我国东南沿海5个织锦巴非蛤地理群体的形态差异分析

采用聚类分析、主成分分析和判别分析3种分析方法,对我国东南沿海5个织锦巴非蛤群体11个形态性状进行比较研究.聚类分析和主成分分析结果表明,海南三亚与福建厦门群体的形态较近,广东的湛江、深圳和汕头3个群体的形态最近,而这5个地理群体又很明显地分为2组.主成分分析构建了3个主成分,其贡献率为:第一主成分为37.489％,第...

Morphological Variation Analysis of Five Different Geographic Populations of Paphia textile Along South China Sea

The multivariation analysis methods （cluster analysis, principal component analysis and discriminate analysis） were used to compare the eleven morphological characters of five populations of Paphia textile in Zhan- jiang, Shenzhen, Shantou, Sanya, and Xiamen. The results of clusters analysis and principal component analy- sis indieated that the morphological characters were similar among the populations in Sanya and Xiamen, while the polulations in Zhanjiang, Shenzhen and Shantou were morphologically grouped together, all of which were apparently divided into two groups. Three principal components were constructed by the principal component a- nalysis method, the contributory ratio of the first principal component was 37. 489% ; that of the second principal and the third principal were 17. 803% and 10. 704%, respectively; the cumulative contributory ratio was 66. 005%. Then, the discrimination functions of the five populations were set up, the identification accuracy was 43.3% -66.7% （P1） and 43.5% -72.7% （P2）. The total discriminate aeeuraey was 5＂2.6%. These data suggested that the morphological variations of Paphia textile were resulted from the joint effects of genetic compo- nents and environment, Combined with studies of molecular genetics, genetic characteristics of the five popu- lations will be described more exaetly, which can provide science basis for germplasm resources protection and genetic breeding.