优质蛋白玉米籽粒品质性状组间典型相关性研究

研究优质蛋白玉米籽粒品质性状组间典型相关性结果表明,2个半硬质胚乳奥帕克-2玉米群体(“中群14QPMC3”和“陕综5号QPMC0”)籽粒物理性状中硬质度、籽粒密度、百粒重与胚比、百粒体积呈负相关效应,营养品质中赖氨酸含量、蛋白质品质性状为其核心,籽粒密度(或硬质度)可作为蛋白质品质的间接选择指标;籽粒物理性状、蛋白质品质性状在赖氨酸产量构成中起决定性作用,全籽粒蛋白质品质与胚乳蛋白质品质紧密相关,而与胚蛋白质品质无关,高赖氨酸高油分育种相统一。

Canonical correlation among kernel quality characters in top-quality protein maize

The canonical correlations among kernel quality characters in two top-quality protein maize populations('Zhongqun14QPMC_3'and'Shaanzong 5QPMC_0') are studied.The results indicate that the negative correlation effect is shown among hardness,kernel denseness,100-grain weight and bud rate,and 100-grain volume in the physical characters;both lysine content and protein quality are the core characters in the nutrition quality;grain density(or endosperm hardness) is an indirect selecting index of protein quality;grain physical characters and protein quality play an important role in forming lysine;grain protein quality is closely connected with that of endosperm,but it has nothing to do with bud protein quality;and high lysine content and high oil content are unified.