覆膜滴灌玉米产量和农艺性状相关性分析

Correlation Analysis of Yield and Agronomic Traits of Maize under Drip Irrigation with Plastic-film Mulching

为明确在覆膜滴灌条件下玉米品系(种)主要农艺性状与产量的关系,应用DPS软件对15个玉米杂交品系(种)的主要农艺性状和产量性状进行相关性、灰色关联度等分析,结果表明:籽粒重、穗重、产量的变异系数较大;玉米产量与生育期、籽粒水分含量、穗重、籽粒重呈显著正相关关系;聚类分析可将参试的15个品系(种)划分为3类,第Ⅲ类表现良好,值得进行推广种植。灰色关联度分析表明,玉米籽粒重、穗重、生育期、籽粒水分含量等性状是影响玉米产量的主导因素,在玉米高产育种中,应以其为主攻目标,提高玉米后代的有效选择,加速高产育种进程。

In order to clarify the relationship between main agronomic traits and yield of maize lines （varieties）,this paper carried out correlation and gray correlation analysis on the main agronomic and yield traits of 15 maize lines （varieties） by DPS software.The results showed that large variation coefficient existed in grain weight,panicle weight and yield.The maize yield had significant positive correlation with growth period,grain moisture content,panicle weight and grain weight.The 15 tested lines （varieties） could be divided into 3 categories by clustering analysis.Group 3 had excellent performance worthwhile for planting and popularization.Gray correlation analysis indicated that maize grain weight,panicle weight,growth period and grain moisture content were the main factors influencing maize yield.In maize high-yielding breeding,they should be the major targets for improving the effective selection of maize progeny,and accelerating the process of high-yield breeding.