水稻苗期发根力的QTL和上位性分析  

QTL Mapping and Epistasis Analysis of Rice Root Growth Ability at Seedling Stage

作　　者：胡兴明[1] 郭龙彪[1] 曾大力[1] 高振宇[1] 滕胜[1] 李浩戈[1] 朱立煌[2] 钱前[1] 

机构地区：[1]中国水稻研究所水稻生物学国家重点实验室,浙江杭州310006 [2]中国科学院遗传与发育生物学研究所,北京100101

出　　处：《中国水稻科学》2004年第5期396-400,共5页Chinese Journal of Rice Science

基　　金：国家自然科学基金资助基金 (3 0 2 0 80 8) ;国家 863计划资助项目 (2 0 0 3AA2 0 70 3 0 ) ;浙江省人才基金资助项目。

摘　　要：以典型籼粳交 (窄叶青 8号 /京系 17)F1 花培加倍的DH群体为材料 ,采取水上栽培方法 ,考察苗期根系发根力。利用已构建的分子连锁图谱 ,采用基于混合的线性模型复合区间作图法对水稻苗期发根力进行QTL和上位性分析。在第 3染色体的C6 3-CT12 5之间检测到 1个发根力的主效QTL ,同时也检测到影响发根力的 5对上位性效应基因座 ,分别位于第2、3、5、6、7、12染色体上 ,其中影响根长、根数上位性效应各有两对区间 ,有一对既影响根长 ,又影响根数。A doubled haploid (DH) population derived from anther culture of Zhaiyeqing 8 / Jingxi 17 F 1, a typical indica and japonica hybrid, was used to analyze root growth ability of DH population at seedling stage by using floating cultural method. QTLs and epistasis for this trait were identified by using the constructed molecular linkage map and QTLMapperV1 0 software . A QTL controlling root growth ability was detected between C63 and CT125 on chromosome 3. Five pairs of epistatic loci associated with root growth ability were located on chromosome 2, 3, 5, 6, 7 and 12, respectively. Two pairs of epistatic loci for root length and root number were detected, respectively. One of them was simultaneously identified both in root length and root number.

关 键 词：水稻 苗期发根力 QTL 上位性分析 数量性状位点 

分 类 号：S511[农业科学—作物学]