毛蚶天津群体形态性状对体质量的影响研究

Effects of shell morphological traits on total weight in Scapharca subcrenata Lischke from Tianjin

为探讨形态性状对体质量的影响,指导毛蚶的选育,以毛蚶天津群体为研究对象,测量壳长、壳宽、壳高、体质量,并进行统计分析。结果表明,壳宽是体质量的主要影响因子,其与体质量的相关系数为0.953,直接作用为0.505,间接作用为0.448,壳长、壳高间接作用分别为0.483、0.480,综合决定系数为0.706 6。毛蚶体质量多元回归方程为Y=-40.8+0.438X1+1.124X2+0.469X3,R^2=0.924;以壳宽为自变量,体质量回归方程为:Y=5.443×10^-3X2^2.519,R^2=0.937。

In order to guide the selective breeding of Scapharca subcrenata Lischke, this paper studies the correlation between subcrenata morphological traits and their total weight. Four traits of wild subcrenata samples in Tianjin were employed:shell length(X1), shell width(X2), shell height(X3) and total weight(Y). Statistical analysis showed that the shell width was the main factor of the total weight. The correlation between shell width and total weight was 0.953, including direct effect(0.505) and indirect effect(0.448). The indirect effects of shell length and shell height on total weight were 0.483 and 0.480,respectively. The general determination coefficient of shell width on total weight was 0.706 6. To estimate total weight, the multiple regression equation is evolved:Y=-40.8+0.438X1+1.124X2+0.469X3, R^2=0.924;while the regression equation with shell width as independent variableis: Y=5.443×10^-3X2^2.519, R^2=0.924.