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APA citation
Patial, M., Navathe, S., He, X., Kamble, U., Kumar, M., Joshi, A. K., & Singh, P. K. (2024). Novel resistance loci for quantitative resistance to Septoria tritici blotch in Asian wheat (Triticum aestivum) via genome-wide association study. BMC Plant Biology, 24(1), 846. https://doi.org/10.1186/s12870-024-05547-x
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Background Septoria tritici blotch (STB) disease causes yield losses of up to 50 per cent in susceptible wheat cultivars and can reduce wheat production. In this study, genomic architecture for adult-plant STB resistance in a Septoria Association Mapping Panel (SAMP) having 181 accessions and genomic regions governing STB resistance in a South Asian wheat panel were looked for. Results Field experiments during the period from 2019 to 2021 revealed those certain accessions, namely BGD52 (CHIR7/ANB//CHIR1), BGD54 (CHIR7/ANB//CHIR1), IND92 (WH 1218), IND8 (DBW 168), and IND75 (PBW 800), exhibited a high level of resistance. Genetic analysis revealed the presence of 21 stable quantitative trait nucleotides (QTNs) associated with resistance to STB (Septoria tritici blotch) on all wheat chromosomes, except for 2D, 3A, 3D, 4A, 4D, 5D, 6B, 6D, and 7A. These QTNs were predominantly located in chromosome regions previously identified as associated with STB resistance. Three Quantitative Trait Loci (QTNs) were found to have significant phenotypic effects in field evaluations. These QTNs are Q.STB.5A.1, Q.STB.5B.1, and Q.STB.5B.3. Furthermore, it is possible that the QTNs located on chromosomes 1A (Q.STB.1A.1), 2A (Q.STB_DH.2A.1, Q.STB.2A.3), 2B (Q.STB.2B.4), 5A (Q.STB.5A.1, Q.STB.5A.2), and 7B (Q.STB.7B.2) could potentially be new genetic regions associated with resistance. Conclusion Our findings demonstrate the importance of Asian bread wheat as a source of STB resistance alleles and novel stable QTNs for wheat breeding programs aiming to develop long-lasting and wide-ranging resistance to Zymoseptoria tritici in wheat cultivars.
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Journal
BMC Plant Biology
Journal volume
24
Journal issue
Article number
846
Place of Publication
United Kingdom
Publisher
BioMed Central Ltd
Related Datasets
CGIAR Initiatives
Initiative
Plant Health
Accelerated Breeding
Accelerated Breeding
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Action Area
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Bill & Melinda Gates Foundation (BMGF)
Foreign, Commonwealth & Development Office (FCDO)
Foundation for Food & Agriculture Research (FFAR)
United States Agency for International Development (USAID)
CGIAR Trust Fund
Foreign, Commonwealth & Development Office (FCDO)
Foundation for Food & Agriculture Research (FFAR)
United States Agency for International Development (USAID)
CGIAR Trust Fund