Journal article
A genome-wide association study reveals a rich genetic architecture of flour color-related traits in bread wheat
Frontiers in Plant Science, Vol.9, Article 1136
2018
Abstract
Flour color-related traits, including brightness (L*), redness (a*), yellowness (b*) and yellow pigment content (YPC), are very important for end-use quality of wheat. Uncovering the genetic architecture of these traits is necessary for improving wheat quality by marker-assisted selection (MAS). In the present study, a genome-wide association study (GWAS) was performed on a collection of 166 bread wheat cultivars to better understand the genetic architecture of flour color-related traits using the wheat 90 and 660 K SNP arrays, and 10 allele-specific markers for known genes influencing these traits. Fifteen, 28, 25, and 32 marker–trait associations (MTAs) for L*, a*, b*, and YPC, respectively, were detected, explaining 6.5–20.9% phenotypic variation. Seventy-eight loci were consistent across all four environments. Compared with previous studies, Psy-A1, Psy-B1, Pinb-D1, and the 1B•1R translocation controlling flour color-related traits were confirmed, and four loci were novel. Two and 11 loci explained much more phenotypic variation of a* and YPC than phytoene synthase 1 gene (Psy1), respectively. Sixteen candidate genes were predicted based on biochemical information and bioinformatics analyses, mainly related to carotenoid biosynthesis and degradation, terpenoid backbone biosynthesis and glycolysis/gluconeogenesis. The results largely enrich our knowledge of the genetic basis of flour color-related traits in bread wheat and provide valuable markers for wheat quality improvement. The study also indicated that GWAS was a powerful strategy for dissecting flour color-related traits and identifying candidate genes based on diverse genotypes and high-throughput SNP arrays.
Details
- Title
- A genome-wide association study reveals a rich genetic architecture of flour color-related traits in bread wheat
- Authors/Creators
- S. Zhai (Author/Creator)J. Liu (Author/Creator) - Institute of Crop SciencesD. Xu (Author/Creator) - Institute of Crop SciencesW. Wen (Author/Creator) - Institute of Crop SciencesJ. Yan (Author/Creator) - Institute of Crop SciencesP. Zhang (Author/Creator) - Anhui Academy of Agricultural SciencesY. Wan (Author/Creator) - Anhui Academy of Agricultural SciencesS. Cao (Author/Creator) - Institute of Crop SciencesY. Hao (Author/Creator) - Institute of Crop SciencesX. Xia (Author/Creator) - Institute of Crop SciencesW. Ma (Author/Creator) - Australian Export Grains Innovation CentreZ. He (Author/Creator) - International Maize and Wheat Improvement Center
- Publication Details
- Frontiers in Plant Science, Vol.9, Article 1136
- Publisher
- Frontiers
- Identifiers
- 991005545342207891
- Copyright
- © 2018 Zhai, Liu, Xu, Wen, Yan, Zhang, Wan, Cao, Hao, Xia, Ma and He.
- Murdoch Affiliation
- School of Veterinary and Life Sciences
- Language
- English
- Resource Type
- Journal article
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- Collaboration types
- Domestic collaboration
- International collaboration
- Citation topics
- 3 Agriculture, Environment & Ecology
- 3.4 Crop Science
- 3.4.96 QTL
- Web Of Science research areas
- Plant Sciences
- ESI research areas
- Plant & Animal Science