Chinese Journal OF Rice Science

Chinese Journal of Rice Science

• 研究报告 • Previous Articles     Next Articles

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

HU Xing-ming1; GUO Long-biao1; ZENG Da-li1; GAO Zhen-yu1; TENG Sheng1; LI Hao-ge1; ZHU Li-huang2; QIAN Qian1; *   

  1. 1State Key Laboratory of Rice Biology; China National Rice Research Institute; Hangzhou 310006; China; 2Institute of Genetics and Developmental Biology; Chinese Academy of Sciences; Beijing 100101; China
  • Received:1900-01-01 Revised:1900-01-01 Online:2004-09-10 Published:2004-09-10

水稻苗期发根力的QTL和上位性分析

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,*   

  1. 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

PDF

Abstract: A doubled haploid (DH) population derived from anther culture of Zhaiyeqing 8 / Jingxi 17 F1, 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 QTLMapper V1.0 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.

Key words: rice, root growth ability, quantitative trait loci, epistatic loci

摘要： 以典型籼粳交(窄叶青8号/京系17)F[sub]1[/sub]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C63-CT125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。

关键词: 水稻, 发根力, 数量性状座位, 上位性基因座