华南热带地区玉米主要数量性状对产量的效应分析比较

Comparative Analysis of Main Quantitative Characters and Yield Maize in the Huanan Tropical Area

对华南热带地区春秋两季玉米的9个数量性状与产量进行相关和通径分析,为华南热带地区选育玉米高产品种提供理论依据。结果表明:华南热带地区春秋两季选育玉米高产稳产品种应重视生育期较长、出籽率高和穗粗大等性状的选择,秃尖长应尽量避免。春季玉米株高、穗位高和穗行数的选择可适当放宽;秋季玉米穗位高的选择不容忽视,株高应尽量降低,穗行数可适当放宽。

Analyzed the correlation and path of quantitative characters and yield of 9 maize on spring and autum in the Huanan tropical area, which could provide academic basis for breeding high yield maize varieties in Huanan tropical area. The results showed that we should pay more attention to breed longer growth period, high grain yield, big ear and avoid bare tip while selecting high and steady yield varieties on Spring and Autumn maize. The selection of plant height, ear height and rows per ear could be broadened in spring, the selection of ear height could＇ t be neglected, plant height should be decreased and the selection of rows per ear could be broadened in Autum.