影响苜蓿产草量相关性状的通径分析

Path Analysis of Correlation Traits Affecting Yield of Single Alfalfa Plant

研究了31个国内外优良苜蓿品种单株产量与相关性状间的关系。经分析,单株产量与各性状的相关系数均达极显著或显著水平。以8个相关性状为自变量,以单株产量为因变量,采用通径分析方法计算了各自变量与依变量的通径系数和偏相关系数。茎粗、单株分枝数对产量的作用既有直接正效应,也有间接正效应且偏相关系数达显著水平。茎粗、单株分枝数具有较大的决策系数,对产量起主要决定作用;节间数最小,为主要限制因子。

The correlations of correlation traits and yield of single alfalfa plant of thirtyone excellent alfalfa varieties were studies. The correlation coefficients were calculated. The results showed that there was significant positive correlation. The correlation traits were used as independent variables and yield of single plant was used a dependent variables for Path Analysis. The results showed stem diameter and the number of shoots per stem have direct positive effect and indirect positive effect on yield of single alfalfa plant, their partial correlation coefficient were significant correlation. They have large decision coefficient and become a principal decision variable, number of internodes of per stem have minor decision coefficient and become a principal restricted variable.