Production traits and fertility of reciprocal hybrids between Argopecten irradians irradians and A.i.concentricus  

作　　者：Jinjing WANG Junhao NING Xia LU Min CHEN Guilong LIU Xin XU Quanchao WANG He XU Chunde WANG 

机构地区：[1]Research and Development Center for Efficient Utilization of Coastal Bioresources,Yantai Institute of Coastal Zone Research,Chinese Academy of Sciences,Yantai 264003,China [2]College of Marine Science and Engineering,Qingdao Agricultural University,Qingdao 266109,China [3]University of Chinese Academy of Sciences,Beijing 100049,China [4]Yantai Spring-Sea AquaSeed Co.,Ltd.,Yantai 264006,China [5]Jiangsu Baoyuan Biotechnology Co.,Ltd.,Lianyungang 222144,China [6]Jiangsu Haitai MariTech Co.,Ltd.,Lianyungang 222144,China

出　　处：《Journal of Oceanology and Limnology》2024年第1期304-315,共12页海洋湖沼学报（英文）

基　　金：the National Natural Science Foundation of China(No.31972791);the Earmarked Fund for Agriculture Seed Improvement Project of Shandong Province(No.2020LZGC016);the Scientific and Technological Project of Yantai,Shandong Province(No.2022XCZX083);the Earmarked Fund for Shandong Modern Agro-Industry Technology Research System(No.SDAIT-14)。

摘　　要：The two bay scallop subspecies,Argopecten irradians irradians(NN)and A.i.concentricus(SS),are fast growing and major cultured bivalves in China.However,their relatively small sizes and decreasing production traits caused by long-term inbreeding have been major concerns to the industry in the last two decades.Hybridization between the two bay scallop subspecies may provide a new approach to breed a new variety with superior production traits for the industry.For this end,in this study,we hybridized the two bay scallop subspecies in order to obtain a new strain that incorporates the genes of both subspecies.No significant difference was found in fertilization rate,hatching rate and metamorphosis rate between the purebred and crossbred cohorts(NN♀×SS♂,denoted as NS;SS♀×NN♂,denoted as SN).Both mating strategy(intra-vs.inter-population crosses)and egg origin had significant effects on growth and survival at the larval stage.Heterosis was observed in the crossbred and was more pronounced in older stages.Genetic diversity of the reciprocal hybrids,especially that of SN,was increased compared with the purebred cohorts.Almost all hybrids were completely fertile and able to reproduce by selffertilization or by backcrossing with either parent.Apparently,male sterile individuals whose gonads were fully occupied by the ovary part at mature stage were found in the hybrids for the first time.The hybrids,especially SN,may provide precious germplasm resources for the production of ternary hybrids with the Peruvian scallop,A.purpuratus.

关 键 词：bay scallop HYBRIDIZATION growth survival HETEROSIS FERTILITY ternary hybrids 

分 类 号：Q958[生物学—动物学]