粳稻米粒延伸性的QTL剖析  

QTL Dissection of Cooked Rice Elongation in Rice(Oryza sativa L.Japonica)

作　　者：姜树坤[1] 黄成[1] 徐正进[1] 陈温福[1] 

机构地区：[1]沈阳农业大学,农业部作物生理生态遗传育种重点开放实验室,辽宁省北方粳稻育种重点开放实验室,沈阳110161

出　　处：《植物生理学通讯》2008年第6期1091-1094,共4页Plant Physiology Communications

基　　金：辽宁省高等学校优秀人才支持计划(2006R48)。

摘　　要：考察粳稻品种‘沈农265'和‘丽江新团黑谷'为亲本的F_(2:3)群体及双亲的米粒延伸率相关性状,并用该群体的分子连锁图谱进行QTL分析,共检测到8个与稻米延伸性有关的QTL,包括1个米粒型QTL、1个饭粒型QTL、2个延伸率QTL、3个膨胀率QTL和1个延伸指数QTL,分别位于第1、2、6和11染色体,单个QTL对性状表型贡献率在15.4%～37.5%之间。与其他研究结果比较表明,主效QTL在不同群体和不同环境中的重演性较好,这些QTL受水稻籼粳分化这一演化过程的影响较小。QTLs for cooked rice elongation and related characteristics were identified by using the population of 176 F2：3 population derived from a cross between japonica rice ＇Shennong 265＇ and ＇Lijiangxintuanheigu＇. Totally, 8 QTLs for rice elongation traits were identified and mapped on chromosome 1, 2, 5, 6, and 11, respectively. One putative QTL for MRS （milled rice size） was mapped on chromosome 1. One putative QTL for CRS （cooked rice size） was mapped on chromosome 1. Two putative QTLs for ER （elongation ratio） were mapped on chromosome 1 and 2, respectively. Three putative QTLs for WE （width expansion） were mapped on chromosome 2, 6 and 11, respectively. Only one putative QTL for EI （elongation index） was mapped on chromosome 1. Comparison among different studies revealed that QTLs with large effect were easy to be redetected in different populations and environments. These QTLs were influenced little by the Indica-Japonica differentiation.

关 键 词：水稻 QTL 米粒延伸 

分 类 号：S511.22[农业科学—作物学]