中文摘要：

应用RAPD技术对鄱阳湖区5种不同体色黄鳝进行了遗传多样性研究,结果发现,该物种种群总基因多样性（Ht）为0.272 4,各群体内的基因多样性（Hs）为0.194 8,占总群体基因变异的71.51%,提示鄱阳湖黄鳝具有较高的遗传多样性,且遗传变异主要存在于群体内。结果还发现,5种不同体色黄鳝群体间的遗传距离在0.040 0～0.180 1之间,其中细花斑群体与黄黑斑群体之间的遗传距离最小,大花斑与隐花斑之间的遗传距离最大;群体间的遗传分化系数（Gst）为0.284 9,这表明,5种不同体色群体间存在明显的遗传分化。

英文摘要：

RAPD method was applied to study the genetic diversity of five different brindled populations of M.albus in Poyang Lake.170 loci were detected with 13 primers,134 loci of which（78.82%） were polymorphic.The total genetic diversity（Ht） of M.albus was 0.272 4,indicating that this species has high level genetic diversity.The average genetic diversity within the population（Hs） was 0.194 8,accounting for 71.51% of the total genetic variation,which indicates that the genetic variation mainly within the population.The genetic distance between small-brinded and black-yellow brinded is the smallest（0.040 0）,while that between big-brinded and hidden-brinded is the largest（0.180 1）.The results show that the genetic diverse and the gene flows were existed in the M.albus population of Poyang Lake.