水稻孕穗期耐冷性QTLs分析  

Identification of QTLs for Cold Tolerance at the Booting Stage in Rice

作　　者：韩龙植[1] 乔永利[1,2] 张媛媛 曹桂兰[1] 芮钟斗[3] 高熙宗 

机构地区：[1]中国农业科学院作物品种资源研究所 [2]西北农林科技大学农学院,陕西杨凌712100 [3]韩国农村振兴厅作物科学院 [4]汉城大学校农业生命科学大学农学科

出　　处：《作物学报》2005年第5期653-657,共5页Acta Agronomica Sinica

基　　金：国家自然科学基金项目 (3 0 0 70 42 1) ;国家"十五"科技攻关计划项目 (2 0 0 1BA5 11B0 2 ) ;中韩合作项目 (2 0 0 0 -2 0 0 4)。

摘　　要：本研究以籼粳交“密阳2 3 吉冷1号”的F2∶3代2 0 0个家系为作图群体,在韩国春川进行冷水胁迫下水稻耐冷性鉴定,并以利用SSR标记构建的分子连锁图谱为基础,对水稻孕穗期耐冷性及其相对耐冷性进行数量性状位点(QTLs)分析。结果表明,在第1、2、4、11和12染色体上检测到与孕穗期耐冷性相关的QTL各1个,对表型变异的解释率为5 .6 %～8 2 % ;在第1、3、4和11染色体上检测到与孕穗期相对耐冷性相关的QTL各1个,对表型变异的解释率为5 .9%～10 3%。所检测到的耐冷性QTL的增效等位基因多数来自吉冷1号,基因作用的方式主要为部分显性、显性和超显性。The quantitative trait loci (QTLs) for cold tolerance and relative cold tolerance at the booting stage were identifi ed base d on genetic map of microsatellite markers using F 2∶3 population includin g 200 lines derived from a cross between indica and japonica Milyang 23/ Jileng 1. The cold tolerance at the booting stage were evaluated in Chuncheon of Korea. The QTLs related to cold tolerance at the booting stage were detected on chromosome 1, 2, 4, 11 and 12, respectively, which explained 5.6%-8.2% of the observed phenotypic variance. The QTLs related to relative cold tolerance at the booting stage were detected on chromosome 1, 3, 4 and 11, respectively, which explained 5.9%-10.3% of the observed phenotypic variance. Most of dete cted QTLs allele were come from cold-tolerant parent Jileng 1. The gene action was partial dominance, dominance and over dominance primarily.

关 键 词：水稻 冷水胁迫 孕穗期耐冷性 微卫星标记 数量性状位点 

分 类 号：S511[农业科学—作物学]