Identification of physiological races of wheat brown rust in east Azarbaidjan
1995
Mahdyan, S.A. (Tarbiat Modarres Univ., Tehran (Iran Islamic Republic)) | bamdadian, A. | Torabi, M. (Plant Diseases Research Dept., Plant Pests and Diseases Research Institute, Tehran (Iran Islamic Republic))
Twenty one wheat leaf samples infected with brown rust (Puccinia recondita) were collected from different areas of east Azarbidjan and Ardebil Provinces. In the greenhouse, spores of all samples were purified using single pustule and single spore procedures. Urediniospores of each isolate were separately inoculated on the first leaves of 8 differential varieties for race identification. Results obtained from this experiment showed that, races 12, 45, 54, 57, 84, 176 and biotypes 45A and 84B were present in these areas. Races 57 and 84 had been reported earlier from Iran, but races 12, 45, 54,176 and 84A and 45A are new for Iran. races 45 and 84 with 28.57 and 23.8 of frequencies respectively were the most prevalent races. According to the Lr resistance genes present in the differential varieties and their reaction to the race identified here, it is postulated that LrI and LRII resistance genes are effective in these areas
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