GrainGenes Reference Report: TPG-2022:e20222
Reference
TPG-2022:e20222
Title
Genetics of Fusarium head blight resistance in soft red winter wheat using a genome-wide association study
Journal
The Plant Genome
Year
2022
Volume
2022
Author
[ Hide all but 1 of 9 ] Ghimire B Mergoum M Martinez-Espinoza AD Sapkota S Pradhan S Ali Babar M Bai G Dong Y Buck W
Abstract
Host resistance is an effective and sustainable approach to manage the negative impact of Fusarium head blight (FHB) on wheat (Triticum aestivum L.) grain yield and quality. The objective of this study was to characterize the phenotypic responses and identify quantitative trait loci (QTL) conditioning different FHB resistance types using a panel of 236 elite soft red winter wheat (SRWW) lines in a genome-wide association study (GWAS). The panel was phenotyped for five FHB and three morphological traits under two field and two greenhouse environments in 2018-2019 and 2019-2020. We identified 160 significant marker-trait associations (MTAs) for FHB traits and 11 MTAs for plant height. Eleven QTL showed major effects and explained >10% phenotypic variation (PV) for FHB resistance. Among these major loci, three QTL were stable and five QTL exhibited a pleiotropic effect. The QTL QFhb-3BL, QFhb-5AS, QFhb-5BL, QFhb-7AS.1, QFhb-7AS.2, and QFhb-7BS are presumed to be novel. Pyramiding multiple resistance alleles fromall the major-effect QTL resulted in a significant reduction in FHB incidence, severity, index, deoxynivalenol (DON), and Fusarium-damaged kernel (FDK) by 17, 43, 45, 55, and 25%, respectively. Further validation of these QTL could potentially facilitate successful introgression of these resistance loci in new cultivars for improved FHB resistance in breeding programs.
External Databases
https://doi.org/10.1002/tpg2.20222
QTL
QFhb.SRWW-1BL.1
[ Show all 14 ]
GrainGenes is a product of the Agricultural Research Service of the US Department of Agriculture.
GrainGenes Reference Report: TPG-2022:e20222
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GrainGenes is a product of the Agricultural Research Service of the US Department of Agriculture. | |||