Genetic basis of summer mortality in juvenile cupped oysters

Type Slideshow
Date 2003-04-13
Language English
Author(s) Degremont LionelORCID, Boudry PierreORCID, Bedier Edouard, Ropert MichelORCID, Soletchnik Patrick, Huvet ArnaudORCID, Moal Jeanne, Samain Jean-Francois
Meeting 95. Annual Meeting of the National Shellfisheries Association, New Orleans, LA (USA), 13-17 Apr 2003
Keyword(s) Summer, Oyster culture, Juveniles mortality, Genetics, Commercial species, Breeding
Abstract The French project "Morest", coordinated by IFREMER, aims to understand the causes of the summer mortalities in Crassostrea gigas. In 2001, three sets of families were bred following a nested half-sib mating design. 17 half-sib families (HSF) were obtained in this first generation (G1) and reared in 3 sites. Significant differences in survival were observed among HSF, and some HSF showed high levels of mortality in all sites, clearly indicating a genetic basis for survival. In 2002, a second generation (G2), including divergent selection and inbred lines, was constituted. Monitoring of survival and growth of G2s were the same as in 2001. Significant differences in survival were found between the offspring of the "high" and "low" selected groups and between inbred lines. The high realized heritability for survival indicates that selective breeding programs could efficiently improve survival of juvenile oysters.
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Degremont Lionel, Boudry Pierre, Bedier Edouard, Ropert Michel, Soletchnik Patrick, Huvet Arnaud, Moal Jeanne, Samain Jean-Francois (2003). Genetic basis of summer mortality in juvenile cupped oysters. 95. Annual Meeting of the National Shellfisheries Association, New Orleans, LA (USA), 13-17 Apr 2003. https://archimer.ifremer.fr/doc/00000/3346/