作物学报2025，Vol.51Issue(8)：2077-2086,10.DOI:10.3724/SP.J.1006.2025.51010
矮秆基因Rht-D1在长江中下游麦区的育种利用探索
Exploring the breeding utilization of the dwarfing gene Rht-D1 in wheat in the middle and lower reaches of the Yangtze River
摘要
Abstract
Rht-B1 and Rht-D1 are the most widely utilized dwarfing genes in wheat breeding worldwide.In the long-term breed-ing practices of the middle and lower reaches of the Yangtze River in China,there has been a clear preference for dwarfing genes,with Rht-B1b being the predominant allele.To diversify dwarfing gene types and broaden the genetic base of local wheat varieties,this study aimed to introduce the major dwarfing allele Rht-D1b—commonly used in the Huang-huai wheat region—into the mid-dle and lower reaches of the Yangtze River.Parental lines from both regions were used for hybridization,and progeny carrying different dwarfing genes were selected.Field-based phenotypic evaluations were then conducted to provide theoretical and germ-plasm support for future breeding efforts.The results showed no significant differences between Rht-D1b and Rht-B1b lines in traits such as spike number per unit area,plant height,spike length,flag leaf length and width,or angles between leaf and stem.However,the lines carrying Rht-D1b exhibited a significantly higher number of spikelets,a favorable trait with potential to en-hance yield.On the other hand,Rht-D1b lines showed a markedly higher incidence of Fusarium head blight(FHB)infection compared to Rht-B1b lines.Importantly,the incorporation of FHB resistance genes substantially improved FHB resistance in lines with both dwarfing gene types.This study demonstrates that the introduction of Rht-D1b into wheat breeding programs in the middle and lower reaches of the Yangtze River can effectively increase spikelet number and yield potential.Furthermore,the in-tegration of FHB resistance genes can mitigate associated disease susceptibility.These newly developed lines also have potential as resistant parental materials for use in the Huang-Huai wheat breeding programs.关键词
小麦/长江中下游麦区/矮秆基因/冬春杂交/赤霉病Key words
wheat/the middle and lower reaches of the Yangtze River/dwarfing genes/winter-spring hybridization/Fusarium head blight引用本文复制引用
姜朋,吴磊,黄倩楠,李畅,王化敦,何漪,张鹏,张旭..矮秆基因Rht-D1在长江中下游麦区的育种利用探索[J].作物学报,2025,51(8):2077-2086,10.基金项目
本研究由国家自然科学基金项目(32372186),生物育种钟山实验室项目(ZSBBL-KY2023-02),江苏省国际科技合作项目(BZ2024043)和财政部和农业农村部国家现代农业产业技术体系建设专项(CARS-03-57)资助.This study was supported by the National Natural Science Foundation of China(32372186),Zhongshan Biological Breeding Laboratory(ZSBBL-KY2023-02),International Scientific and Technological Cooperation Projects of Jiangsu Province(BZ2024043),and the China Agriculture Research System of MOF and MARA(CARS-03-57). （32372186）
