Inheritance of scald resistance in barley. II.* Resistance genes of group B barley cultivars

Abstract

The genetic basis of resistance to Rhynchosporium secalis (Oud.) Davis of barley cultivars La Mesita, West China and Sakigake differentiated as group B were determined from F₂, F₃ and BC₁ progenies. The resistance genes identified are situated at different loci from each other. The effectiveness of the identified resistance genes to two isolates of Rhynchosporium secalis was studied under glasshouse conditions in winter and in summer, and also in the field. The inheritance of resistance genes of group B cultivars was found to be greatly influenced by environmental factors.

*Part I, Aust. J. Agric. Res., 26: 243 (1975).