TY - JOUR T1 - An amylase gene polymorphism is associated with growth differences in the Pacific cupped oyster Crassostrea gigas A1 - Prudence,Marie A1 - Moal,Jeanne A1 - Boudry,Pierre A1 - Daniel,Jean-Yves A1 - Quere,Claudie A1 - Jeffroy,Fanny A1 - Mingant,Christian A1 - Ropert,Michel A1 - Bedier,Edouard A1 - Van Wormhoudt,A A1 - Samain,Jean-Francois A1 - Huvet,Arnaud AD - IFREMER, Ctr Brest, UMR100, F-29280 Plouzane, France. AD - IFREMER, LGP, F-17390 La Tremblade, France. AD - IFREMER, LERN, F-14520 Port En Bessin, France. AD - IFREMER, LERMPL, F-56470 La Trinite, France. AD - MNHN, UMR5178, F-29900 Concarneau, France. UR - https://archimer.ifremer.fr/doc/00000/1691/ DO - 10.1111/j.1365-2052.2006.01481.x KW - Growth KW - Genotype KW - Digestive enzyme KW - Bivalve KW - Alpha amylase N2 - This study investigated the non-neutrality of genetic polymorphism in two alpha-amylase genes (AMYA and AMYB) in the oyster Crassostrea gigas. Bi-parental oyster families, bred to be polymorphic for markers in these genes, were monitored for growth and survival for 1 year under standard culture conditions in two French production sites. Within-family genotype frequencies indicated that the two amylase genes were closely linked (c. 1.7 cM). Within two of three families, significant differences in growth were observed between genotypes at one of the two production sites, suggesting that this polymorphism is not neutral and might be under selection because of its role in digestive function. Estimated daily yields were different between amylase genotypes, indicating the potential value of amylase markers in selective breeding programmes to improve oyster growth. Y1 - 2006/08 PB - Blackwell science JF - Animal Genetics SN - 0268-9146 VL - 37 IS - 4 SP - 348 EP - 351 ID - 1691 ER -