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GrainGenes Reference Report: TAG-123-143

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Reference
TAG-123-143
Title
Mapping and validation of QTL which confer partial resistance to broadly virulent post-2000 North American races of stripe rust in hexaploid wheat
Journal
Theoretical and Applied Genetics
Year
2011
Volume
123
Pages
143-157
Author
Lowe I
Jankuloski L
Chao SM
Dubcovsky J
Abstract
A mapping population of 186 recombinant inbred lines developed from a cross between UC1110, an adapted California spring wheat, and PI610750, a synthetic derivative from CIMMYT's Wide Cross Program, was evaluated for its response to current California races of stripe rust (Puccinia striiformis f. sp. tritici) in replicated field trials over four seasons (2007-2010) in the northern Sacramento Valley. A genetic map was constructed consisting of 1,494 polymorphic probes (SSRs, DArTs, and ESTs) mapped to 558 unique loci, and QTL analysis revealed the presence of four stripe rust resistance QTL segregating in this population, two from UC1110 (on chromosomes 3BS and 2BS) and two from PI610750 (5AL and 2AS). The two QTL of largest effects (on 3BS and 5AL) were validated in independent populations and their intervals narrowed to 2.5 and 5.3 cM, respectively. The 3BS QTL was shown, by allelism test and genotype, to carry a gene different from the Yr30/Sr2 complex. Mapped position also suggests that the 3BS QTL is associated with a gene different from either Yrns-B1 or YrRub, two stripe rust resistance genes mapped to this region in other studies. The 5AL QTL carries a previously unreported partial stripe rust resistance gene, designated here as Yr48. This paper discusses the individual contributions to resistance of these four QTL, their epistatic interactions, and their potential in durable resistance breeding strategies based on combinations of partial resistance genes.
External Databases
http://link.springer.com/article/10.1007%2Fs00122-011-1573-0
PubMed: 21455722
Gene
Sr2 (Triticum)
Locus
Yr48
[ Show all 1744 ]
Map Data
Wheat, UC1110 x PI610750
Probe
SNF-A2
BE495011
CFA2149
QTL
QYr.ucw-2A_PI610750
QYr.ucw-2B_UC1110
QYr.ucw-3BS_UC1110
QYr.ucw-5AL_PI610750
Summarized in
ReferenceHegarty J et al. MAS Wheat. Bringing Genomics to the Wheat Fields. Disease Resistance. Stripe Rust Resistance. Yr48 MAS Wheat. Marker Assisted Selection in Wheat.