水产学报2012，Vol.36Issue(2)：210-215,6.DOI:10.3724/SP.J.1231.2012.27712
太平洋牡蛎与葡萄牙牡蛎两近缘种间杂交及其早期阶段生长与存活的杂种优势
Hybridization between the two close related species Crassostrea gigas and C.angulata and heterosis for growth and survival at early stage of life history
摘要
Abstract
The Pacific oyster Crossostrea gigas and the Portuguese oyster C. angulata are two close related species and are also two most important cultured oysters in China, which have been separately cultured in North and South China. In order to improve production by exploring heterosis, two hybrid groups of NS (N♂ xS♀)andSN(S♂ xN♀ )and two purebred groups of NN(N ♂ ×N ♀ )and SS(S ♂ ×S♀)were established using a diallel cross design with the parents of the Pacific oyster from Qingdao of Shandong(N) and the Portuguese oyster from Shantou of Guangdong (S). The present results showed that hybridization between the two close related species was successful. Two production traits of growth rate and survival rate for hybrids were both improved, and significant heterosis for them was obtained. The hybrids grew faster than the purebreds, and heterosis for growth rate is 37. 44% at larvae stage and 42. 47% at spat stage, respectively. The hybrids also survived more than the purebreds, and heterosis for survival rate is 76. 80% and 107.70% for larvae on day 8 and 14,and 17.30% ,15.62% and 9.08% ,for juveniles on day 60,90, and 105,respectively. Our study showed that some problems influencing oyster production such as difficult breeding seeds, lower survival rate, slower growth, and smaller size could be solved by cross breeding between the close related species.关键词
太平洋牡蛎/葡萄牙牡蛎/近缘种/杂交/杂种优势Key words
Crossostrea gigas/ C. angulata/ close related species/ cross breeding/heterosis分类
生物科学引用本文复制引用
郑怀平,王迪文,林清,孙泽伟,张涛,陈兴强..太平洋牡蛎与葡萄牙牡蛎两近缘种间杂交及其早期阶段生长与存活的杂种优势[J].水产学报,2012,36(2):210-215,6.基金项目
广东省教育部产学研结合项目(2009B090300344) （2009B090300344）
广东省普通高校工程技术研究中心建设项目(GCZX-0908) （GCZX-0908）
国家现代农业技术体系-贝类(CARS-48) （CARS-48）
广东省科技计划项目(2010B020201014,2011B020307006) （2010B020201014,2011B020307006）
