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GrainGenes Reference Report: GGG-5-449

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Reference
GGG-5-449
Title
A Genome-Wide Association Study of Resistance to Stripe Rust (Puccinia striiformis f. sp. tritici) in a Worldwide Collection of Hexaploid Spring Wheat (Triticum aestivum L.)
Journal
G3: Genes, Genomes, Genetics
Year
2015
Volume
5
Pages
449-465
Author
Maccaferri M
[ Show all 10 ]
Abstract
New races of Puccinia striiformis f. sp. tritici (Pst), the causal pathogen of wheat stripe rust, show high virulence to previously deployed resistance genes and are responsible for large yield losses worldwide. To identify new sources of resistance we performed a genome-wide association study (GWAS) using a worldwide collection of 1000 spring wheat accessions. Adult plants were evaluated under field conditions in six environments in the western United States, and seedlings were tested with four Pst races. A single-nucleotide polymorphism (SNP) Infinium 9K-assay provided 4585 SNPs suitable for GWAS. High correlations among environments and high heritabilities were observed for stripe rust infection type and severity. Greater levels of Pst resistance were observed in a subpopulation from Southern Asia than in other groups. GWAS identified 97 loci that were significant for at least three environments, including 10 with an experiment-wise adjusted Bonferroni probability < 0.10. These 10 quantitative trait loci (QTL) explained 15% of the phenotypic variation in infection type, a percentage that increased to 45% when all QTL were considered. Three of these 10 QTL were mapped far from previously identified Pst resistance genes and QTL, and likely represent new resistance loci. The other seven QTL mapped close to known resistance genes and allelism tests will be required to test their relationships. In summary, this study provides an integrated view of stripe rust resistance resources in spring wheat and identifies new resistance loci that will be useful to diversify the current set of resistance genes deployed to control this devastating disease.
External Databases
http://doi.org/10.1534/g3.114.014563
Gene
Yr78 (Triticum)
Germplasm
CItr12691
[ Show all 875 ]
Locus
cos1Hb
[ Show all 1041 ]
Map Data
Wheat, Yr genes and QTL
Wheat, Yr Update, 2021
QTL
[ Hide all but 1 of 82 ]
QYr.ucw-1B
QYr.ucw-1D
QYr.ucw-2A.2
QYr.ucw-2A.3
QYr.ucw-3B.2
QYr.ucw-4A
QYr.ucw-4D
QYr.ucw-5A.1
QYr.ucw-6B
QYr.ucw-6D
QYrid.ui-1A_RioBlanco
QYr.tam-1A_Avocet-YrA
QYr.sgi-1A.1_Kariega
QYr.tam-1AS_TAM111
QYr.sun-1A_Janz
QYr.tam-1AL_TAM112
QYr.caas-1AL_Naxos
QYr.cim-1AL_Pastor
Yr10
Yr9
QYr.cau-1BS_AQ24788-53
YrAlp
Yr15
YrH52
Yr64
Yr65
Yr24/Yr26
YrExp1
Yr29/Lr46
QYr.cim-1BL_Pastor (Lr46/Yr29)
Yr17 (2NS - 2AS translocation)
Yr56
Yrxy2
Yr32
Yr1
YrP81
YrC51
Yr41
YrKK
YrH9014
Yr27
Yr5
Yr44
Yr53
Yr43
Yr3
Yr55
Yr54
Yr4
Yr57
Yr30
Yrns-B1
Yr66
Yr49
Yr45
Yr51
Yr60
Yr50
Yr62
Yr28
YrAS2388
Yr46/Lr67
Yr48
Yr34
Yr47
YrExp2
Yr40
YrLM168
Yr35
Yr36
Yr61
Yrxy1
Yr63
Yr39
YrC591
Yr67
YrZH84
Yr52
Yr59
Yr33
Yr18/Lr34 (csLV23)
QYr.ucw-1B (IWA3892)
Keyword
association mapping
bread wheat
disease resistance
genetic map
yellow rust

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