摘要
[目的]探讨利用染色体参数进行聚类分析,以期在细胞水平上对双壳贝类进行分类。[方法]根据染色体相对长度、臂比,以及它们的平均值、方差、极差、标准差等参数,计算了13种双壳贝类之间的核型似近系数(λ),用UPGMA法对它们的亲缘关系进行了聚类分析。[结果]贻贝科、扇贝科的λ(0.980 0,蛤蜊科的λ(0.950 0,聚类结果与传统的形态学分类相吻合;帘蛤科的文蛤、菲律宾蛤仔和紫石房蛤三者聚为一类,而它们与青蛤、日本镜蛤的亲缘关系较远。[结论]聚类分析法可以弥补传统形态学分类的某些不足,有助于人们了解近缘种之间的亲缘关系,它为研究双壳贝类的系统演化和数值分类,提供了有效的手段。
[ Objective ] The aim of the research was to discuss the cluster analysis of chromosomes so as to classify bivalve in the cell level. [ Method ] The karyotype resemblance-near coefficients （λ） among the thirteen bivalves were computed according to the relative length and ann ratio of chromosomes, their average, mean square, extreme margin and standard deviation. The kindredship of thirteen bivalves were analyzed with the method of UPGMA. [ Result] λ 〉 0.980 0 in the Mytilidae and the Peetinidae, λ 〉 0.950 0 in the Mactridae were ontainded. The results of cluster analysis were consistent with the traditional morphological taxonomy. Meretrix meretrix, Ruditapes philippinarum and Saxidomus purpuratus of the Veneridae were in one group, but they estranged from Cyclina sinensis and Dosinia japonica. [ Conclusion] The method of cluster analysis could make up some deficiency of traditional morphological taxonomy, and would redound to find out consanguineous connection among the kindred species. The cluster analysis provided an effective method for the research on phylogenesis and numerical taxonomy of bivalve.
出处
《安徽农业科学》
CAS
北大核心
2008年第26期11357-11358,11372,共3页
Journal of Anhui Agricultural Sciences
基金
鲁东大学研究生教育项目(YD05007)
