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GrainGenes Reference Report: TAG-121-65

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Reference
TAG-121-65
Title
Genetics and mapping of stem rust resistance to Ug99 in the wheat cultivar Webster.
Journal
Theoretical and Applied Genetics
Year
2010
Volume
121
Pages
65-69
Author
Hiebert CW
Fetch TG
Zegeye T
Abstract
New races of wheat stem rust, namely TTKSK (Ug99) and its variants, pose a threat to wheat production in the regions where they are found. The accession of the wheat cultivar Webster (RL6201) maintained at the Cereal Research Centre in Winnipeg, Canada, shows resistance to TTKSK and other races of stem rust. The purpose of this study was to study the inheritance of seedling resistance to stem rust in RL6201 and genetically map the resistance genes using microsatellite (SSR) markers. A population was produced by crossing the stem rust susceptible line RL6071 with Webster. The F2 and F3 were tested with TPMK, a stem rust race native to North America. The F3 was also tested with TTKSK. Two independently assorting genes were identified in RL6201. Resistance to TPMK was conferred by Sr30, which was mapped with microsatellites on chromosome 5DL. The second gene, temporarily designated SrWeb, conferred resistance to TTKSK. SrWeb was mapped to chromosome 2BL using SSR markers. Comparison with previous genetic maps showed that SrWeb occupies a locus near Sr9. Further analysis will be required to determine if SrWeb is a new gene or an allele of a previously identified gene.
External Databases
https://doi.org/10.1007/s00122-010-1291-z
Allele
Sr9h (Triticum)
Gene
SrWeb (Triticum)
Germplasm
RL6203
WEBSTER

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