【摘要】 用３１个可重复性好的随机引物对中华绒螯蟹（Ｅｒｉｏｃｈｅｉｒｓｉｎｅｎｓｉｓ）的辽河、瓯江和长江种群进行了ＲＡＰＤ分析。１２１个扩增片段中有２７个多态片段。遗传距离指数（Ｄ）表明中华绒螯蟹种内遗传变异较低（Ｄ＝０００４～００６３）。３个种群中，辽河种群（Ｄ＝００１８）和瓯江种群（Ｄ＝００２５）遗传变异较高，而长江种群遗传变异较低（Ｄ＝００１３）；辽河种群和瓯江种群间遗传距离（Ｄ＝００２３）小于它们与长江种群间的遗传距离（Ｄ值分别为００２８和００３２）。提示人类经济活动可能已使这２个种群发生了基因交流。更多还原

【Abstract】 RAPD was employed to assess the genetic variation among Eriocheir sinensis populations of the Yangtze, Liaohe and Oujiang river systems. 31 random reproducible primers revealed 121 amplified fragments in which 27 were polymorphic. Intraspecific genetic variation was low (D=0.004～0.063). Intrapopulation genetic variation of Liaohe population and Oujiang population were higher than that of Yangtze population while the interpopulation variation between Liaohe and Oujiang populations was lower than that between either of them and Yangtze population. The results suggest that the human economic activities have probably caused gene exchanges between the two populations.更多还原