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Genetic sources and loci for Fusarium head blight resistance in bread wheat

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Title Genetic sources and loci for Fusarium head blight resistance in bread wheat
 
Creator Lei Wu
Xinyao He
Yi He
Peng Jiang
Kaijie Xu
Xu Zhang
Singh, Pawan K.
 
Subject mycotoxins
vomitoxin
breeding
disease severity
food safety
gene frequency
genotyping
grain
inoculation
phenotypic variation
quantitative trait loci
single nucleotide polymorphism
genetics
 
Description Fusarium head blight (FHB) of wheat is an important disease worldwide, affecting the yield, end-use quality and threatening food safety. Genetic resources or stable loci for FHB resistance are still limited in breeding programs. A panel of 265 bread wheat accessions from China, CIMMYT-Mexico and other countries was screened for FHB resistance under 5 field experiments in Mexico and China, and a genome-wide association analysis was performed to identify QTLs associated with FHB resistance. The major locus Fhb1 was significantly associated with FHB severity and Deoxynivalenol content in grains. FHB screening experiments in multiple environments showed that Fhb1-harbouring accessions Sumai3, Sumai5, Ningmai9, Yangmai18 and Tokai66 had low FHB index, disease severity and DON content in grains in response to different Fusarium species and ecological conditions in Mexico and China. Accessions Klein Don Enrique, Chuko and Yumai34 did not have Fhb1 but still showed good FHB resistance and low mycotoxin accumulation. Sixteen loci associated with FHB resistance or DON content in grains were identified on chromosomes 1A, 1B, 2B, 3A, 3D, 4B, 4D, 5A, 5B, 7A, and 7B in multiple environments, explaining phenotypic variation of 4.43–10.49%. The sources with good FHB resistance reported here could be used in breeding programs for resistance improvement in Mexico and China, and the significant loci could be further studied and introgressed for resistance improvement against FHB and mycotoxin accumulation in grains.
 
Date 2022-09-30
2023-01-06T15:47:46Z
2023-01-06T15:47:46Z
 
Type Journal Article
 
Identifier Wu, L., He, X., He, Y., Jiang, P., Xu, K., Zhang, X., & Singh, P. K. (2022). Genetic sources and loci for Fusarium head blight resistance in bread wheat. Frontiers in Genetics, 13, 988264. https://hdl.handle.net/10883/22303
1664-8021
https://hdl.handle.net/10568/126663
https://hdl.handle.net/10883/22303
https://doi.org/10.3389/fgene.2022.988264
 
Language en
 
Rights CC-BY-4.0
Open Access
 
Format application/pdf
 
Publisher Frontiers Media SA
 
Source Frontiers in Genetics