舟山鮸鱼群体遗传多样性的AFLP研究

利用AFLP分子标记技术对舟山近海海域野生亲代和人工繁育子一代(F1)的2个鮸鱼(Miichthysmiiuy)群体遗传多样性进行分析研究。结果表明:8对选择性引物在2个群体60个个体中,共扩增出505条清晰条带,其中多态片段为369条,总的多态位点比例为73.07%。亲代和F12个群体的多态位点数,多态位点比率,Nei’s遗传多样性指数和Shannon信息多样性指数分别为367、349、72.51%、68.86%、0.422 2、0.4139。两群体内遗传相似系数亲代为0.987 6,子代为0.971 5。鮸鱼亲代群体的Nei’s遗传多样性指数、遗传相似度和Shannon信息多样性指数比子代群体的都要高。群体间的遗传相似系数和遗传距离分别为0.979 6、0.020 6;基因分化系数Gst为0.022 3,群体间无显著遗传分化;经分子方差(AMOVA)分析,结果表明97.78%的遗传变异来源于群体内个体间,群体间无显著遗传变异。

Comparative studies on the molecular genetic diversities between the Zhoushan wild Miichthys miiuy and their early filial generation by AFLP markers

Genetic diversity of a wild population and an artificial breeding population of Miichthys miiuy was investigated with amplified fragment length polymorphism(AFLP).The wild population was caught with cast net in the East China Sea near Zhoushan,and the cultured population was artificial breeding offspring of the wild population which was the first filial generation(F1).Eight EcoR I and Mse I primers combination produced 505 clear bands,of which 369 bands were polymorphic loci.The overall proportion of polymo...