作物学报2017，Vol.43Issue(1)：9-18,10.DOI:10.3724/SP.J.1006.2017.00009
小麦茎秆实心度对茎秆强度的影响及相关性状QTL分析
Influence of Stem Solidness on Stem Strength and Stem Solidness Associated QTLs in Bread Wheat
摘要
Abstract
Improving stem strength is an important way to increase lodging resistance of wheat. Solid stem traits, including thick-ness-diameter ratio of culm, stem diameter, culm wall thickness and pith diameter, are the main targets for improvement of stem strength in wheat. In the present study, an F2 population and F2:3 families derived from the cross N18 × WYSG were used to study the influence of stem solidness on stem strength and to identify QTLs for solidness related traits. The thickness-diameter ratio of culm, stem diameter, culm wall thickness and pith diameter were significantly correlated with stem strength. By using composite interval mapping (CIM), a total of 23 QTLs for the five traits were detected on chromosomes 1B, 3B, 4A, 4B, and 5A. Phenotypic variations explained by individual QTL ranged from 3.5% to 44.0%. Pleiotropic QTLs were found on chromosomes 3B (gwm547–gwm247), 4A (wmc718–wmc468), and 5A (gwm156–gwm443), all contributing very high phenotypic variations. The reliability of the markergwm247 was confirmed using 24 F7 lines derived from the N13 (hollow stem) × WYSG (solid stem) cross. The markers linked to major QTLs could be valuable in wheat breeding for lodging resistance with marker assisted selection technology.关键词
小麦/茎秆强度/实心度/QTL定位Key words
Wheat/Stem strength/Stem solidness/Quantitative trait loci引用本文复制引用
潘婷,胡文静,李东升,程晓明,吴荣林,程顺和..小麦茎秆实心度对茎秆强度的影响及相关性状QTL分析[J].作物学报,2017,43(1):9-18,10.基金项目
本研究由国家现代农业产业技术体系建设专项(CARS-03-03B, CARS-3-2-11)和江苏省农业科技自主创新资金项目[CX(13)2022]资助。@@@@This study was supported by the China Agriculture Research System (CARS-03-03B, CARS-3-2-11) and the Independent Innovation Fund for Agricultural Science and Technology in Jiangsu Province [CX(13)2022] （CARS-03-03B, CARS-3-2-11）
