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Identification and validation of novel loci associated with wheat quality through a genome-wide association study

文献类型： 外文期刊

作者： Pu, Zhi-en 1 ; Ye, Xue-ling 3 ; Li, Yang 1 ; Shi, Bing-xin 1 ; Guo, Zhu 1 ; Dai, Shou-fen 2 ; Ma, Jian 2 ; Liu, Ze-hou 4 ; Jiang, Yun-feng 2 ; Li, Wei 1 ; Jiang, Qian-tao 2 ; Chen, Guo-yue 2 ; Wei, Yu-ming 2 ; Zheng, You-liang 2 ;

作者机构： 1.Sichuan Agr Univ, Coll Agron, Chengdu 611130, Peoples R China

2.Sichuan Agr Univ, Triticeae Res Inst, Yaan 611130, Peoples R China

3.Chengdu Univ, Coll Food & Biol Engn, Key Lab Coarse Cereal Proc, Minist Agr & Rural Affairs, Chengdu 610106, Peoples R China

4.Sichuan Acad Agr Sci, Crop Res Inst, Chengdu 610066, Peoples R China

关键词： cultivars; landraces; grain protein concentration (GPC); grain starch concentration (GSC); wet gluten concentration (WGC); 55K SNP; validation

期刊名称：JOURNAL OF INTEGRATIVE AGRICULTURE （ 影响因子：4.384； 五年影响因子：4.021 ）

ISSN： 2095-3119

年卷期： 2022 年 21 卷 11 期

页码：

收录情况： SCI

摘要： Understanding the genetic basis of quality-related traits contributes to the improvement of grain protein concentration (GPC), grain starch concentration (GSC), and wet gluten concentration (WGC) in wheat. In this study, a genome-wide association study (GWAS) based on a mixed linear model (MLM) was performed on 236 wheat accessions, including 160 cultivars and 76 landraces, using a 55K single nucleotide polymorphism (SNP) array in multiple environments. A total of 12 stable QTL/SNPs that control different quality traits in this populations in at least two environments under stripe rust stress were identified. Among these 12, three, seven and two QTLs associated with GPC, GSC and WGC were characterized, respectively, and they were located on chromosomes (chr) 1B, 1D, 2A, 2B, 2D, 3B, 3D, 5D, and 7D with the phenotypic variation explained (PVE) ranging from 4.2 to 10.7%. Compared with the previously reported QTLs/ genes, five QTLs (QGsc.sicau-1BL, QGsc.sicau-1DS, QGsc.sicau-2DL.1, QGsc.sicau-2DL.2, and QWgc.sicau-5DL) were potentially novel. KASP markers for the SNPs AX-108770574 and AX-108791420 on chr5D associated with wet gluten concentration were successfully developed. The phenotypes of the cultivars containing the A-allele in AX-108770574 and the T-allele in AX-108791420 were extremely significantly (P<0.01) higher than those of the landraces containing the G-or C-allele with respect to the wet gluten concentration in each of the environments. The KASP markers developed and validated in this study could be utilized in molecular breeding aimed at improving the quality of wheat.

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