作物学报2012，Vol.38Issue(7)：1240-1246,7.DOI:10.3724/SP.J.1006.2012.01240
利用RIL群体对水稻再生力及相关农艺性状的QTL分析
QTL Analysis of Rice Ratooning Ability and Related Agronomic Traits by Using RIL Populations
摘要
Abstract
A molecular linkage map containing 105 SSR marks were constructed by using a RIL population generated from the F7 descent of a cross of japonica glutinous rice variety 89-1 and an indica heavy panicle backbone hybrid rice lines SH527. By using this map, we mapped 15 QTLs for seven agronomic traits in the normal season, which was distributed on chromosomes 1, 2, 3, 5, 6, 7, and 10, respectively. The LOD value varied from 2.10 to 7.51, and the contribution rate varied from 3.77% to 25.37%, among which seven QTLs had the contribution rate larger than 10.0%. The number of a single trait QTL varied from 1 to 5. Two QTLs (qRA4, qRA5) affecting rice ratooning ability were detected on chromosomes 4 and 5, the contribution rate was 8.17% and 7.09%, and the additive effect was 0.32 and -0.39, respectively. Thirty-six QTLs for agronomic trails were detected in two seasons and among which eight were detected repeatablely. According to the results, the ratooning ability was remarkably negatively related to the effective ear of the normal season. In addition, the ratooning ability was tightly positively related to the effective ear in the ratooning season, and was negatively related to the grain number per ear and seed density. The QTLs mapping results revealed that the effective ear of normal season and ratooning season is the main factor that affects rice's ratooning ability.关键词
水稻/重组自交系/再生力/农艺性状/QTLKey words
Rice/ RIL/ Ratooning ability/ Agronomic trait/ QTL引用本文复制引用
杨川航,王玉平,涂斌,李婷,胡亮,李仕贵..利用RIL群体对水稻再生力及相关农艺性状的QTL分析[J].作物学报,2012,38(7):1240-1246,7.基金项目
本研究由国家杰出科学基金项目(31025017)和四川省自贡市科委重大专项(2008NO4)资助. （31025017）
