浙江乐清湾缢蛏的形态和遗传多样性

采用形态学、SRAP两种标记对浙江省乐清湾6个,及采自福建、江苏及山东等中国沿海4省共11个缢蛏群体进行比较分析,形态学分析结果显示:(1)福建竹塔群体和浙江乐清湾5个野生群体有较大的相似性,聚成一支,乐清湾养殖群体没有与野生群体聚为一支;(2)11个群体平均判别准确率为82.4%;(3)壳顶点到体前端(BD)、背前端到腹前端(BH)、背前端到背后端(AC)3项负荷值比较大,是重要的特征参数。SRAP分析结果表明:(1)浙江乐清雁湾野生群体遗传多样性高,其Shannon多样性指数均值为0.481 4,浙江以外区域的为0.402 8,前者比后者高16.3%;(2)乐清湾群体聚成一支。2种标记研究结果同时表明浙江乐清湾野生群体之间具有较高的形态和遗传相似性。

Morphologic and genetic diversity of Sinonovacula constricta populations from Yueqing Bay, Zhejiang

Six populations of Sinonovacula constricta came from Yueqing Bay, Zhejiang and other five populations from Jiangsu and Fujian Provinces. Based on the morphologic data, the population from Fujian Zhuta is more similar to five wild populations of Yueqing Bay; The mean of discrimination accuracy of 11 populations is 82.4%, the eigenvector-loading values from Front-end of dorsal to Front-end of dorsal, from Front-end of dorsal to Back-end of dorsal, and from Beak to Anterior of body are higher than other parameters, and they all are the important to distinguish populations. SRAP analysis on 11 populations shows the genetic diversities of wild populations from Yueqing Bay are relatively high with mean Shannon''s index 0.481 4, and the mean Shannon''s index of other populations is 0.402 8; All six populations from Yueqing Bay gathered into one branch. Together, the morphology and SRAP both showed that the wild populations of Yueqing Bay were more highly similar.