DNA sequences from the mitochondrial gene cytochrome oxidase subunit I （mtDNA CO I） were used to estimate the genetic variability in two wild populations and two cultured populations of the hard shelled mussel, Mytilus coruscus. Thirty haplotypes were identified in the four populations. The cultured populations exhibited a lower number of haplotypes and genetic diversity than those of the wild populations, suggesting that a small number of effective founding breeders contributed to the genetic variation of the cultured populations. No significant differentiation was observed between the cultured population and local wild population, implying that persistent gene flow occurred in these populations. This genetic survey is intended as a baseline for future genetic monitoring of M. coruseus aquaculture stocks.
通过对我国沿海三疣梭子蟹（Portunus trituberculatus）9个野生群体线粒体DNA控制区（putative control region,CR）基因片段和细胞色素氧化酶亚基Ⅰ（COⅠ）基因片段进行扩增和测序,分别得到长度为530bp和584bp的片段。分析结果表明：CR83条序列A＋T平均含量为73.2%,共检测到91个变异位点,83个个体具有66种单倍型（haplotype） COⅠ94条序列A＋T平均含量为62.2%,共检测到34个变异位点,94个个体具有34种单倍型（haplotype）。用MEGA3.1软件构建9个群体NJ分子树,聚类结果显示,黄海、东海、渤海6个群体之间的相对遗传距离比较近,聚为一大支,南海3个群体相对遗传距离比较近,聚为一大支。AMOVA分析表明,群体间的遗传分化指数（Fst）为-0.07454-0.27087,其中部分群体间达到显著差异（P〈0.05）与极显著差异（P〈0.01）,说明我国三疣梭子蟹不同野生群体间存在一定遗传分化。
