Genome-Wide Association Study for Grain Micronutrient Concentrations in Wheat Advanced Lines Derived From Wild Emmer

• DOI: 10.3389/fpls.2021.651283
• Publication Date: 2021-05-14T06:55:40Z
• Authors: Jia Liu; Lin Huang; Tingxuan Li; Yaxi Liu; Zehong Yan; Guan Tang; Youliang Zheng; Dengcai Liu; Bihua Wu
• Keywords: Biofortification; Germ plasm; Genome-wide Association Study; Plant Breeding

Wheat is one of the important staple crops as resources both food and micronutrient for most people world. However, levels micronutrients (especially Fe Zn) in common wheat are inherently low. Biofortification an effective way to increase concentration wheat. Wild emmer ( Triticum turgidum ssp. dicoccoides , AABB, 2n = 4x 28) germplasm resource improvement. In present study, a genome-wide association study (GWAS) was performed characterize grain iron, zinc, manganese (GFeC, GZnC, GMnC) 161 advanced lines derived from wild emmer. Using general linear model mixed model, we identified 14 high-confidence significant marker-trait associations (MTAs) that were associated with GFeC, GMnC which nine MTAs novel. Six distributed on chromosomes 3B, 4A, 4B, 5A, 7B significantly GFeC. Three 1A 2A GZnC five 1B GMnC. These show no negative effects thousand kernel weight (TKW), implying potential value simultaneous improvement concentrations TKW breeding. Meanwhile, positively correlated, suggesting these traits could be simultaneously improved. Genotypes containing 61 top genotypes higher recommended biofortification A total 38 candidate genes related identified. candidates can classified into four main groups: enzymes, transporter proteins, MYB transcription factor, plant defense responses proteins. The provide essential information breeding through marker-assisted selection (MAS).