ارزیابی مقاومت ارقام و لاینهای امیدبخش جو نسبت به سفیدک سطحی جو در مناطق مختلف کشور

Powdery mildew caused by Erysiphe graminis, is one of the disease of barley in Iran. Natural infection caused by the fungus in this areas provides the possibikity of selection of resistant lines and cultivars od barley to Erysiphe graminis. 114 lines and barley were sown in the two lines with 1 meter lenght in the field. The experiment were carried out under natural conditions during two consecutive year of 2002-2004 at the farm of Agricultural Research Torgh Mashhad Station (40 genotypes), Miandoab Station (39 genotypes) and gorgan Station (36 genotypes). The genetical evaluation of cultivars based on saari and prescot modif scale, were made with regard to their type and severity of infection. according to the results in Mashhad, Miandoab and Gorgan Stations, 3,35 and and 1 genotype were evaluated as resistant (R), 7,0 and 1 as Moderate resistant (MR), 3,3 and 33 as Moderate susceptible (MS) and 27,1 and 1 as susceptible.

Keywords:

جو , سفیدک سطحی , مشهد , گرگان , میاندوآب , ایستگاه تحقیقات کشاورزی طرق