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New QTLs for spot blotch disease resistance in wheat (Triticum aestivum L.) using genome-wide association mapping

Creator: Tomar, V.
Creator: Singh, D.
Creator: Dhillon, G.S.
Creator: Singh, R.P.
Creator: Poland, J.A.
Creator: Joshi, A.K.
Creator: Singh, P.K.
Creator: Bhati, P.K.
Creator: Suneel Kumar
Creator: Rahman, M.
Creator: Tiwari, B.S.
Creator: Kumar, U.
Year: 2021
Language: English
Publisher: Frontiers Media
Copyright: CIMMYT manages Intellectual Assets as International Public Goods. The user is free to download, print, store and share this work. In case you want to translate or create any other derivative work and share or distribute such translation/derivative work, please contact indicating the work you want to use and the kind of use you intend; CIMMYT will contact you with the suitable license for that purpose
Type: Article
Place of Publication: Switzerland
Volume: 11
DOI: 10.3389/fgene.2020.613217
Description: Spot blotch disease caused by Bipolaris sorokiniana is a major constraint for wheat production in tropics and subtropics. The introgression of spot blotch resistance alleles to the disease susceptible lines is critical to securing the wheat production in these regions. Although genome-wide association studies (GWASs) for spot blotch were attempted earlier, the present study focused on identifying new quantitative trait loci (QTLs) for spot blotch under natural disease pressure in diverse field conditions. A total of 139 advanced spring wheat lines were evaluated in three environments (three years and two locations) in India and Bangladesh. The GWAS using 14,063 polymorphic genotyping-by-sequencing (GBS) markers identified eight QTLs associated with spot blotch disease resistance belonging to eight chromosomes across the wheat genome. Here, we report the identified marker–trait associations (MTAs), along with the allele effects associated with the disease. The functional annotation of the significant markers identified NBS-LRR, MADS-box transcription factor, and 34 other plant-related protein families across multiple chromosomal regions. The results indicate four promising new QTLs on chromosomes 1A (497.2 Mb), 1D (89.84 Mb), 2B (421.92 Mb), and 6D (6.84 Mb) associated with several disease resistance protein families. These results provide insights into new genomic regions associated with spot blotch disease, and with additional validation, could be utilized in disease resistance breeding efforts in wheat development.
Agrovoc: GENOMES
Agrovoc: SPOTS
Agrovoc: WHEAT
Related Datasets:
ISSN: 1664-8021
Journal: Frontiers in Genetics
Article number: 613217

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  • Wheat
    Wheat - breeding, phytopathology, physiology, quality, biotech

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