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Genetic Diversity of Hydra robusta in Heilongjiang Province by RAPD Analysis
Author(s): 
Pages: 152-156
Year: Issue:  2
Journal: ZOOLOGICAL RESEARCH

Keyword:  强壮水螅遗传多样性RAPD聚类分析;
Abstract: 应用RAPD技术对黑龙江省10个分布区17个种群的强壮水螅(Hydra robusta)进行了遗传多样性分析.从80个随机引物中筛选出19个引物,共扩增出320条带,分子量在0.3~3.0 kb,其中多态性带数299个,占93.44%,表现出高度的遗传多样性.17个种群的遗传相似系数(GI)平均值为0.7158,相应的遗传距离(GD)平均值0.3425;分布区内种群间的差异(GD平均值0.1695)小于各分布区间种群间的差异(GD平均值0.3425),各种群间的遗传距离与它们的地理间距基本一致;但虎头种群与其他种群间的相似度明显偏低(GI平均值0.5413,GD平均值0.6161),视为较特化种群.
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