普通×爆裂玉米RILs群体籽粒不同发育时期品质性状及其相关分析  

Analysis of Grain Nutritional Quality Traits at Different Stages and Their Correlations Using RILs Population

作　　者：杨美丽[1] 李玉玲[1] 崔庆新[1] 李俊周[1] 

机构地区：[1]河南农业大学农学院,郑州450002

出　　处：《中国农学通报》2010年第10期128-132,共5页Chinese Agricultural Science Bulletin

基　　金：河南省新世纪优秀人才支持计划项目(2005HANCET-12)

摘　　要：为了探索籽粒品质性状的动态发育规律和相关性,为相关性状的分子发育机理解析和遗传改良提供理论依据。利用普通玉米自交系丹232与爆裂玉米自交系N04为亲本构建的重组近交系（RILs）群体为材料,对籽粒不同发育时期的粗蛋白、粗淀粉、粗脂肪和赖氨酸4个品质性状分析。结果表明：RILs群体各时期4个品质性状均存在明显的超亲分离;亲本、F1及RILs群体的粗蛋白、粗脂肪及赖氨酸含量从授粉后10~30天持续下降,至灌浆后期又表现不同程度的升高,而粗淀粉含量在整个发育时期持续增加。除粗蛋白含量授粉后10天与40天间、粗脂肪含量授粉后10天与30天间不相关外,其余各性状在不同发育时期均表现为显著或极显著正相关。粗淀粉与粗蛋白、粗脂肪及赖氨酸在4个时期表现为极显著负相关,其余性状间均表现为极显著正相关。因此,在玉米品质育种中,应注意协调各性状间的相互关系。Studied on the dynamical development regularity and correlation of grain quality traits; provided theoretical basis for analysis related traits molecular development mechanism and genetic improvement. Two hundred and fifty-nine RILs were developed from the cross between a dent corn inbred D232 and a popcorn inbred N04. The variation of 4 nutritional quality traits at different stages were analyzed, including crude protein （CP）, crude starch （CT）, crude fat （CF） and crude lysine （LS）. The results showed that there were obvious segregations beyond the two parents for all nutritional quality traits among RILs. For parents, F1 and RILs population, CP, CF, and LS were continuously decreasing from 10 days after pollination to 30 days, only slight difference of the decreasing range were observed. However, the content increased differently at late grain filling stage. For CT, there was consistent increase during the whole growth stages. All traits showed normal distributions. Except correlations for CP at 10 days after pollination with 40 days and CF at 10 days after pollination with 30 days, other nutritional quality traits at different stages were significant or highly significant positively correlated. CT was highly negatively correlated with CP, CF and LS at four stages, the other traits were all highly positively correlated. So, it was important to pay attention to the relationships among several traits in maize quality breeding.

关 键 词：普通玉米 爆裂玉米 重组近交系 不同时期 品质性状 

分 类 号：S184[农业科学—农业基础科学]