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Evaluation of resistance to Fusarium head blight in wheat using different sources of inoculum

Author

Listed:
  • Václav ŠÍP

    (Crop Research Institute, Prague-Ruzyně, Czech Republic)

  • Jana CHRPOVÁ

    (Crop Research Institute, Prague-Ruzyně, Czech Republic)

  • Lenka ŠTOČKOVÁ

    (Crop Research Institute, Prague-Ruzyně, Czech Republic)

Abstract

The response of four winter wheat cultivars, differing in resistance to Fusarium head blight (FHB), to spray inoculation with four selected Fusarium graminearum isolates, mixture of these isolates and frequently used F. culmorum isolate B was studied in five field and glasshouse experiments during 2008-2010. Analyses of variance showed highly significant main and interaction effects of cultivar, inoculum source and environment (year-trial) on all five examined traits indicative of disease severity, yield loss and accumulation of mycotoxins. The relations between traits were not evidently influenced by the used isolate. Resistance of host genotypes and environmental conditions accounted for a greater proportion of the total variation (8-36%) than the inoculation source (isolate) that substantially influenced the accumulation of the mycotoxin deoxynivalenol (12%), but expressed relatively low effects on symptom scores, percentage of fusarium damaged kernels and reductions of yield components (2-4%). Two-way and three-way interactions accounted for 25-40% of variation in the examined traits, which indicates great importance of multi-environment tests, using different Fusarium isolates for inoculation. Separate inoculation with F. graminearum isolates, differing in aggressiveness, did not appear to be more advantageous than their use in mixture that showed medium or below-average aggressiveness in all traits. The application of an isolate mixture could be recommended as a "less costly" alternative to inoculation with single isolates in trials repeated in different years and/or locations. It was indicated by these experiments that especially the detection of resistance/moderate resistance to FHB could be facilitated by the use of a carefully selected mixture of isolates. However, the application of aggressive isolates (isolate B of F. culmorum in these experiments) appeared to be beneficial to eliminate FHB susceptible materials in the breeding process.

Suggested Citation

  • Václav ŠÍP & Jana CHRPOVÁ & Lenka ŠTOČKOVÁ, 2011. "Evaluation of resistance to Fusarium head blight in wheat using different sources of inoculum," Czech Journal of Genetics and Plant Breeding, Czech Academy of Agricultural Sciences, vol. 47(4), pages 131-139.
    • Handle: RePEc:caa:jnlcjg:v:47:y:2011:i:4:id:112-2011-cjgpb
    DOI: 10.17221/112/2011-CJGPB
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    References listed on IDEAS

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    1. Jana Chrpová & Václav Šíp & Lenka Štočková & Zbyněk Milec & Ludmila Bobková, 2010. "Resistance of winter wheat varieties registered in the Czech Republic to Fusarium head blight in relation to the presence of specific Rht Alleles," Czech Journal of Genetics and Plant Breeding, Czech Academy of Agricultural Sciences, vol. 46(3), pages 122-134.
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    1. J. Chrpová & V. Šíp & T. Sedláček & L. Štočková & O. Veškrna & P. Horčička, 2011. "Effectiveness of marker-based selection for Fusarium head blight resistance in spring wheat," Czech Journal of Genetics and Plant Breeding, Czech Academy of Agricultural Sciences, vol. 47(SpecialIs), pages 123-129.

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