“…Therefore, based on the quantitative scale de ned here, Iranian wheat cultivars with a mean DS value of 36.87% were categorized as susceptible while commercial world cultivars with a mean DS value of 14.81% were classi ed as moderately resistant cultivars to SNB. The ndings regarding the response of differential and world commercial cultivars to SNB were in line with qualitative assays conducted by previous researchers where BR34 was classi ed as highly resistant, Erik, M-3, Vernapolis, and Arina as resistant, ND 495 and Katepwa as moderately susceptible, 4B-160 and Coulter as susceptible, and Grandin as highly susceptible cultivar to SNB(Liu et al, 2004;Singh et al, 2006;Károlyiné Cséplő et al, 2013;Tommasini et al, 2007). Hence, the utilization of the quantitative scale as a substitutional assay for assessing the response of wheat cultivars to P. nodorum provides a more precise and reliable approach, which can serve as a valuable parameter in breeding programs.NE in ltration represents one of the simplest and quickest strategies for evaluating the sensitivity reaction of host plants.…”