Genome-Wide Association Study of Grain Number in Common Wheat From Shanxi Under Different Water Regimes

Water availability is a crucial environmental factor on grain number in wheat, which is one of the important yield-related traits. In this study, a diverse panel of 282 wheat accessions were phenotyped for grain number per spike (GNS), spikelet number (SN), basal sterile spikelet number (BSSN), and...

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Published inFrontiers in plant science Vol. 12; p. 806295
Main Authors Zheng, Xingwei, Qiao, Ling, Liu, Ye, Wei, Naicui, Zhao, Jiajia, Wu, Bangbang, Yang, Bin, Wang, Juanling, Zheng, Jun
Format Journal Article
LanguageEnglish
Published Switzerland Frontiers Media S.A 26.01.2022
Subjects
DTC
GNS
GWAS
Plant Science
Shanxi wheat
water regime
DTC
Shanxi wheat
GWAS
GNS
water regime
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Summary:Water availability is a crucial environmental factor on grain number in wheat, which is one of the important yield-related traits. In this study, a diverse panel of 282 wheat accessions were phenotyped for grain number per spike (GNS), spikelet number (SN), basal sterile spikelet number (BSSN), and apical sterile spikelet number (ASSN) under different water regimes across two growing seasons. Correlation analysis showed that GNS is significantly correlated with both SN and BSSN under two water regimes. A total of 9,793 single nucleotide polymorphism (SNP) markers from the 15 K wheat array were employed for genome-wide association study (GWAS). A total of 77 significant marker-trait associations (MTAs) for investigated traits as well as 8 MTAs for drought tolerance coefficient (DTC) were identified using the mixed linear model. Favored alleles for breeding were inferred according to their estimated effects on GNS, based on the mean difference of varieties. Frequency changes in favored alleles associated with GNS in modern varieties indicate there is still considerable genetic potential for their use as markers for genome selection of GNS in wheat breeding.
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This article was submitted to Plant Physiology, a section of the journal Frontiers in Plant Science
Reviewed by: Shuaifeng Geng, Institute of Crop Sciences, Chinese Academy of Agricultural Sciences, China; Mingming Xin, China Agricultural University, China
These authors have contributed equally to this work
Edited by: Fa Cui, Ludong University, China
ISSN:1664-462X
1664-462X
DOI:10.3389/fpls.2021.806295