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New Genotypes and Genomic Regions for Resistance to Wheat Blast in South Asian Germplasm

Roy, Chandan and Juliana, Philomin and Kabir, Muhammad R. and Roy, Krishna K. and Gahtyari, Navin C. and Marza, Felix and He, Xinyao and Singh, Gyanendra P. and Chawade, Aakash and Joshi, Arun K. and Singh, Pawan K. (2021). New Genotypes and Genomic Regions for Resistance to Wheat Blast in South Asian Germplasm. Plants. 10 , 2693
[Research article]

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Abstract

Wheat blast (WB) disease, since its first identification in Bangladesh in 2016, is now an established serious threat to wheat production in South Asia. There is a need for sound knowledge about resistance sources and associated genomic regions to assist breeding programs. Hence, a panel of genotypes from India and Bangladesh was evaluated for wheat blast resistance and a genome-wide association study (GWAS) was performed. Disease evaluation was done during five crop seasons-at precision phenotyping platform (PPPs) for wheat blast disease at Jashore (2018-19), Quirusillas (2018-19 and 2019-20) and Okinawa (2019 and 2020). Single nucleotide polymorphisms (SNP) across the genome were obtained using DArTseq genotyping-by-sequencing platform, and in total 5713 filtered markers were used. GWAS revealed 40 significant markers associated with WB resistance, of which 33 (82.5%) were in the 2NS/2AS chromosome segment and one each on seven chromosomes (3B, 3D, 4A, 5A, 5D, 6A and 6B). The 2NS markers contributed significantly in most of the environments, explaining an average of 33.4% of the phenotypic variation. Overall, 22.4% of the germplasm carried 2NS/2AS segment. So far, 2NS translocation is the only effective WB resistance source being used in the breeding programs of South Asia. Nevertheless, the identification of non-2NS/2AS genomic regions for WB resistance provides a hope to broaden and diversify resistance for this disease in years to come.

Authors/Creators:Roy, Chandan and Juliana, Philomin and Kabir, Muhammad R. and Roy, Krishna K. and Gahtyari, Navin C. and Marza, Felix and He, Xinyao and Singh, Gyanendra P. and Chawade, Aakash and Joshi, Arun K. and Singh, Pawan K.
Title:New Genotypes and Genomic Regions for Resistance to Wheat Blast in South Asian Germplasm
Series Name/Journal:Plants
Year of publishing :2021
Volume:10
Article number:2693
Number of Pages:12
Publisher:MDPI
Language:English
Publication Type:Research article
Article category:Scientific peer reviewed
Version:Published version
Copyright:Creative Commons: Attribution 4.0
Full Text Status:Public
Subjects:(A) Swedish standard research categories 2011 > 4 Agricultural Sciences > 404 Agricultural Biotechnology > Genetics and Breeding
Keywords:GWAS, SNPs, genotyping-by-sequencing, wheat blast
URN:NBN:urn:nbn:se:slu:epsilon-p-115766
Permanent URL:
http://urn.kb.se/resolve?urn=urn:nbn:se:slu:epsilon-p-115766
Additional ID:
Type of IDID
DOI10.3390/plants10122693
Web of Science (WoS)000738658100001
ID Code:26899
Faculty:LTV - Fakulteten för landskapsarkitektur, trädgårds- och växtproduktionsvetenskap
Department:(LTJ, LTV) > Department of Plant Breeding (from 130101)
Deposited By: SLUpub Connector
Deposited On:03 Feb 2022 23:43
Metadata Last Modified:04 Feb 2022 06:01

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