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Population genetic structure of Mycosphaerella graminicola and Quinone Outside Inhibitor (QoI) resistance in the Czech Republic

Drabešová, Jana ; Ryšánek, Pavel ; Brunner, Patrick ; McDonald, Bruce ; Croll, Daniel

In: European Journal of Plant Pathology, 2013, vol. 135, no. 1, p. 211-224

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    Titre
    • Population genetic structure of Mycosphaerella graminicola and Quinone Outside Inhibitor (QoI) resistance in the Czech Republic
    Auteur
    • Drabešová, Jana. Department of Plant Protection, CULS Prague, 165 21, Prague, Czech Republic
    • Ryšánek, Pavel. Department of Plant Protection, CULS Prague, 165 21, Prague, Czech Republic
    • Brunner, Patrick. Institute of Integrative Biology, ETH Zurich, 8092, Zurich, Switzerland
    • McDonald, Bruce. Institute of Integrative Biology, ETH Zurich, 8092, Zurich, Switzerland
    • Croll, Daniel. Institute of Integrative Biology, ETH Zurich, 8092, Zurich, Switzerland
    Type de document
    • Postprint
    Langue
    • Anglais
    Publié dans
    • European Journal of Plant Pathology, 2013, vol. 135, no. 1, p. 211-224. Springer Netherlands
    Autre version électronique
    Identifiant OAI-PMH
    • oai:doc.rero.ch:315109
    Summary
    Damage caused by the wheat pathogen Mycosphaerella graminicola increased rapidly during the last two decades in the Czech Republic. We collected isolates from naturally infected fields in seven wheat-growing locations and analysed these using eight microsatellite markers. All markers were highly polymorphic. We found a high degree of genetic diversity and low clonality within all sampled Czech populations. We identified 158 unique multilocus haplotypes among 184 isolates. Field populations showed weak genetic structure but we detected more differentiation between climatic regions within the Czech Republic. We compared the Czech field populations to populations from the United Kingdom, Germany and Switzerland and found a marked differentiation between Czech populations and Western European populations. We hypothesize that decades of different agricultural practices, including the use of different wheat cultivars, may explain this genetic differentiation. We detected a rapid increase in QoI fungicide resistance during the sampling period from 2005 to 2011, coinciding with the widespread application of this class of fungicides in the Czech Republic. M. graminicola populations in the Czech Republic underwent a rapid adaptive evolution from sensitivity to resistance similar to what was described earlier in Western Europe