牙鲆家系的建立及早期生长比较

Establishment of Japanese Flounder (Paralichthys olivaceus) Families and Comparison of Their Growth Traits in Juvenile Stage

以东海舟山海域野生牙鲆群体为亲本,采用人工授精技术,共构建14个牙鲆家系,分别测定了各家系120日龄30个个体的全长、体长和体重,对家系间的生长和家系内的个体体重变异进行了比较。结果表明:不同家系间的全长、体长和体重的差异均极显著(P<0.01)。家系1、3、4、10、11和14为生长较快家系,按体重大小依次排列为3>10>11>1>14>4,按全长长短依次顺序为3>14>1>4>11>10。家系2内个体体重变异最大。家系3个体体重变异小,其体重平均值要高出体重最小家系35%,表现出明显的生长优势。这一研究为进一步通过家系选育方法培育适合浙江沿岸生长的优良品系奠定基础。

A total of 14 families were established using parents Japanese Flounder from Zhoushan in East China Sea with an artificial insemination.Thirty 120-days-old juvenile fishs were measured in each family for body length,total length and body weigh.The growth traits among families and the individual body weight variations in each family were compared.The results showed that there were extremely significant differences in the total length,body length and body weight among families.Family No.1,3,4,10,11 and 14 were the faster growth family group.The order was 310111144 by their body weight,and 314141110 by total length.Family No.2 had the largest individual body weight variation.Family No.3 had the smallest body weight variation and showed a significant growth advantage.Family No.3′s average body weight was 35% more than the smallest family.The study is helpful for further family selective breeding of Paralichthys olivaceus of Zhoushan population and provide a good breeding material.