Inheritance of scald resistance in barley. I. Resistance of genes of group A barley cultivars

Abstract

The genetic basis of resistance and susceptibility of barley cultivars to Rhynchosporium secalis (Oud.) Davis was determined from F₂ and F₃ progenies of crosses among five resistant and four susceptible cultivars. The resistant cultivars Psaknon,

Atlas 46, Atlas 57, Hudson and Turk were found to share a common gene in addition to other genes for resistance. No race of the pathogen found in Western Australia was able to overcome the resistance conferred by the common gene. The effectiveness of the identified resistance genes to two isolates of R. secalis was studied under glasshouse conditions in winter and summer, and in the field during winter.