گزارش نهایی طرح ارزیابی واکنش ژنوتیپهای گندم مربوط به آزمایشات مقایسه عملکرد مقدماتی و پیشرفته ‭(PRWYT ARWYT) ‬یکنواخت سال زراعی ‮‭80-81‬ اقلیم معتدل نسبت به بیماری زنگ زرد (گزارش منطقه اردبیل)

Yellow rust is the most important u iscase or wheal in Iran, which causes high yield losses in epidemic years. The use and production of resistant cultivars is the best controling method for disease. For this purpose, reaction evaluation of 345 genotypes (including: 285 genotypes of PRWYT entries and 60 g.enotypes of AR WYT cntrics) to yellow rust was carried out underfieJd condition and mist irrigation in 2001.20U2 cropping ycar. Besides, "rtilicial inoculation ofthc nursery was done by mixing of spores with liIklll1\ powder at sunset lime using duster and before developing of nag leaf. At adult plant stage, infection type (IT) of each entry was evulllatcd based on Roell's el a/. method. when disease developed well on slIs<.:epliblc che<.:k. The pcr<.:cnll<1gc leal' mea 12) and I % had mixed reaction. In this research, we also concluded that for AR WYT entries 40% of genotpes wcre resistant, 21.6% moderately resistant, 21.6% moderately susceptible, 10% susceptible and 6.6% had mixed reaction. Resistant lines or cultivars were introduced to SPII so that another evaluations can be condllded in future. Kcy \Yonls: WIIc'lt, Yellow Rust, Resistance Evalu'ltion.