日本镜蛤(Dosinia japonica Reeve)壳尺寸与重量性状的相关与回归分析

摘要

采用相关分析、共线性分析、多元回归分析及通径分析的方法对日本镜蛤(Dosinia japonica)的壳尺寸性状与重量性状间的关系进行了研究.相关分析结果表明,所测量的日本镜蛤的各性状间均呈极显著的表型相关(P＜0.01)；共线性分析剔除了与各壳性状存在严重共线性的壳长；通径分析表明,壳高和壳宽是直接影响体重和壳重的主要性状,壳宽和b(壳顶至壳后)是直接影响软体部重和软体部干重的主要性状,而直接影响体积的壳尺寸性状只有壳高；采用逐步回归的方法,建立了壳尺寸性状对体积和重量性状的最优回归方程,可为日本镜蛤的养殖和选择育种提供理论依据.%In this study,correlation analysis,collinearity analysis,multiple regression analysis and path analysis were used to investigate the relationship between shell size and weight of Dosinia japonica Reeve.Correlation analysis show that all the measured traits were significantly correlated with each other (P＜0.01).Shell length was excluded by collinearity analysis for its high collinearity with other independent variables.Path analysis show that,shell height and shell width had dominant direct effects on both body weight and shell weight.Shell width and b (umbo to back end) had dominant direct effects on both meat weight and dry meat weight.While only shell height had a dominant direct effect on body volume.Optimal regression equations were established by stepwise regression method with shell size traits as independent variables,body volume and weight as dependent variables.The conclusions above could provide theoretical tools in culture and selective breeding in D.japonica Reeve.