text Palavras-chave: Hatchery; Genetic diversity; Selection domestication; Larvae; Crassostrea gigas; Ecloserie; Diversité génétique; Sélection domestication; Larve; Crassostrea gigas.
Ano: 2006 URL: http://archimer.ifremer.fr/doc/2006/rapport-1459.pdf
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