钝缀锦蛤形态性状对活体质量的影响

Effects of Shell Morphological Traits on Live Body Weight of Clam Tapes conspersus

为研究钝缀锦蛤形态性状和活体质量之间的关系,随机选取的150粒野生钝缀锦蛤作为试验材料,分别测量其形态性状(壳长x1、壳宽x2、壳高x3)和活体质量(y),采用相关分析和通径分析方法计算形态性状对活体质量的通径系数和决定系数。相关分析结果表明,钝缀锦蛤的形态性状和活体质量之间的相关系数均达到极显著水平(P<0.01),其中壳宽与活体质量相关系数最大(0.970)。通径分析结果表明,壳宽对活体质量的直接作用最大(0.677),其次为壳高(0.184),最小为壳长(0.151)。决定系数分析结果与通径分析结果相一致,壳宽是影响活体质量的主要因素。多元回归分析建立了估计活体质量的回归方程:y=-160.195+0.726x1+4.307x2+0.894x3,r2=0.960。该研究结果为钝缀锦蛤的人工选育和种质资源保护提供参考。

The shell length（x1）,shell width（x2）,shell height（x3）and live body weight（y）of 150 individuals were measured in clamTapes conspersus to study the relationship between the morphological traits and live body weight.The shell morphological traits were used as independent variables,and live body weight used as a dependent variable for the calculation of path coefficients and determinant coefficients by using the correlation analysis and path analysis.The correlation analysis revealed that the live body weight was significantly correlated with the three shell morphological traits（P〈0.01）,and the highest correlation coefficient（0.970）was appeared between shell width and live body weight.The descending order of direct effects of three shell morphological traits on live body weight was expressed as shell width shell height shell length.The determination coefficient analysis showed a similar trend with that of path analysis,and that shell width as the key influencing factor had the greatest direct effect on the live body weight.The determinant coefficient of shell width on live body weight was 0.458.The multiple regression equations were obtained to estimate live body weight as y=-160.195 ＋ 0.726 x1＋ 4.307 x2＋ 0.894 x3,r^2=0.960.The findings provide a basis for the further development of artificial breeding and germplasm resources protection of T.conspersus.