大理州29个玉米品种(系)产量比较及主要农艺性状关联度分析

为了解大理州玉米品种主要农艺性状间的关系,进而指导育种实践,本文采用灰色关联度分析方法对大理州29个玉米品种(系)产量及主要农艺性状关联度进行了比较分析。结果表明:9-5、卓玉299、海玉92号的产量较其他玉米品种(系)相对要高;玉米品种(系)的产量与主要农艺性状关联度大小为:百粒质量出籽率行粒数穗粗穗行数穗长秃尖生育期株高穗位;在育种实践中,在着重选择与产量紧密度高的农艺性状的同时,也要协调好各农艺性状间的主次关系。

Yield Comparison of 29 Maize Lines (Varieties)Planted in Dali and Correlation Analysis of their Main Agronomic Characters

This research aimed to determine the relationships among the main agronomic characters of maize lines cultivated in Dali, which will be instrumental in future breeding practices.Between late March to August,2015,29 maize lines (varieties)were planted in Dali to compare their yields,and the relationships among their main agronomic characters were investigated using grey correlation analy-sis.As a result,three lines (9-5,Zhuoyu 299,and Haiyu 92)achieved significantly higher yields than the other tested lines.More-over,grey correlation analysis revealed that different agronomic characters of maize lines were correlated with yield in varying degrees, ranking from high to low as follows:100-kernel weight>shelling percentage>kernel number per row>ear diameter>row number per ear>ear length>bare tip length>growth period>plant height>ear height.The agronomic characters of maize that are closely related to yield should be given priority in future practices for breeding high-yielding maize;meanwhile,the relationships existing among dis-tinct agronomic characters should also be taken into consideration.