魁蚶两个不同群体形态性状对体质量的影响效果分析

The relationship between morphometric characters and body weight of Scapharca broughtonii in two different populations

中文关键词: 魁蚶  形态性状  相关分析  回归分析

英文关键词: Scapharca broughtonii Schrenck  Morphological traits

中文摘要:

      随机选取中国江苏与韩国通营两个不同地理群体魁蚶，分别测量壳长（X1）、壳高（X2）、壳宽（X3）、壳顶宽（X4）、外韧带长（X5）、背缘长（X6）和放射肋宽（X7）等7个形态性状指标并称量活体重（Y），采用多元分析方法分析了各形态性状对体质量的影响效果。结果表明，两群体魁蚶各形态性状对体重的影响效果不同，江苏魁蚶各性状相关性都达到极显著水平，壳长、壳高和壳宽对体重的直接影响和辅助其他性状的间接影响作用较大；通营魁蚶各性状相关性没有全部达到极显著水平，壳长对体重的直接影响和辅助其他各性状间接影响体重的作用最大。经显著性分析，将偏回归系数显著的变量对体质量建立多元回归方程，分别为：江苏魁蚶Y= -77.05+1.366X1+1.306X3和通营魁蚶Y=-108.22+1.979X1+0.964X2，两方程的回归系数均达到极显著水平。

英文摘要:

      To study the difference in morphological characters of the Scapharca broughtonii Schrenck between Jiangsu population and Tonguing population, data for this were collected randomly from the two populations. The shell length（X1）,shell height（X2）,shell width（X3）,Umbo length（X4）,Outer ligament length（X5）,Dorsal edge length（X6）,Radial rib length（X7）,and the live body weight（Y）were measured individually. The correlation between the phenotypic data and the body weight, the direct and indirect effect of body size to body weight were analysed by using correlation analysis and path analysis, and then to establish the regression equation by the morphological characters using as independent variables and the body weight as dependent variable. The results show that correlation coefficients between each phenotypic traits and body weight are all significantly fifferent（ P＜0.01）in the two populations. The shell length（X1） and shell width（X3） give predominant direct and determination indirect on the body weight of Jiangsu population, while for the Tongying population the shell length（X1） and the shell height（X2） are the key factors to affect the body weight. Eliminate the inconspicuousness factor, and establish the multiple regression equation for the the two bloody clam as : 1)For Jiangsu population Y= -77.05+1.366X1+1.306X3;2)For Tongying population Y=-108.22+1.979X1+0.964X2. This study provided a theoretical basis for bloody clam breeding and morphologic study.