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Selection of a new scallop strain, QN‐2, from the backcross of Peruvian scallop × bay scallop F 1 hybrids with bay scallops
Author(s) -
Xu Dongxue,
Wang Chunde,
Liu Bo,
Chen Min,
Ke Ke,
Zhao Yuming,
Ma Bin,
Liu Guilong,
Zhao Xia,
Zhang Jinsheng
Publication year - 2019
Publication title -
aquaculture research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.646
H-Index - 89
eISSN - 1365-2109
pISSN - 1355-557X
DOI - 10.1111/are.14329
Subject(s) - scallop , bay , biology , argopecten irradians , hybrid , backcrossing , heterosis , fishery , patinopecten yessoensis , selective breeding , aquaculture , botany , ecology , fish <actinopterygii> , oceanography , genetics , gene , geology
Cross‐breeding has been successfully applied in agriculture and aquaculture industries to improve important production traits. In our previous studies, we produced the F 1 hybrids with high heterosis in growth by crossing the bay scallops with the Peruvian scallops and selected a new strain, Bohai Red, from the F 1 hybrids. In this study, we selected another new strain from the backcross (BC 1 ) of the F 1 hybrids with bay scallops. The base cohort (G 0 ) was size‐selected from the BC 1 , and the G 1 , G 2 , G 3 and G 4 cohorts were produced with size‐selected brood stocks from the G 0 , G 1 , G 2 and G 3 cohorts respectively. Our results showed that average shell height, shell length, shell width and whole body weight of the G 4 cohort were increased by 16.8%, 16.8%, 11.5% and 43.6%, respectively, compared with the unselected control group of bay scallop. This new strain has now become one of the major cultured Argopecten scallops in northern China waters and was later named QN‐2.