关键词: 玉米, 覆膜滴灌, 农艺性状, 产量, 灰色关联度分析

Abstract: 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.

Key words: maize, drip irrigation with plastic-film mulch, agronomic traits, yield, gray correlation analysis