水稻高节位分蘖的QTL定位和互作分析  

QTL Mapping and Epistatic Analysis of High-Order Tillering in Rice(Oryza sativa)

作　　者：姜华[1] 赵江红[2] 郭龙彪[3] 姜亮[3] 薛大伟[4] 曾大力[3] 钱前[3] 孙国昌[1] 

机构地区：[1]浙江省农业科学院植物保护与微生物研究所,浙江杭州310021 [2]浙江大学985农业生物与环境科技创新平台,浙江杭州310029 [3]中国水稻研究所水稻生物学国家重点实验室,浙江杭州310006 [4]杭州师范大学生命与环境科学学院,浙江杭州310036

出　　处：《中国水稻科学》2011年第2期157-162,共6页Chinese Journal of Rice Science

基　　金：国家科技支撑计划资助项目(2006BAD13B01);国家863计划资助项目(2006AA10A102);浙江省自然科学基金资助项目(R306302)

摘　　要：高节位分蘖是水稻生产中常见的现象,同时高节位分蘖与水稻的驯化也存在密切的联系。利用来源于窄叶青8号与京系17及春江06与台中本地1号的两个加倍单倍体(DH)群体(分别简称为ZJDH群体和TCDH群体)为材料,对水稻高节位分蘖的遗传特征进行了研究。采用复合区间作图法,在ZJDH群体中共定位到qHOT3、qHOT6-1和qHOT8等3个QTL,分别位于第3、6和8染色体上;对TCDH群体的QTL定位共检测到相关位点2个,分别位于第6和12染色体上。同时,在两个群体中分别检测到4对和7对上位性互作位点。QTL比较分析表明在两个群体中分别定位到的第6染色体上的QTL所在区间可能一致,说明水稻第6染色体对高节位分蘖具有重要的影响。High-order tillering（HOT） is a common phenomenon in rice production,which is an important syndrome of rice domestication.Two different doubled haploid populations,one derived from a cross between Jingxi 17 and Zhaiyeqing 8 and the other from a cross between Chunjiang 06 and TN1（herein designated as ZJDH and TCDH,respectively） were used to study genetic characteristics of high-order tillering.By using composite interval mapping,three QTLs（qHOT3,qHOT6-1 and qHOT8） located on chromosomes 3,6 and 8 in ZJDH population,and two QTLs on chromosomes 6 and 12 in TCDH population,respectively were detected.Meanwhile,four and seven pairs of epistatic loci affecting HOT were mapped in ZJDH and TCDH,respectively.Furthermore,comparative analysis of two QTLs qHOT6-1 and qHOT6-2,which were located on chromosome 6 in the two populations,respectively indicated that the related quantitative trait loci may be identical to each other.And chromosome 6 may play an important role in high-order tillering.

关 键 词：水稻 高节位分蘖 加倍单倍体群体 数量性状基因座 

分 类 号：S511[农业科学—作物学]