中国水产科学2016，Vol.23Issue(6)：1358-1367,10.DOI:10.3724/SP.J.1118.2016.16012
壳金长牡蛎自交和杂交家系生长与存活比较
Comparison of growth and survival of the hybrid and inbred families in the golden shell color strain of Pacific oyster (Crassostrea gigas)
摘要
Abstract
The Pacific oyster (Crassostrea gigas) is one of the most important cultured bivalve species in the world. Given that oysters with golden shell coloration are rarely seen in the market and are sold at much higher prices than others, developing the golden shell line ofC. gigasto have enhanced growth traits and survival rates is of great consequence. A series of 3´3 diallel crosses of three full-sib inbreeding families in the golden shell color strain ofC. gigas of G2(A) with better growth performance and G19(B) and G28(C) with better growth and sur-vival performance was conducted, including three inbreeding groups (AA, BB, CC) and six hybrid groups (AB, AC, BA, BC, CA, CB). Growth performance, survival rate and heterosis were evaluated and compared at larval and juvenile stages between different groups. The results showed that most of the hybrid groups presented better growth performance and survival rate than their inbreeding groups at different stages. At the larval stage of day 5, the larval shell height and shell length of all the hybrid groups were significantly greater than the inbreeding groups (P<0.05). At days 10, 15 and 20, the shell height and shell length of the CB and BC groups were out-standing: the differences between them and their corresponding inbreeding groups were significant (P<0.05), and the heterosis was obvious. At day 10, the larval survival rate of CB was significantly greater than AA and CA(P<0.05). The heterosis of larval shell height, shell length and survival rate among all hybrid groups were be-tween 1.88% and 14.24%, 0.28% and 14.67% and 10.72% and 23.22%, respectively. At the juvenile stage, each group also showed differences in growth and survival characteristics, and the three growth traits and survival rate of hybrid groups showed different heterosis. At days 85 and 130, the shell height of hybrid group CB was greater than the other experimental groups. The heterosis of the survival rate of AC, CA and CB groups showed a clear trend to increase with age. At day 190, the juvenile survival rate of AC and BC was significantly greater than AA and CC (P<0.05). The heterosis of the juvenile shell height, shell length, total weight and survival rate was be-tween 11.04% and 9.42%, 11.59% and 13.98%, 3.85% and 27.99% and 3.60% and 12.63%, respectively. All re-sults were consistent with those of the larval stage, showing bad constancy and balance. This result provides an important basis for genetic improvement and better utilization of heterosis of the golden shell color strain of C. gigas.关键词
长牡蛎/壳金/生长/存活/杂种优势Key words
Crassostrea gigas/golden shell color/growth trait/survival/heterosis分类
农业科技引用本文复制引用
王雪磊,李琪,孔令锋,于红,于瑞海..壳金长牡蛎自交和杂交家系生长与存活比较[J].中国水产科学,2016,23(6):1358-1367,10.基金项目
泰山学者种业计划专家项目 （）
农业科技成果转化资金项目(2014GB2B020029) （2014GB2B020029）
山东省科技发展计划项目(2014GHY115002) （2014GHY115002）
