Zhao Jie, Sun Lijing, Hu Mengyun, Liu Qian, Xu Junjie, Mu Liming, Wang Jianbing, Yang Jing, Wang Peinan, Li Qianying, Li Hui, Zhang Yingjun
Hebei Key Laboratory of Crop Genetics and Breeding, Institute of Cereal and Oil Crops, Hebei Academy of Agriculture and Forestry Sciences, Shijiazhuang 050035, China.
Dingxi Academy of Agricultural Sciences, Dingxi 743000, China.
Plants (Basel). 2024 Sep 10;13(18):2545. doi: 10.3390/plants13182545.
To investigate the genetic basis of processing quality- and yield-related traits in bread wheat ( L., AABBDD), a systematic analysis of wheat processing quality- and yield-related traits based on genome-wide association studies (GWASs) of 285 regional test lines of wheat from Hebei province, China, was conducted. A total of 87 quantitative trait loci (QTL), including twenty-one for water absorption (WA), four for wet gluten content, eight for grain protein content, seventeen for dough stability time (DST), thirteen for extension area (EA), twelve for maximum resistance (MR), five for thousand-grain weight (TGW), one for grain length, and six for grain width were identified. These QTL harbored 188 significant single-nucleotide polymorphisms (SNPs). Twenty-five SNPs were simultaneously associated with multiple traits. Notably, the SNP on chromosome 1A was associated with DST, EA, and MR. SNPs and on chromosome 5D were associated with wheat WA and TGW. Most processing quality-related QTL and seven grain yield-related QTL identified in this study were newly discovered. Among the surveyed accessions, 18 rare superior alleles were identified. This study identified significant QTL associated with quality-related and yield-related traits in wheat, and some of them showed pleiotropic effects. This study will facilitate molecular designs that seek to achieve synergistic improvements of wheat quality and yield.
为研究面包小麦（L.，AABBDD）加工品质和产量相关性状的遗传基础，基于对来自中国河北省的285个小麦区域试验品系进行全基因组关联研究（GWAS），对小麦加工品质和产量相关性状进行了系统分析。共鉴定出87个数量性状位点（QTL），包括21个与吸水率（WA）相关的位点、4个与湿面筋含量相关的位点、8个与籽粒蛋白质含量相关的位点、17个与面团稳定时间（DST）相关的位点、13个与延伸面积（EA）相关的位点、12个与最大抗延阻力（MR）相关的位点、5个与千粒重（TGW）相关的位点、1个与籽粒长度相关的位点以及6个与籽粒宽度相关的位点。这些QTL包含188个显著的单核苷酸多态性（SNP）。25个SNP同时与多个性状相关。值得注意的是，1A染色体上的SNP与DST、EA和MR相关。5D染色体上的SNP和与小麦WA和TGW相关。本研究中鉴定出的大多数加工品质相关QTL和7个籽粒产量相关QTL是新发现的。在调查的种质资源中，鉴定出18个罕见的优良等位基因。本研究鉴定出了与小麦品质相关和产量相关性状的显著QTL，其中一些表现出多效性。本研究将有助于旨在实现小麦品质和产量协同改良的分子设计。
