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利用１５个中晚熟玉米品种的７个主要农艺性状对单株产量的表型值资料，经过简单相关分析和通径分析，探讨各性状与单株产量的关系。从分析结果看出，穗位高、穗粗、行粒数、百粒重与单株产量呈显著或极显著正相关，但对产量贡献较大的是行粒数、百粒重和穗粗。以这几个因子作为选择目标直接选择，并兼顾对其他性状的选择，较易选育出高产品种。
The phenotypic data of seven main agronomic traits of 15 middle and late-maturing corn varieties were used to investigate the relationship between the traits and the yield per plant through simple correlation analysis and path analysis. From the analysis results, ear height, ear diameter, grain number, weight per 100 grain weight per plant yield was significant or very significant positive correlation, but the output is greater contribution to the number of rows, 100 weight and ear diameter coarse . With these factors as the choice of direct choice, and take into account the choice of other traits, easier breeding of high-yielding varieties.