12个玉米群体的主要农艺性状与产量、品质的灰色关联度分析

Grey Relativity Analysis on Main Agronomic Characters of 12 Maize Populations with Their Yields and Traits

为了明确玉米群体主要农艺性状与产量、营养品质的关系,应用灰色关联度分析方法对12个玉米群体的主要农艺性状、产量、营养品质等进行了灰色关联度分析。结果表明:与产量密切相关的农艺性状是出籽率、行粒数、穗粗、百粒质量、株高等;与粗蛋白、粗脂肪、粗淀粉和赖氨酸含量等营养品质密切相关的农艺性状是穗粒数、百粒质量、行粒数、出籽率、穗行数等。根据玉米群体主要农艺性状间的灰色关联度关系,说明在玉米群体产量、营养品质改良的过程中,在保证适当株高的前提下,要注重选育出籽率、百粒质量较高品种,同时不要忽略对玉米群体穗行数、行粒数、穗粗的选择,为选育高产、优质玉米新品种提供科学依据。

In order to define the re]ationship among the agronomic characters and yield and nutrition qualitative of maize population, 12 maize populations was studied with the method of grey correlation degree analysis. The results showed that the most relative agronomic charac, ters to maize yields were seed rate,grain numbers per row,kernel diam-eter,plant height, and lO0-seed weight, etc ; grain numbers of kernel, lO0-seed weight, grain numbers per row, seed rate,and kernel row number were directly bound with content of crude protein,crude fat,crude starch,and lysine. The results of grey relativity among main agronomic characters showed that high seed rate and lO0-seed weight should bepaid more attention on the breeding selection of maize yields and nutritious qualities,and the selection of kernel row number,grain number per row and kernel diameter also need to be laid some stress on,ensuring appropriate plant height. This study provide scientific basis for the maize breeding selection on high yield and quality.