玉米产量性状与产量的相关性及通径分析

Correlation and Path Analysis of Yield and Yield Characteristics of Maize

为探讨玉米主要农艺性状对单株产量的影响及相互关系,本文以9个玉米品种为材料,分析穗高系数、穗位叶面积、穗长、秃尖长、穗粗、穗行数、行粒数、百粒重、出籽率的变异系数及其与单株产量的相关性和通径系数。结果表明:秃尖长在玉米品种选育过程中的变异程度大,选育潜力也较大;各性状与玉米单株产量的相关性从大到小依次为穗长>穗位叶面积>行粒数>穗行数>穗粗>百粒重;通径分析结果表明:各性状对产量的直接贡献的大小依次为穗长>行粒数>穗行数>穗位叶面积>穗粗>百粒重。在选择时,要协调好各性状之间的关系,着重于穗长、穗位叶面积、行粒数、穗行数、穗粗、百粒重的选择,可放宽秃尖长、穗高系数和出籽率的选择。

In order to investigate the effect of main agronomic characters of maize on yield per plant and their correlation,in this paper,nine maize variety were applied to elucidate the yield performance and the correlation between yield per plant and yield characteristics based on the ten economical traits(i.e.spike position height coefficient,ear leaf area,ear length,bare tip length,ear diameter,ear rows,row grains,100-kernel weight,kernel rate and yield per plant)of maize.The results showed that the variation of bald tip length in maize breeding process was large and the breeding potential was also large.The correlation between traits and maize yield per plant was ear length>ear leaf area>row grains>ear rows>ear diameter>100 grain weight.Path analysis showed that the direct contribution of each trait to yield was as follows:ear length>row grains>ear line rows>ear leaf area>ear diameter>100-grain weight.When selecting,the relationship of these characters must be well coordinated.Ear length,ear leaf area,row grains,ear rows,ear diameter,100-kernel weight should be given more emphasis.Bare tip length,spike position height coefficient,and kernel rate came second.