Reaction of Wheat Genotypes to T. laevis Kühn and T. controversa Kühn, the Common and Dwarf Bunts Pathogens in the Dry Highlands of Iran

Common and dwarf bunts are the most important diseases of wheat in the Kurdistan province, west of Iran. In this study, to investigate the reaction of wheat genotypes (grouped into two cold and warm season genotypes), they were evaluated for infection to common and dwarf bunts during 2007 and 2008 cropping seasons. Plant materials were groups of wheat genotypes included 82 and 158 genotypes from the cold and warm areas which were assessed in this study. For present study, wheat seeds were inoculated by common and dwarf bunts teliospores before planting, and sowing was accomplished during fall season of 2007 and 2008 at Ghamlou and Saral experimental stations. At maturity time, the percentage of infected heads and the main reactions were determined. Results revealed that resistance of genotypes to dwarf bunt was higher than common bunt and also bunt incidence of durum genotypes was relatively lower than bread wheat genotypes. The results demonstrated the existence of resistance gene analogues in durum wheat genotypes which could be used as donor progenitors. Replacement of durum wheat cultivars instead of bread wheat varieties could be an effective way in the developing of substantial farming.