通径分析(Ⅰ)——基本步骤

<正> 在遗传育种工作中,常常要研究多个数量性状间的关系,从统计学上讲,就是要研究多个相关变量间的关系。通径分析是研究多个相关变量间关系的有力工具。本文扼要阐述通径分析的基本原理,指出进行通径分析的依据与基本步骤,并举例说明之。

Path Analysis(Ⅰ)——Fundamental steps

Fundamental principles and steps of path analysis for the correlated characters are outlined. Assuming that y and x_1,x_2……,xm xm have linear relation, the regression eguation an be written as follows: y=b_0+b_1x_1+b_2x_2+…+b_mx_m. The steps of path analysis for y and x_1、x_2、……、x_m are given belo w: 1. Coefficients of correlation r_xi_xi, r_xiy are calculated, (i, j= 1, 2,…,m;i