Seedling resistance to Stagonospora nodorum blotch in wheat genotypes

Abstract

Cséplő M., Csősz M., Gál M., Veisz O., Vida G. (2013): Seedling resistance to Stagonospora nodorum blotch in wheat genotypes. Czech. J. Genet. Plant Breed., 49: 77-85.In two independent experiments set up in the greenhouse the seedling resistance to Stagonospora nodorum blotch was investigated in 92 varieties, breeding lines and genotypes with a known genetic background. The greatest area under the disease progress curve calculated from lesion type was 37.06, while in the case of the most resistant genotype this value was 0.38. Many of the lines and varieties bred in Martonvásár proved to have excellent resistance in terms of both percentage of infected leaf area and lesion type. Observations indicate that, depending on the aim of the experiment, the efficient selection of breeding lines is possible in the seedling stage either on the basis of the area under the disease progress curve calculated for lesion types, or on the basis of lesion types scored 7, 11 or 14 days after inoculation.

Host susceptibility and fungal virulence in the wheat-Parastagonospora nodorum interactions

“…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.…”