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Genome‑wide association mapping for adult resistance to powdery mildew in common wheat

Citation

Kang, Y and Barry, K and Cao, F and Zhou, M, Genome‑wide association mapping for adult resistance to powdery mildew in common wheat, Molecular Biology Reports, 47 pp. 1241-1256. ISSN 0301-4851 (2020) [Refereed Article]

Copyright Statement

Springer Nature B.V. 2019

DOI: doi:10.1007/s11033-019-05225-4

Abstract

Blumeria graminis f. sp. tritici, the causal agent of wheat powdery mildew disease, can occur at all stages of the crop and constantly threatens wheat production. To identify candidate resistance genes for powdery mildew, we performed GWAS (genome-wide association studies) on a total set of 329 wheat varieties obtained from different origins. These wheat materials were genotyped using wheat 90K SNP array and evaluated for their resistance in either field or glasshouse condition from 2016 to 2018. Using a mixed linear model, 33 SNP markers of which 14 QTL (quantitative trait loci) were later defined were observed to associate with powdery mildew resistance. Among these, QTL on chromosome 3A, 3B, 6D and 7D were concluded as potentially new QTL. Exploration of candidate genes for new QTL suggested roles of these genes involved in encoding disease resistance and defence-related proteins, and regulating early immune response to the pathogen. Overall, the results reveal that GWAS can be an effective means of identifying marker-trait associations, though further functional validation and fine-mapping of gene candidates are required before creating opportunities for developing new resistant genotypes.

Item Details

Item Type:Refereed Article
Keywords:wheat, powdery mildew, marker-trait association, single nucleotide polymorphism, quantitative trait loci
Research Division:Agricultural and Veterinary Sciences
Research Group:Crop and Pasture Production
Research Field:Agro-ecosystem Function and Prediction
Objective Division:Plant Production and Plant Primary Products
Objective Group:Winter Grains and Oilseeds
Objective Field:Barley
UTAS Author:Kang, Y (Ms Yichen Kang)
UTAS Author:Barry, K (Associate Professor Karen Barry)
UTAS Author:Zhou, M (Professor Meixue Zhou)
ID Code:136240
Year Published:2020 (online first 2019)
Deposited By:TIA - Research Institute
Deposited On:2019-12-09
Last Modified:2020-08-21
Downloads:0

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