作物学报2017，Vol.43Issue(4)：496-500,5.DOI:10.3724/SP.J.1006.2017.00496
利用普通六倍体小麦和西藏半野生小麦杂交衍生的重组自交系定位小麦芒长QTL
Mapping QTLs for Awn Length in Recombinant Inbred Line Population De-rived from the Cross between Common Wheat and Tibetan Semi-wild Wheat
摘要
Abstract
Awn length is an important agronomic trait in hexaploid wheat and controlled by multiple genes. A recombinant inbred line (RIL) population containing 186 lines were developed by crossing Tibetan semi-wild wheat accession Q1028 (female) and common wheat variety Zhengmai 9023, and a genome-wide genetic map (2597 cM) was constructed using SSR and DArT mark-ers. QTLs controlling awn length were identified with two-year phenotypic data and the genetic map by using the Inclusive Com-posite Interval Mapping (ICIM) method. Two QTLs associated with awn length, designatedQwa.sau-4AS and Qwa.sau-5AL, were detected on chromosomes 4A and 5A, which explained 7.4% and 27.3% of phenotypic variations, respectively. According to ge-netic locations, effects of the two QTLs might be fromHdandB1genes that could reduce awn length, respectively. Genetic analysis showed thatQwa.sau-4ASand Qwa.sau-5ALhad cumulative effects, with stronger inhibiting effect in Qwa.sau-5AL than inQwa.sau-4AS. These results are valuable for fine mapping and cloning target genes controlling awn length in the future.关键词
普通小麦/芒长/QTL/SSR标记/DArT标记Key words
Commonwheat/Awn length/QTL/SSR marker/DArT marker引用本文复制引用
宫希,兰秀锦,蒋云峰,徐彬杰,乔媛媛,华诗雨,吴旺,马建,周小鸿,祁鹏飞..利用普通六倍体小麦和西藏半野生小麦杂交衍生的重组自交系定位小麦芒长QTL[J].作物学报,2017,43(4):496-500,5.基金项目
本研究由国家自然科学基金项目(31570335)资助. This study was supported by the National Natural Science Foundation of China (31570335). （31570335）
