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Virulence frequency to powdery mildew resistances in winter barley cultivars

Author

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  • Antonín DREISEITL

    (Agrotest fyto, Kromeříž, Czech Republic)

Abstract

Virulence frequencies to powdery mildew resistances in winter barley cultivars mostly registered in the Czech Republic were studied in 2007 and 2008. Random samples of the air populations originating from winter and spring barley fields were obtained by means of a mobile version of a jet spore sampler. Conidia were sampled by driving across the Czech Republic. In total 349 isolates were studied and 17 differentials were used. The virulence frequencies to specific resistances of given cultivars showed wide range from 0% to 100%. Nine differentials were used to distinguish 134 pathotypes, of which 32 representing 63.9% of isolates were detected in both years. Pathotype 773, which broke down the resistance of eight differentials, was the most abundant. In 2008, lower virulence frequencies to all differentials, and thus lower population complexity, were determined, which may be caused by different regional origins of the isolates examined. Importance of the study of the given pathogen population is discussed in terms of successful breeding of resistant barley cultivars.

Suggested Citation

  • Antonín DREISEITL, 2008. "Virulence frequency to powdery mildew resistances in winter barley cultivars," Czech Journal of Genetics and Plant Breeding, Czech Academy of Agricultural Sciences, vol. 44(4), pages 160-166.
    • Handle: RePEc:caa:jnlcjg:v:44:y:2008:i:4:id:39-2008-cjgpb
    DOI: 10.17221/39/2008-CJGPB
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    Citations

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    Cited by:

    1. Antonín DREISEITL, 2015. "Rare virulences of barley powdery mildew found in aerial populations in the Czech Republic from 2009 to 2014," Czech Journal of Genetics and Plant Breeding, Czech Academy of Agricultural Sciences, vol. 51(1), pages 1-8.
    2. Antonín DREISEITL, 2011. "Changes in the population of Blumeria graminis f.sp. hordei in the Czech Republic from 2009 to 2010," Plant Protection Science, Czech Academy of Agricultural Sciences, vol. 47(2), pages 43-51.
    3. Antonín DREISEITL, 2012. "Frequency of powdery mildew resistances in spring barley cultivars in Czech variety trials," Plant Protection Science, Czech Academy of Agricultural Sciences, vol. 48(1), pages 17-20.
    4. Antonín DREISEITL, 2011. "Presence of the newly designated powdery mildew resistance Landi in some winter barley cultivars," Czech Journal of Genetics and Plant Breeding, Czech Academy of Agricultural Sciences, vol. 47(2), pages 64-68.
    5. Antonín DREISEITL, 2015. "Changes in virulence frequencies and higher fitness of simple pathotypes in the Czech population of Blumeria graminis f.sp. hordei," Plant Protection Science, Czech Academy of Agricultural Sciences, vol. 51(2), pages 67-73.

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