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随机测定了70尾池养克氏原螯虾全长(X1)、头胸甲长(X2)、头胸甲宽(X3)、头胸甲高(X4)、第1～6腹节长(X5～X10)、尾节长(X11)及体质量(Y)共12个指标,采用相关分析和通径分析方法,计算了以形态性状为自变量对体质量为依变量的相关系数、通径系数和决定系数。结果表明,克氏原螯虾11个形态性状与体质量的相关系数均达到极显著水平(P<0.01);头胸甲宽对体质量的直接影响(0.522 0)最大,其次为尾节长(0.452 4),均达极显著水平(P<0.01);头胸甲长对体质量的直接影响(0.164 1)仅次于头胸甲宽和尾节长,虽未达显著水平(P>0.05),但显著高于其他性状对体质量的直接作用,是克氏原螯虾选择育种中值得关注的另一性状;最后建立的以体质量为依变量的多元线性回归方程为Y=-16.841 5+8.996 9 X3+13.510 8 X11。
The total length (X1), the carapace length (X2), the carapace width (X3), the carapace height (X4), the length of the first to sixth abdominal segments (X5 ~ X10), tail length (X11) and body weight (Y). Correlation coefficients were calculated by using correlation analysis and path analysis. Coefficient and coefficient of determination. The results showed that the correlation coefficients of 11 morphological traits and body weight of Procambarus clarkii reached extremely significant level (P <0.01). The direct influence of head and chest armor width (0.522 0) was the largest, followed by the tail length ( (P <0.01). The direct influence of the carapace length on the body weight (0.164 1) was second only to the carapace width and camber length, although it did not reach the significant level (P> 0.05) ), But significantly higher than other traits on the body weight of the direct effect of Procambarus clarkii breeding is worthy of attention to another trait; the final established by the body mass dependent variable multivariate linear regression equation Y = -16.841 5 +8.996 9 X3 + 13.510 8 X11.