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Genome-wide Association Study for Starch Pasting Properties in Chinese Spring Wheat

文献类型： 外文期刊

作者： Tian, Yousheng 1 ; Sang, Wei 3 ; Liu, Pengpeng 3 ; Liu, Jindong 4 ; Xiang, Jishan 3 ; Cui, Fengjuan 3 ; Xu, Hongjun 3 ; Han, Xinnian 3 ; Nie, Yingbin 3 ; Kong, Dezhen 3 ; Li, Weihua 1 ; Mu, Peiyuan 3 ;

作者机构： 1.Shihezi Univ, Coll Agr, Key Lab Oasis Ecol Agr, Shihezi, Peoples R China

2.Xinjiang Acad Agrireclamat Sci, Dept Adm Management, Shihezi, Peoples R China

3.Xinjiang Acad Agrireclamat Sci, Inst Crop Sci, Key Lab Xinjiang Prod & Construction Corps Cereal, Shihezi, Peoples R China

4.Chinese Acad Agr Sci, Inst Crop Sci, Beijing, Peoples R China

关键词： candidate genes; GWAS; haplotype analysis; RVA parameters; Triticum aestivum

期刊名称：FRONTIERS IN GENETICS （ 影响因子：4.772； 五年影响因子：4.933 ）

ISSN：

年卷期： 2022 年 13 卷

页码：

收录情况： SCI

摘要： In order to understand the genetic basis of starch pasting viscosity characteristics of Chinese spring wheat, we assessed the genetic variation of RVA parameters determined by the Rapid Visco Analyser in a panel of 192 Chinese spring wheat accessions grown in Er'shi, Shihezi and Zhaosu during 2012 and 2013 cropping seasons. A genome-wide association study with 47,362 single nucleotide polymorphism (SNP) markers was conducted to detect marker-trait associations using mixed linear model. Phenotypic variations of RVA parameters ranged from 1.6 to 30.7% and broad-sense heritabilities ranged from 0.62 to 0.91. Forty-one SNP markers at 25 loci were significantly associated with seven RVA traits in at least two environments; among these, 20 SNPs were located in coding sequences (CDS) of 18 annotation genes, which can lead to discovering novel genes underpinning starch gelatinization in spring wheat. Haplotype analysis revealed one block for breakdown (BD) on chromosome 3B and two blocks for pasting temperature (T) on chromosome 7B. Cultivars with superior haplotypes at these loci showed better starch pasting viscosity than the average of all cultivars surveyed. The identified loci and associated markers provide valuable sources for future functional characterization and genetic improvement of starch quality in wheat.

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