Dissection of a novel major stable QTL on chromosome 7D for grain hardness and its breeding value estimation in bread wheat
文献类型： 外文期刊
作者： Liu, Xiaofeng 1 ; Xu, Zhibin 1 ; Feng, Bo 1 ; Zhou, Qiang 1 ; Guo, Shaodan 1 ; Liao, Simin 1 ; Ou, Yuhao 1 ; Fan, Xiaoli 1 ; Wang, Tao 1 ;
作者机构： 1.Chengdu Inst Biol, Chinese Acad Sci, Chengdu, Peoples R China
2.Sichuan Acad Agr Sci, Insitute Plant Protect, Chengdu, Peoples R China
3.Univ Chinese Acad Sci, Beijing, Peoples R China
4.Innovat Acad Seed Design, Chinese Acad Sci, Beijing, Peoples R China
关键词： grain hardness; quality-related traits; QTL mapping; BSE-Seq; Puroindoline
期刊名称：FRONTIERS IN PLANT SCIENCE （ 影响因子：5.6； 五年影响因子：6.8 ）
ISSN： 1664-462X
年卷期： 2024 年 15 卷
页码：
收录情况： SCI
摘要： Grain hardness (Gh) is important for wheat processing and end-product quality. Puroindolines polymorphism explains over 60% of Gh variation and the novel genetic factors remain to be exploited. In this study, a total of 153 quantitative trait loci (QTLs), clustered into 12 genomic intervals (C1-C12), for 13 quality-related traits were identified using a recombinant inbred line population derived from the cross of Zhongkemai138 (ZKM138) and Chuanmai44 (CM44). Among them, C7 (harboring eight QTLs for different quality-related traits) and C8 (mainly harboring QGh.cib-5D.1 for Gh) were attributed to the famous genes, Rht-D1 and Pina, respectively, indicating that the correlation of involved traits was supported by the pleotropic or linked genes. Notably, a novel major stable QTL for Gh was detected in the C12, QGh.cib-7D, with ZKM138-derived allele increasing grain hardness, which was simultaneously mapped by the BSE-Seq method. The geographic pattern and transmissibility of this locus revealed that the increasing-Gh allele is highly frequently present in 85.79% of 373 worldwide wheat varieties and presented 99.31% transmissibility in 144 ZKM138-derivatives, indicating the non-negative effect on yield performance and that its indirect passive selection has happened during the actual breeding process. Thus, the contribution of this new Gh-related locus was highlighted in consideration of improving the efficiency and accuracy of the soft/hard material selection in the molecular marker-assisted process. Further, TraesCS7D02G099400, TraesCS7D02G098000, and TraesCS7D02G099500 were initially deduced to be the most potential candidate genes of QGh.cib-7D. Collectively, this study provided valuable information of elucidating the genetic architecture of Gh for wheat quality improvement.
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