مطالعه اجزاء مقاومت در مرحله گياهچه اي و مقاومت مزرعه اي در لاين هاي اليت گندم نسبت به بيماري زنگ قهوه اي

Study of Resistance Components at Seedling Stage and Field Resistance to Leaf Rust in some Elite Wheat Lines

In the present study resistance of some elite lines of wheat at seedling stage were evaluated in cereal rusts greenhouse at Seed and Plant Improvement Institute in Karaj and at adult plant stage in Ahvaz under artificial inoculation with an isolate of leaf rust from Ahvaz. For seedling resistance, different components of resistance were measured. The results showed that lines M-85-1, M-86-1 and C-85-10 had lower infection types, latent period and smaller pustules size and number. In field experiment some lines showed resistance at adult plant stage. In general, 18 out of 62 lines were resistant at seedling and adult plant stages and 13 lines were susceptible at both stages. Lines C-85-15, C-86-7, C-86-9, M-85-11, M-86-6, M-86-5 and M-86-10 were susceptible at seedling stage and resistant at adult plant stage.