闽-粤东族与岱衢族养殖大黄鱼的遗传多样性研究

运用形态学和RAPD等方法对舟山岱衢族和连江闽-粤东族大黄鱼养殖群体的遗传多样性进行了研究.结果显示:两养殖群体之间的差异并未达到亚种水平,但在全长/体长、体长/体高、口裂长/头长、眼径/头长和肥满度5个指标上存在显著差异,其中在全长/体长、口裂长/头长、眼径/头长和肥满度4个指标上的差异达到极其显著水平,两养殖群体属于不同地理种群;所检测的闽-粤东族养殖群体的遗传相似系数为0.923～0.987,平均0.962,遗传差异度为0.038 1;岱衢族养殖群体的遗传相似系数为0.874～0.982,平均0.949,遗传差异度0.061.两养殖群体之间的遗传距离为0.005 1,遗传多样性水平都较低,而其亲缘关系比较密切.

Studies on Genetic Diversities of Dai-ju Stock and Min-yue Stock Pseudosciaena crocea(Richardson)

Genetic diversities of reared Pseudosciaena crocea(Richardson) collected from Zhoushan(Dai-ju) stock of Zhejiang province,and Lianjiang(Min-yue) stock of Fujian province were analyzed by the ways of morphological measurement and random amplified polymorphic DNA(RAPD).The results were as follows:(1) The differences between two reared stocks didn't get to the sub-species level,but there were significantly differences in five indexes(p<0.05): TL/BL(Total length/Body length),BL/BH(body length/body high),ML/BL(mouth length/body length),ED/HL(eye diameter/head length),and relative fatness,furthermore,the differences in the five indexes above except BL/BH(body length/body high) got to extremely significantly difference level(p<0.01),so the two tested reared stocks might belong to different geographical populations.(2) The genetic similarity indexes of Lianjiang(Min-yue) stock tested were 0.923~0.987,average of 0.962,and 0.0381 of the genetic diversity;while those of the Zhoushan(Dai-ju) stock were 0.874~0.982,0.949,and 0.061 respectively.The genetic distance of two cultural stocks was 0.005 1.Therefore,the genetic diversities of both stocks were low,and the genetic distance between them was close.