Growth Performance of Complete Diallel Crosses Among New Varieties of Chinese Pearl Oyster Pinctada martensii  

作　　者：FAN Chao ZHANG Xuekai ZHANG Xingzhi YUE Shaobo LI Yangchun TANG Liming LI Qiongzhen WANG Zhaoping 

机构地区：[1]The Key Laboratory of Mariculture of Ministry of Education,Ocean University of China,Qingdao 266003,China [2]Guangxi Key Laboratory of Aquatic Genetic Breeding and Healthy Aquaculture,Guangxi Academy of Fisheries Sciences,Nanning 530021,China

出　　处：《Journal of Ocean University of China》2023年第1期189-197,共9页中国海洋大学学报（英文版）

基　　金：funded by the National Natural Science Foundation of China(No.911221680).

摘　　要：Pinctada martensii is an important shellfish for the production of sea pearls in China.To improve the growth performance of P.martensii,we successfully established three complete diallel crosses using three new varieties of P.martensii,which were named Haiyou No.1,Haixuan No.1,and Nanke No.1,to investigate the growth performance of each self-cross line and hybrid line in Beihai,Guangxi Zhuang Autonomous Region,China.Generally,high fertilization and hatching rates were observed in the experiment,suggesting that there was no sperm-egg recognition barrier among these three P.martensii varieties.The survival rate of the self-cross lines was relatively higher than that of hybrid lines,and♀‘Haixuan No.1’×♂‘Haiyou No.1’maintained a high survival rate during the grow-out stage.The shell length and width were affected by the genotypes as well as the interaction between the genotypes and environmental factors on day 400.The variances of the general combining abilities(GCA)and specific combining abilities(SCA)for shell length and width were the result of both additive genetic variance and nonadditive genetic variance.When Haixuan No.1 was the female parent and Nanke No.1 was the male parent,the GCA for shell length and width were both positive on day 400.The heterosis of Haixuan No.1 and Nanke No.1 in terms of shell length and width was positive.From the resulting combining ability and heterosis,♀‘Haixuan No.1’×♂‘Nanke No.1’was considered an ideal hatchery method to improve the growth performance of P.martensii.Our results therefore demonstrated that crossbreeding among these three new varieties can further improve the growth performance of P.martensii.

关 键 词：Pinctada martensii CROSSBREEDING growth performance combining ability HETEROSIS 

分 类 号：S917.4[农业科学—水产科学]