Early growth and development of hybrid Manila clam Ruditapes philippinarum cultured between Laizhou population in China×Sinǔiju population in north Korea
LI Jinlong1, LIU Yue1, CHE Zonghao1, TIAN Yuan1, LIU Jie1, YAN Xiwu1,2, HUO Zhongming1,2*
1.College of Fisheries and Life Science, Dalian Ocean University, Dalian; 2.Engineering Research Center of Shellfish Culture and Breeding in Liaoning Province, Dalian
Abstract: China Laizhou(C)and north Korea Sinǔiju(K)populations of wild Manila clam Ruditapesphilippinarum as the parents were diallelly crossed to produce 2 self propagating populations of CC(C♀×C♂)and KK(K♀×K♂), and 2 reciprocal cross groups of CK(C♀×K♂)and KC(K♀×C♂)in order to culture fine species of Manila clam with good economic characters and suitable for northern sea environment.The results showed that there was the maximal fertilization rate(96.23±1.67)% in group CC, and the minimal one(88.80±1.84)% in group CK.The maximal hatching rate(86.80±0.78)% was observed in group CC, and the minimal one(72.05±0.82)% in KC group.In the larval stage, the heterosis of growth and survival was observed in the hybrid, the descending order of the shell length and shell height at 15 days old was expressed as CC>CK>KK>KC, with survival rate of(33.00±3.51)% in group CK and(13.40±4.45)% in group KC.In the juvenile period, the 90 and 120 days old hybrids had heterosis of growth and survival, with the maximal shell length(16.91%)in 90 days old hybrids and the maximal shell height(12.53%)in the 120 days old hybrid, the maximal survival rate in 120 days old hybrid in group KC(79.82±1.02)%, and the minimal survival rate in group KK(65.51±1.58)%.In 45, 90 and 120 days old juveniles, parents in group C had positive general combining ability(GCA)in shell length and shell height, indicating that China Laizhou groups can be used as a good parent equipping with other groups.There was greater special combining ability(SCA)in 90 and 120 days old juveniles in group KC than hat in group CK.The findings indicated that the Chinese Laizhou population as paternal parent and the Korean Sinǔiju population as the maternal parent had a better hybridization effect.
李金龙, 刘越, 车宗豪, 田园, 刘杰, 闫喜武、, 霍忠明、. 菲律宾蛤仔中国莱州群体与朝鲜新义州群体杂交子代早期生长发育[J]. 大连海洋大学学报, 2020, 35(2): 190-196.
LI Jinlong, LIU Yue, CHE Zonghao, TIAN Yuan, LIU Jie, YAN Xiwu, HUO Zhongming, ?. Early growth and development of hybrid Manila clam Ruditapes philippinarum cultured between Laizhou population in China×Sinǔiju population in north Korea. Journal of Dalian Ocean University, 2020, 35(2): 190-196.
2020, Vol. 35 
