不同产量水平下玉米主要性状的遗传相关和通径分析

遗传相关分析表明,结实长、穗长、行粒数与轴粗、穗粗、穗行数是最主要的因素。高产水平下结实长起最主要的促进作用,穗粗起最主要的限制作用。通径分析表明,单穗粒重主要受果穗的长度和粗度影响,在高产水平中结实长起着最重要的作用。选育高产组合时,要重视果穗结实长和穗行数的选择。

The Hereditary Correlation and Path Analysis of Main Characters in the Maize at the Different Yield Levels

The analysis of hereditary correlation coefficients of 11 characters with kernel weight of single ear showed that the characters including length of bearing kernel,ear length and kernel number per row were in the most principal contradiction with the characters including axle diameter,ear diameter and row number of ear.Length of bearing kernel played the most important positive part and ear diameter played the most important negative part in high yield level.The analysis of hereditary path coefficients of 11 characters with kernel weight of single ear indicated that kernel weight of single ear was mainly affected by the length of ear and the diameter of ear,and length of bearing kernel played the most important part in high yield level.When selecting high yield combination,it must be paid attention to selecting characters of length of bearing kernel and row number of ear.