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Wheat rusts are the most important causes of wheat damage in many parts of the world. Using resistant cultivars is the most effective and economical way to control them. In order to evaluation resistance of 368 rainfed durum and bread wheat genotypes to cereal rusts in adult and seedling plant stages, this study was carried out at the farm conditions depending on the type of rust at five different research stations across the country viz., Zazghan (Fars), Ardebil, Ahvaz, Gonbad, Kalardasht. Seedling stage studies were carried out under controlled conditions of greenhouse at Cereal Pathology Unit, SPII, Karaj using YR (98-92) and YR (98-63) isolates for yellow rust and L98-18 and 98-8 for leaf rust, rspectively. In filed conditions (Ardabil and Zarghan) out of the 368 genotypes, 308 and 327 lines / cultivars were resistant or semi-resistant to yellow rust isolates, respectively and interestingly, resistance of durum wheat to both isolates was significantly higher than bread wheat. Among the total genotypes due to lack of facilities, only elites were studied in the greenhouse. Out of 192 genotypes studied, 42 genotypes were resistant to both YR98-92 and YR98-63 isolates. Rizhav, Prav, Ivan and Saein cultivars also showed resistance to both isolates. Out of 368 lines / bread and durum wheat cultivars in Kelardasht, 94 resistant genotypes, 161 were semi-resistant to stem rust in field conditions. And the rest were sensitive or semi-sensitive or very sensitive. The results of stem rust in Ardabil have not been reported due to lack of proper disease establishment. Regarding wheat leaf rust, in Ahvaz, out of 368 genotypes, only genotype number 219 was resistant and 263 genotypes were semi-resistant to this disease and the rest were sensitive or semi-susceptible or very sensitive. In Gorgan, 238 genotypes were semi-resistant to disease and the rest were often susceptible and very sensitive. Among the total genotypes due to lack of facilities, only elites were studied in the greenhouse. Out of 192 genotypes studied, 73 genotypes were resistant to all 4 isolates LR98-18 and LR98-8, 18 and LR97-4, 18 and LR94-5 or they were semi-resistant
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