稻米垩白与直链淀粉含量的数量性状位点及其相互关系研究  

STUDY ON QTLs OF CHALKINESS AND AMYLOSE CONTENT AND THEIR CORRELATION IN RICE

作　　者：吴顺[1] 李晓方[2] 萧浪涛[1] 毛兴学[2] 肖昕[2] 

机构地区：[1]湖南农业大学植物激素重点实验室,湖南长沙410128 [2]广东省农业科学院水稻研究所水稻育种新技术重点实验室,广东广州510640

出　　处：《华南师范大学学报（自然科学版）》2005年第1期90-94,共5页Journal of South China Normal University(Natural Science Edition)

基　　金：国家自然科学基金重大项目(39893350);广东省自然科学基金项目(020384;36745)

摘　　要：用七丝占/外选35重组自交系(Recombinantinbredlines,简称RILs群体)为材料,对控制稻米垩白和直链淀粉含量的数量性状位点(QTLs)及其相互关系进行了分析.共检测到2个控制直链淀粉含量的QTLs,位于第6染色体上;在第2和第6染色体上检测到4个与稻米垩白有关的QTLs,说明稻米垩白和直链淀粉含量两个性状均为多基因控制的数量性状.通过对稻米垩白与直链淀粉含量的表型相关分析和条件性状分析表明,稻米垩白与直链淀粉含量间存在一定程度的正相关关系.Quantitative trait loci (QTLs) controlling chalkiness and amylose content and their correlation were analyzed in a recombinant inbred lines (RILs population) derived from a cross of Qisizhan×Waixuan 35 by SSR marker analysis. Two QTLs for amylose content were detected on chromosome 6, while four QTLs for chalkiness were identified on chromosome 2 and chromosome 6. This showed that the chalkiness and amylose content were quantitative traits controlled by several genes. The phenetic correlation analysis and conditional trait analysis between chalkiness and amylose content showed that these two quantitative traits were positively correlated.

关 键 词：直链淀粉含量 数量性状位点 稻米垩白 关系研究 表型相关分析 QTLS 重组自交系 多基因控制 正相关关系 相互关系 染色体 分析表 检测 

分 类 号：S511[农业科学—作物学] G114[文化科学]