2个玉米优势群体不同发育时期植株性状的密度效应分析  

Effects of Planting Density on Plant Characters of Two Maize Heterotic Populations at Different Developmental Stages

作　　者：李玉玲[1] 唐保军[2] 冯兴跃 魏蒙关[1] 崔庆新[1] 张中伟[1] 陈欢庆[1] 杨国虎[1] 杨美丽[1] 

机构地区：[1]河南农业大学农学院,河南郑州450002 [2]河南省农业科学院粮食作物研究所,河南郑州450002 [3]博爱县农业科学研究所,河南博爱454450

出　　处：《河南农业科学》2009年第12期26-29,共4页Journal of Henan Agricultural Sciences

基　　金：河南省重点科技攻关项目(082102140005)

摘　　要：对2个新构建的瑞德和非瑞德玉米优势群体在2种高密度条件下不同发育时期植株性状的分析结果表明,高密度使大多数植株性状的平均数减小,变异系数增大,有利于提高选择效果;各植株性状的密度效应因群体和发育时期不同而异;高密度条件下茎粗的减小和穗位高的增加,有利于对植株抗倒性的选择。The plant characters of two newly constructed heterotie populations were analyzed at three developmental stages under two high planting densities. The results showed that high planting density decreased the average values of most characters and increased the variation coefficients,which was favorable for improving the result of selection. The density effect of most plant characters varied according to different populations and different developmental stages. The decreased stem diameter and increased ear-height were beneficial to the selection of lodging resistance.

关 键 词：玉米 瑞德群体 非瑞德群体 植株性状 密度效应 发育时期 

分 类 号：S513[农业科学—作物学]