玉米果穗主要性状与产量间的相关与通径分析

Correlation and Path Analysis of Main Ear Characters and Grain Yield of Maize

对玉米果穗主要性状与产量间进行了相关通径分析,结果表明,穗长等8个果穗主要性状与产量的相关系数和通径系数除秃尖外,其余均为正值。其中,穗行数对子粒产量的直接通径系数达到1.30042,行粒数达到0.90382。因此,为获得高产玉米品种,应着重注意穗行数和行粒数较多的基因型,同时要协调好穗行数与穗长、粒深、行粒数、百粒重和出籽率以及行粒数与秃尖和穗粗之间的关系。

Correlation and Path of major ear characters and grain yield of Maize were analyzed. The resuhs indicated that correlation coefficient and path coefficient of ear length and other 7 ear characters in grain yield except length of the ear without kernels showed positive value. Among them, directly path coefficient of ear rows with grain yield was 1.300 42, directly path coefficient of kernels per row with grain yield was 0.903 82. So, when selecting high grain yield hybrids of maize, we must pay more attention to select gene types of more ear rows and more kernels per row. At the same time, The relationship of the ear length, kernels length, 100 seeds weight and grain production rate, the relationship of the kernels per row, length of the ear without kernels and ear diameter etc, were important.