Cytogenetical Studies in Wheat III. Studies of a Gene Conditioning Resistance to Stem Rust Strains with Unusual Genes for Avirulence

Abstract

A dominant gene conditioning resistance to certain stem rust strains each with unusual genes for avirulence was located on chromosome ID. It was found to be widespread among bread wheats, and is present in many Australian cultival's, some of which possess no resistance to strains of wheat stem rust prevalent in the field. Pathogenic tests indicated that it was identical with a gene described previously by North American investigators. As it is different from any of the previously catalogued genes in wheat for stem rust resistance the designation Sr18 is proposed.