Field Resistance to Brown Rust of Wheat

Diversity of genes for field resistance to Indian races of brown rust (Puccinia recondita Rob. ex Desm.) among thirteen resistant stocks was studied. Varieties Supremo-Mentana X Marquis X Renown² (E. 4717), Frontana-Maria Escobar X Gabo X Mayo 54) X Bonza (E. 4771), (Norin 10-B-17 X Y 53) Y 50), Kt 54 (E. 4871), Supremo-Mentana X Marquis-Renown² (E. 4894), II 50–17 X II 42–39 (E. 4000), and Cajeme 60 (E. 5165) were found to carry identical factors. Genes for resistance to brown rust in varieties Yaktana 54 X Norin 10-B-21 (E. 4845) and Supremo-Mentana X Marquis-Renown² (E. 5555) (E. 4894), K-340 X S/Mt-Gb X K-340-Fr-c-8038 (E. 5794), (II 50–18 X Norin 10-B-1) X-Y-54 (E. 5874) and Com-N/Mt+Fr (E. 6203) were found to be different from those carried by N.P. 852 and N.P. 835.