Abstract:

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 Yi=e-ai. The t value and Xc2 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.