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- Title
Genome-wide association study of grain shapes in Aegilops tauschii.
- Authors
Zhao, Xinpeng; Lv, Linlin; Li, Jiahui; Ma, Feifei; Bai, Shenglong; Zhou, Yun; Zhang, Dale; Li, Suoping; Song, Chun-peng
- Abstract
As the diploid progenitor of the D genome of common wheat, Aegilops tauschii contains abundant genetic resources for potential economic traits, including yield, biotic and abiotic stress tolerance. In this study, phenotypic variation for 4 grain shapes in 221 Ae. tauschii accessions was evaluated in 5 environments for 2 consecutive crop seasons, and best linear unbiased estimates (BLUEs) for grain shapes were calculated across the seasons. To decrease false discovery rate, a total of 139 loci were only identified based on the BLUEs and each environment by genome-wide association study utilizing 4282 single nucleotide polymorphism (SNP) markers from D genome of wheat 55 K genotyping assay. These loci could explain 5.86–17.71% of the phenotypic variation of grain length (GL), 6.83–8.42% of grain width, 5.99–17.71% of grain perimeter, and 5.80–19.61% of grain length–width ratio (GLWR), respectively. Further, 26 significant loci were validated in the wheat mini-core collections population by two-tailed t test. Moreover, the physical positions of some loci for GL and GLWR were found to correspond with previously mapped loci that affect these traits. Based on the obtained SNP loci, 6 putative candidate genes related to grain shapes were identified. This study could provide valuable information for cloning genes related to grain shapes in Ae. tauschii.
- Publication
Euphytica, 2021, Vol 217, Issue 7, p1
- ISSN
0014-2336
- Publication type
Article
- DOI
10.1007/s10681-021-02877-x