对玉米的耐密性及选育耐密品种的探讨

Study on the Density-resistant Property of Maize and Breeding its Varieties

本文从育种角度探讨了玉米的耐密性及玉米的边际效应指数 ,并研究了产量边际效应指数与穗部各性状的边际效应指数之间的关系。结果认为 ,玉米的耐密性是重要的农艺性状 ,选育耐密品种已成为重要的育种目标之一。边际效应指数可以作为选择耐密品种的指标。穗长、穗粗、行粒数、百粒重、粒深、出籽率等性状的边际效应指数与产量边际效应指数呈显著正相关。

Density-resistant property of maize and its marginal effect index were discussed,the relationship of marginal effect between yield and every ear character was studied The result showed: the density-resistant property of maize is an important agronomic character Breeding variety with density_resistant was one of important breeding target the marginal index may be one of breeding variety with density_resistant target The marginal effect index between yield and ear length, ear thick,grain number per row, weight per hundred grain, grain length, rate of grain have significant positive correlation, and the correlation of marginal effect index between yield and row number per ear is not significant