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Virulence frequencies to powdery mildew resistance genes of winter barley cultivars

Author

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  • Antonín Dreiseitl

    (Agrotest, Agricultural Testing, Advisory Services and Research Ltd., Kroměříž, Czech Republic)

Abstract

The virulence frequencies to powdery mildew resistance genes possessed by winter barley cultivars registered and newly tested in the Czech Republic were studied in 2000, 2002 and 2004. Random samples of the populations originating from winter and spring barley fields were obtained from the air by a mobile version of a jet spore sampler mounted on a car roof. Conidia were sampled by driving across the Czech Republic. Fourteen differentials, carrying 18 out of 20 currently identified resistance genes present in winter barley cultivars, were used. High virulence frequencies (85-100%) to most resistance genes were found. Lower virulence frequencies (14.1-40.1%) were found to only three resistance genes that have not been described yet; their preliminary designations are Ml(Va), Ml(Dt) and Ml(Ca). The importance of resistance of winter barley cultivars is discussed with respect to limiting the speed with which the pathogen adapts to genetic resistances possessed by commercial cultivars of both winter and spring barley, and to the necessity of lowering the costs for powdery mildew control in barley.

Suggested Citation

  • Antonín Dreiseitl, 2004. "Virulence frequencies to powdery mildew resistance genes of winter barley cultivars," Plant Protection Science, Czech Academy of Agricultural Sciences, vol. 40(4), pages 135-140.
    • Handle: RePEc:caa:jnlpps:v:40:y:2004:i:4:id:466-pps
    DOI: 10.17221/466-PPS
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    Citations

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    Cited by:

    1. Antonín Dreiseitl, 2007. "Variety resistance of winter barley to powdery mildew in the field in 1976-2005," Czech Journal of Genetics and Plant Breeding, Czech Academy of Agricultural Sciences, vol. 43(3), pages 87-96.
    2. Antonín Dreiseitl, 2007. "Severity of powdery mildew on winter barley in the Czech Republic in 1976-2005," Plant Protection Science, Czech Academy of Agricultural Sciences, vol. 43(3), pages 77-85.
    3. 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.
    4. Antonín Dreiseitl, 2006. "Powdery Mildew Resistance of Winter Barley Varieties in Czech Official Trials," Czech Journal of Genetics and Plant Breeding, Czech Academy of Agricultural Sciences, vol. 42(2), pages 38-43.
    5. 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.

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