黑龙江省玉米品质性状与农艺性状的灰色关联分析

Grey Relational Analysis on Agronomic Traits and Quality Traits of Maize in Heilongjiang

选取黑龙江省中、晚熟玉米对照品种及杂交组合共160份,采用灰色关联分析方法,对影响玉米营养品质(脂肪、蛋白质和淀粉含量)的主要农艺性状进行研究。结果表明:不同品质性状与农艺性状关联程度差异不大,最大关联度均小于0.9;同一农艺性状与不同品质性状关联程度不同,穗粗与脂肪和淀粉含量关联序相同,均排在第二位,但关联度存在一定差异。品质育种应侧重穗粗与株高较佳的种质,其次选择生育期、行粒数与出籽率适宜的材料,协调其它农艺性状,改良玉米营养品质。试验明确了玉米主要农艺性状与营养品质的关联程度,为品质育种提供理论依据。

160 middle and late-maturity control varieties were used to analyze the contribution of major agronomic by grey relational analysis. The results showed that ：The and crossing combinations in Heilongjiang province traits to quality traits（oil, protein and starch content） differences of the correlating degrees between different quality traits and agronomic were not significant, all the three largest correlating degrees were less than 0.9. Correlating degrees of an agronomic trait to different quality traits were different. The correlative order of ear diameter to oil content and starch content both were second, but the correlating degrees were different. These results indicated that the maize breeding should focus on directional selecting of plant height and ear diameter, followed by growth duration, grain number per row and produce grain rate, combining with other traits to improve the quality of maize. It defined the correlative degree of main agronomic traits and quality traits aim to offer reference for breeding maize hybrid with good quality and high yield.