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Research article - Peer-reviewed, 2021

Screening and Mapping for Head Blast Resistance in a Panel of CIMMYT and South Asian Bread Wheat Germplasm

He, Xinyao; Juliana, Philomin; Kabir, Muhammad R.; Roy, Krishna K.; Islam, Rabiul; Marza, Felix; Peterson, Gary; Singh, Gyanendra P.; Chawade, Aakash; Joshi, Arun K.; Singh, Ravi P.; Singh, Pawan K.


Wheat blast (WB) is a destructive disease in South America and its first outbreak in Bangladesh in 2016 posed a great risk to food security of South Asian countries. A genome wide association study (GWAS) was conducted on a diverse panel of 184 wheat genotypes from South Asia and CIMMYT. Phenotyping was conducted in eight field experiments in Bolivia and Bangladesh and a greenhouse experiment in the United States. Genotypic data included 11,401 SNP markers of the Illumina Infinium 15K BeadChip and four additional STS markers on the 2NS/2AS translocation region. Accessions with stable WB resistance across experiments were identified, which were all 2NS carriers. Nevertheless, a dozen moderately resistant 2AS lines were identified, exhibiting big variation among experiments. Significant marker-trait associations (MTA) were detected on chromosomes 1BS, 2AS, 6BS, and 7BL; but only MTAs on 2AS at the 2NS/2AS translocation region were consistently significant across experiments. The resistant accessions identified in this study could be used in production in South Asian countries as a preemptive strategy to prevent WB outbreak.


GWAS; resistance screening; Magnaporthe oryzae; Pyricularia oryzae; MoT

Published in

Frontiers in Genetics
2021, volume: 12, article number: 679162

Authors' information

He, Xinyao
International Maize and Wheat Improvment Centre (CIMMYT)
Juliana, Philomin
International Maize and Wheat Improvement Center (CIMMYT)
Kabir, Muhammad Rezaul
Bangladesh Wheat and Maize Research Institute
Roy, Krishna K.
Bangladesh Wheat and Maize Research Institute
Islam, Rabiul
Bangladesh Wheat and Maize Research Institute
Marza, Felix
Instituto Nacional de Innovación Agropecuaria y Forestal (INIAF)
Peterson, Gary
United States Department of Agriculture (USDA)
Singh, Gyanendra P.
Indian Council of Agricultural Research (ICAR)
Swedish University of Agricultural Sciences, Department of Plant Breeding
Joshi, Arun K.
Singh, Ravi P.
International Maize and Wheat Improvment Centre (CIMMYT)
Singh, Pawan K.
International Maize and Wheat Improvment Centre (CIMMYT)

Sustainable Development Goals

SDG2 Zero hunger

UKÄ Subject classification

Genetics and Breeding

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