Studies on the rust-resistance of cereals. III.: Susceptibility of various species of Hordeum and its related genera to the leaf-rust of barley, Puccinia Hordei OTTH.

Abstract

Seedlings of 37 varieties or strains of 9 species of Hordeum, 50 varieties or strains of 16 species of Triticum, 34 varieties or strains of 17 species of Aegilops., 4 species of Elymus, 9 species of Agropyron, Haynaldia villosa, Lolium remotum, Avena sativa, 5 selections of Aegilotricum and 2 selections of Agrotticum were tested for susceptibility to Puccinia Hordei OTTH. The experimental results are sulnmarized as follows : -1. A-mong the 9 = species of Hordeum, (37 varieties or strains) Hordeum agrlocrithon. H. distichum var. tridax, H. sponianeum and H. vulgare were susceptible ; while Hordeum murinum. H. nodosum, H. pusillum, H. Gussoneanum and H. jubatum were highly resistant or immune. 2. A11 of the tested -16 species of Triticum, 17 species of Aegilops, 9 species of Agropyron, 4 species of Elymus, Havnaldia villosa, Lolium remotum, Aveud sativa, 5 selections of Aegilotricunl and 2 selections of Agrotricum were highly resistant or immune.