栉孔扇贝种群的遗传变异分析

采用不连续聚烯酰胺凝胶电泳技术研究了中国栉孔扇贝和日本栉孔扇贝两个天然种群的六种同工酶。结果表明，两个种群具有基本相同的基因位点控制同工酶的表达，二者都具有居群内的个体差异，中国和日本的两个种群的多态位点比例（P．99）分别为41．18％和45．45％，平均杂合度观测值（Ho)分别为0．1295和0．1531，平均杂合度预期值（He)分别为0．1695和0．2331，各位点平均等位基因数（Ne)分别为1．5294和1．6363。日本栉孔扇贝自然种群的遗传变异明显高于中国栉孔扇贝自然种群。同时各群体中普遍存在杂合子缺失现象。

The Genetic Variation of Scallop, Chlamys farreri

The analysis of two populations of scallop, Chlamys farreri from China and Japan has been investigated using 6 isozymes to determine the genetic variation by polyacrytamide gel electrophoresis(PAGE). The results show that the genetic diversity of Japan population's is higher than China population's. Japan population is possessed of 45.45% of the proportion of polymorphic locus ( P. 99),0.1531 of the mean observed heterozygosity( Ho ),0.2331 of the mean respected heterozygosity( He ). In China population, these values are 41.18%, 0 1295, 0.1695 accordingly. In general, the hybridizition technique between subspecies for improvement of quantitative and qualitative traits is practicable.