玉米产量的边际效应及与主要农艺性状的相关分析

Marginal Effect of Yield and Correlation Analysis with Main Agricultural Traits in Maize

研究玉米主要农艺性状与产量边际效应指数的相关性,为选育耐密植玉米品种提供参考。以品比试验中的10个玉米杂交组合为试验材料,对玉米产量边际效应曲线进行拟合,同时对产量边际效应指数与玉米主要农艺性状进行相关分析。结果表明,玉米产量的边际效应曲线符合方程Yi=e-ai,t值及Xc2值均未达到显著水平。玉米产量边际效应指数与穗长、穗粗、行粒数、出籽率等性状的边际效应指数相关性达到显著或极显著水平。穗行数边际效应指数与玉米产量边际效应指数的相关未达到显著水平。由此可见,在选育耐密植玉米品种时,应注重穗长、穗粗、行粒数、出籽率等性状的边际效应,可不考虑玉米穗行数的边际效应。

It is the reference for the breeding of high density variety of maize to study the correlation between marginal effect indexes of yield with main agricultural traits.In this trial,materials were 10 hybrid combinations of maize obtained.The curve of marginal effect of maize yield was fitted.Correlation analysis between marginal effect indexes of yield with main agricultural traits was done.The results suggested that marginal effect of maize yield fit the equation Y i =e-ai.The t value and X c 2 value was all not significant.Correlation coefficients between marginal effect indexes of yield with ear length,ear diameter,kernels per row,and shelling percentage etc traits were significant or very significant.Correlation coefficient between marginal effect indexes of yield with rows per ear was not significant.So,while the density-resistant variety of maize was being bred,marginal effects of ear length,ear diameter,kernels per row,and shelling percentage should be paid attention to.But rows per ear should be not considered.