GrainGenes Reference Report: PLO-9:e105593
Reference
PLO-9:e105593
Title
Genome-Wide Association Mapping for Seedling and Adult Plant Resistance to Stripe Rust in Synthetic Hexaploid Wheat
Journal
PLoS ONE
Year
2014
Volume
9
Pages
e105593
Author
Zegeye H Rasheed A Makdis F
Abstract
Use of genetic diversity from related wild and domesticated species has made a significant contribution to improving wheat productivity. Synthetic hexaploid wheats (SHWs) exhibit natural genetic variation for resistance and/or tolerance to biotic and abiotic stresses. Stripe rust caused by (Puccinia striiformis f. sp. tritici; Pst), is an important disease of wheat worldwide. To characterise loci conferring resistance to stripe rust in SHWs, we conducted a genome-wide association study (GWAS) with a panel of 181 SHWs using the wheat 9K SNP iSelect array. The SHWs were evaluated for their response to the prevailing races of Pst at the seedling and adult plant stages, the latter in replicated field trials at two sites in Ethiopia in 2011. About 28% of the SHWs exhibited immunity at the seedling stage while 56% and 83% were resistant to Pst at the adult plant stage at Meraro and Arsi Robe, respectively. A total of 27 SNPs in nine genomic regions (1BS, 2AS, 2BL, 3BL, 3DL, 5A, 5BL, 6DS and 7A) were linked with resistance to Pst at the seedling stage, while 38 SNPs on 18 genomic regions were associated with resistance at the adult plant stage. Six genomic regions were commonly detected at both locations using a mixed linear model corrected for population structure, kinship relatedness and adjusted for false discovery rate (FDR). The loci on chromosome regions 1AS, 3DL, 6DS and 7AL appeared to be novel QTL; our results confirm that resynthesized wheat involving its progenitor species is a rich source of new stripe (yellow) rust resistance that may be useful in choosing SHWs and incorporating diverse yellow rust (YR) resistance loci into locally adapted wheat cultivars.
External Databases
http://journals.plos.org/plosone/article?id=10.1371/journal.pone.0105593 PubMed: 25153126
QTL
qNV.Yr-3A.1 qNV.Yr-4A.1 qNV.Yr-7A.1
Keyword
[ Hide all but 1 of 7 ] Chromosome mapping Chromosomes Gene mapping Genetic loci Hexaploidy Quantitative trait loci seedlings
Summarized in
MAS Wheat. Bringing Genomics to the Wheat Fields. Disease Resistance. Stripe Rust Resistance. Yr45 MAS Wheat. Marker Assisted Selection in Wheat.
GrainGenes is a product of the Agricultural Research Service of the US Department of Agriculture.
GrainGenes Reference Report: PLO-9:e105593
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GrainGenes is a product of the Agricultural Research Service of the US Department of Agriculture. | |||