优质肉鸡矮小型母系品系(S_2系)产蛋性状的通径分析

Path Coefficient Analysis on Effect Factors of Laying Traits of Dwarf Female Line(S_2)

以4429只优质肉鸡矮小型母系品系(S2系)核心群个体产蛋数据为试验材料,运用通径分析法研究开产日龄(X1)、开产体重(X2)、开产蛋重(X3)、24周产蛋数(X4)、28周产蛋数(X5)5个产蛋性状因子与43周产蛋总数的关系。结果表明:各性状因子的通径系数分别为-0.17576、0.051788、-0.02997、0.259459、0.597501;28周产蛋数是影响43周产蛋数的主要决定因子。各性状(Xi)对43产蛋数(Y)的最优回归方程为:Y=56.826-0.292X1+0.006X2-0.030X3+0.770X4+3.106X5(P<0.01),总相关系数为0.8760,决定系数为0.7674。

Laying traits data of 4429 dwarf female line（age at first egg,body weight at first egg,egg weight at first egg, egg number at 24 weeks old,egg number at 28 weeks old,egg number at 43 weeks old）were used to analyze correlation coefficient and path coefficient. The results showed that correlation coefficients were -0.17576,0.051788, -0.02997, 0.259459,0.597501,respectively. Egg number at 28 weeks old had a main effect on egg number at 43 weeks old. The path coefficient analysis was revealed the exact relationship between independent variables and dependent variable. We established the best regression equation：Y=56.826-0.292X1＋0.006X2-0.030X3＋0.770X4＋3.106X5. Correlation coefficient and decision coefficient between all traits and egg number at 43 weeks old were 0.8760 and 0.7674,respectively.