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GrainGenes Reference Report: GGG-6-2237

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Reference
GGG-6-2237
Title
Genetic architecture of resistance to stripe rust in a global winter wheat germplasm collection.
Journal
G3: Genes, Genomes, Genetics
Year
2016
Volume
6
Pages
2237-2253
Author
Bulli P
Zhang J
Chao S
Chen X
Pumphrey M
Abstract
Virulence shifts in populations of Puccinia striiformis f. sp. tritici (Pst), the causal pathogen of wheat stripe rust, are a major challenge to resistance breeding. The majority of known resistance genes are already ineffective against current races of Pst, necessitating the identification and introgression of new sources of resistance. Germplasm core collections that reflect the range of genetic and phenotypic diversity of crop species are ideal platforms for examining the genetic architecture of complex traits such as resistance to stripe rust. We report the results of genetic characterization and genome-wide association analysis (GWAS) for resistance to stripe rust in a core subset of 1175 accessions in the National Small Grains Collection (NSGC) winter wheat germplasm collection, based on genotyping with the wheat 9K single nucleotide polymorphism (SNP) iSelect assay and phenotyping of seedling and adult plants under natural disease epidemics in four environments. High correlations among the field data translated into high heritability values within and across locations. Population structure was evident when accessions were grouped by stripe rust reaction. GWAS identified 127 resistance loci that were effective across at least two environments, including 20 with significant genome-wide adjusted P-values. Based on relative map positions of previously reported genes and QTL, five of the QTL with significant genome-wide adjusted P-values in this study represent potentially new loci. This study provides an overview of the diversity of Pst resistance in the NSGC winter wheat germplasm core collection, which can be exploited for diversification of stripe rust resistance in breeding programs.
External Databases
https://doi.org/10.1534/g3.116.028407
Germplasm
CItr10090
[ Show all 1175 ]
Map Data
Wheat, Yr Update, 2021
QTL
QYr.wsu-1A.1
[ Show all 20 ]

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