Genome-wide association study of six quality-related traits in common wheat ( Triticum aestivum L.) under two sowing con
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ORIGINAL ARTICLE
Genome‑wide association study of six quality‑related traits in common wheat (Triticum aestivum L.) under two sowing conditions Hongyao Lou1 · Runqi Zhang1 · Yitong Liu3,4 · Dandan Guo1 · Shanshan Zhai1 · Aiyan Chen1 · Yufeng Zhang1 · Chaojie Xie1 · Mingshan You1 · Huiru Peng1 · Rongqi Liang1 · Zhongfu Ni1,2 · Qixin Sun1,2 · Baoyun Li1 Received: 17 May 2020 / Accepted: 8 October 2020 © Springer-Verlag GmbH Germany, part of Springer Nature 2020
Abstract Key message We identified genomic regions associated with six quality-related traits in wheat under two sowing conditions and analyzed the effects of multienvironment-significant SNPs on the stability of these traits. Abstract Grain quality affects the nutritional and commercial value of wheat (Triticum aestivum L.) and is a critical factor influencing consumer preferences for specific wheat varieties. Climate change is predicted to increase environmental stress and thereby reduce wheat quality. Here, we performed a genotyping assay involving the use of the wheat 90 K array in a genome-wide association study of six quality-related traits in 486 wheat accessions under two sowing conditions (normal and late sowing) over 4 years. We identified 64 stable quantitative trait loci (QTL), including 10 for grain protein content, 9 for wet gluten content, 4 for grain starch content, 14 for water absorption, 15 for dough stability time and 12 for grain hardness in wheat under two sowing conditions. These QTL harbored 175 single nucleotide polymorphisms (SNPs), explaining approximately 3–13% of the phenotypic variation in multiple environments. Some QTL on chromosomes 6A and 5D were associated with multiple traits simultaneously, and two (QNGPC.cau-6A, QNGH.cau-5D) harbored known genes, such as NAM-A1 for grain protein content and Pinb for grain hardness, whereas other QTL could facilitate gene discovery. Forty-three SNPs that were detected under late or both normal and late sowing conditions appear to be related to phenotypic stability. The effects of these SNP alleles were confirmed in the association population. The results of this study will be useful for further dissecting the genetic basis of quality-related traits in wheat and developing new wheat cultivars with desirable alleles to improve the stability of grain quality.
Introduction Communicated by Ian Mackay. Electronic supplementary material The online version of this article (https://doi.org/10.1007/s00122-020-03704-y) contains supplementary material, which is available to authorized users. * Baoyun Li [email protected] 1
State Key Laboratory for Agrobiotechnology/Key Laboratory of Crop Heterosis and Utilization, the Ministry of Education/Key Laboratory of Crop Genetic Improvement, Beijing Municipality/China Agricultural University, Beijing 100193, China
2
National Plant Gene Research Centre, Beijing 100193, China
3
Key Laboratory of Photobiology, Institute of Botany, Chinese Academy of Sciences, Nanxincun 20, Xiangshan, Beijing 100093, China
4
University of the Chinese Academ
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