Physiologic Differentiation of Wheat Stem Rust on Rye

Five self-fertile lines of Secale cereale possessing single genes conferring resistance to stem rust were successfully used to differentiate between strains of Puccinia graminis tritici. In an earlier study four of these lines were shown to differentiate between Australian cultures of P. graminis secalis. Gene H transferred from Wrens-5 rye to one of the five lines appears to be identical with gene Sr27 in Acosta's wheat-Imperial rye translocation stock WRT 238.5.