Sr44

Data courtesy of Tom Fetch

Related Gene Photos

Awardees 2012 gene_winners.jpg 2012 Gene Stewardship Awardees	Awardees 2013 gene_stewards_2013.jpg 2013 Gene Stewardship Awardees	Awardees 2014 2014_gene_stewards.JPG	Coffman-Bedada L1040685.JPG Ronnie Coffman (2nd from l) and Dr. Bedada Girma (r) of the Ethiopian Institute of Agricultural Research are checking wheat fields with farmers in Ethiopia who have adopted rust resistant varieties of wheat for rust. L. McCandless
coffman-jeanie JeanieBorlaug_Coffman.jpg	Coffman-Kumarse-Braun IMG_6737.JPG

Breeder's Toolbox

Ug99 Effectiveness:
-Virulence for the gene is known to occur in other races
-Unsuitable for utilization due to linkage with undesirable traits in the translocation
Source: RustTracker.org
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Liu et al. (2012) developed a compensating 7DL.7JS Robertsonian translocation with Sr44 from Th. intermedium. Homoeologous recombination to reduce the size of this translocation is underway. A second stem rust resistance gene from the same source and effective against isolates in the Ug99-race complex was identified on chromosome 7JL from the original donor stock. According to information for SrAgi (a synonym for Sr44) described in McIntosh et al. (1995) this latter gene was apparently not effective in early Australian studies because races virulent for Sr44 were virulent on addition line TAF2 which carried an entire 7JS chromosome pair.
Source: Mike Pumphrey, BGRI 2012 Presentation: Stocking the Breeder's Toolbox