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Development of an international standard set of barley differential genotypes for Pyrenophora teres f. teres

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Afanasenko, O. S., Jalli, M., Pinnschmidt, H. O., Filatova, O. and Platz, G. J. (2009) Development of an international standard set of barley differential genotypes for Pyrenophora teres f. teres. Plant Pathology, 58 (4). pp. 665-676. ISSN 0032-0862

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Article Link: https://doi.org/10.1111/j.1365-3059.2009.02062.x

Publisher URL: https://bsppjournals.onlinelibrary.wiley.com/doi/abs/10.1111/j.1365-3059.2009.02062.x


International comparison of virulence profiles of Pyrenophora teres f. teres (Ptt), the cause of barley net blotch, is seriously restricted by inconsistencies in differential testers used among researchers. This paper reports an attempt to develop an appropriate set of differentials to standardize characterization of Ptt populations globally. Fourteen barley genotypes (Canadian Lake Shore (CLS), Harbin, c-8755, c-20019, Manchurian, Tifang, CI 9825, CI 5791, CI 9819, Beecher, CI 9214, Skiff, Prior and Corvette) were selected from among genotypes previously used as Ptt differentials. Three cultivars (Pirkka, Haruna Nijo and Harrington) were included to identify a universally susceptible control. Genotypes were inoculated with approximately 1000 Ptt isolates from Russia, Europe, Australia and Canada. The mean reaction frequency of genotypes ranged from highly resistant (CI 9819, CI 5791, c-8755 and CI 9825) to highly susceptible (Harrington, Haruna Nijo and Pirkka). The best differential abilities were demonstrated by Harbin, CLS, c-20019, Manchurian and Prior. Application of cluster analyses identified genotypes with similar reaction patterns, which supported a reduction of genotypes in the set. When combined with an algorithm comparing the ability of individual genotypes to discriminate among Ptt isolates, a further reduction of genotypes was justified. A new, concise set of barley genotypes for differentiating virulences in Ptt was formulated. It is proposed that these genotypes be adopted as the standard, international differential set to characterize and identify the virulence properties of Ptt populations across environments. The new Ptt differential set consists of the genotypes c-8755, c-20019, CI 5791, CI 9825, CLS, Harbin, Prior, Skiff and Harrington.

Item Type:Article
Business groups:Crop and Food Science
Keywords:Differential hosts; Drechslera teres; Hordeum vulgare; Net form of net blotch; Pathogen population diversity; Virulence
Subjects:Science > Botany > Genetics
Plant culture > Field crops > Barley
Plant pests and diseases > Plant pathology
Live Archive:02 Feb 2022 05:34
Last Modified:02 Feb 2022 05:34

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