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GrainGenes Reference Report: TAG-129-1373

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Reference
TAG-129-1373
Title
Genetic mapping of SrCad and SNP marker development for marker-assisted selection of Ug99 stem rust resistance in wheat
Journal
Theoretical and Applied Genetics
Year
2016
Volume
129
Pages
1373-1382
Author
[ Hide all but 1 of 13 ]
Kassa MT
You FM
Fetch TG
Fobert P
Sharpe A
Pozniak CJ
Menzies JG
Jordan MC
Humphreys G
Zhu T
Luo M-C
McCartney CA
Hiebert CW
Abstract
Wheat stem rust, caused by Puccinia graminis f. sp. tritici, is a devastating disease of wheat worldwide. Development of cultivars with effective resistance has been the primary means to control this disease, but the appearance of new virulent strains such as Ug99 has rendered most wheat varieties vulnerable. The stem rust resistance gene SrCad located on chromosome arm 6DS has provided excellent resistance to various strains of Ug99 in field nurseries conducted in Njoro, Kenya since 2005. Three genetic populations were used to identify SNP markers closely linked to the SrCad locus. Of 220 SNP markers evaluated, 27 were found to be located within a 2 cM region surrounding SrCad. The diagnostic potential of these SNPs was evaluated in a diverse set of 50 wheat lines that were primarily of Canadian origin with known presence or absence of SrCad. Three SNP markers tightly linked proximally to SrCad and one SNP that co-segregated with SrCad were completely predictive of the presence or absence of SrCad. These markers also differentiated SrCad from Sr42 and SrTmp which are also located in the same region of chromosome arm 6DS. These markers should be useful in marker-assisted breeding to develop new wheat varieties containing SrCad-based resistance to Ug99 stem rust.
External Databases
https://doi.org/10.1007/s00122-016-2709-z
Gene
SrCAD (Triticum)

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