Sr45

Data courtesy of Tom Fetch

Breeder's Toolbox

Ug99 Effectiveness:
-Virulence for the gene is known to occur in other races
-Level of resistance conferred in the field usually inadequate under high disease pressure
Source: RustTracker.org
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Sr45 is an Ae. tauschii-derived stem rust resistance gene on chromosome 1DS (Sambasivam et al. 2008). Deployment of Sr45 has not been documented to date, but is possible due to the use of Ae. tauschii-derived germplasm in many programs; this gene is effective against TTKSK, but does not confer resistance to many other races found throughout the world. Due to their similar, but not identical, chromosome positions, efforts to recombine Sr33 and Sr45 into a linkage block on chromosome 1DS are underway (Lagudah unpublished). This should improve the value of deploying these genes.
Source: Mike Pumphrey, BGRI 2012 Presentation: Stocking the Breeder's Toolbox