西施舌形态性状与体质量性状的相关性分析

为研究西施舌(Coelomactra antiquata)野生群体壳体性状对体质量性状的影响,文章以广西北海铁山港海区采集的178只西施舌为研究对象,测量壳高(SH)、壳长(SL)、壳宽(SW)、前缘长(AL)、后缘长(GL)、壳质量(SM)、软体部质量(VM)、活体质量(BM),以壳体性状(SH、SL、SW、AL、GL、SM)为自变量,体质量性状(BM、VM)为因变量进行相关性分析、通径分析、多元回归分析。结果表明西施舌8个数量性状中,软体部质量变异系数最高,性状间的相关性均达到极显著水平(P<0.01),活体质量和软体部质量分别与壳高和壳质量的相关系数最大(0.831和0.646);壳宽和壳质量分别对活体质量和软体部质量的直接影响最大,通径系数分别为0.362和0.487,决定程度分析与通径分析结果变化趋势一致;建立了关于体质量性状的回归方程(R2<0.85)。

Correlation analysis of morphological traits and body mass traits of Coelomactra antiquata

To evaluate the effects of shell phenotypic traits on the body mass of Coelomactra antiquata wild population,we measured eight traits including shell height(SH),shell length(SL),shell width(SW),anterior length(PL),posterior length(PL),shell mass(SM),visceral-mass mass(VM)and body mass(BM)from 178 individuals of C.antiquata.The shell traits(SH,SL,SW,AL,GL,SM)were used as independent variables and mass traits(BM,VM)as dependent variables for path coefficient and multiple regression analysis.The results show that the maximal coefficient of variance was in visceral-mass mass,with very significant difference in correction coefficients among the eight quantitative traits of C.antiquata(P<0.01),and the correlation coefficients between body mass and visceral-mass mass and that of shell height and shell mass were the highest,with values of 0.831 and 0.646,respectively.Shell width and shell mass had the greatest direct influence on body mass and visceral-mass mass,and the path coefficients were 0.362 and 0.487,respectively,and the degree of determination analysis was consistent with the path analysis results.The optimal multiple regression equations of shell traits on mass traits were established through stepwise multiple regression analysis(R2<0.85).