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Examining Phenotypic Traits Contributing to the Spread in Northern European Potato Crops of EU_41_A2, a New Clonal Lineage of Phytophthora infestans

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  • Britt Puidet, Estonian University of Life Sciences, Estonia
  • Roman Mabon, INRAE, France
  • Michele Guibert, INRAE, France
  • Riinu Kiiker, Estonian University of Life Sciences, Estonian Crop Research Institute Jõgeva Estonia, Estonia
  • Liina Soonvald, Estonian University of Life Sciences, Estonia
  • Vinh Hong Le, Norwegian Institute of Bioeconomy Research, Norway
  • Håvard Eikemo, Norwegian Institute of Bioeconomy Research, Norway
  • Pauline Dewaegeneire, Sipre and FN3PT-inov3PT, France
  • Guillaume Saubeau, Florimond Desprez Veuve & Fils, France
  • Catherine Chatot, Germicopa Breeding, Florimond Desprez Veuve & Fils, France
  • Frédérique Aurousseau, Sipre and FN3PT-inov3PT, France
  • David E.L. Cooke, The James Hutton Institute, United Kingdom
  • Alison Lees, The James Hutton Institute, France
  • Isaac Kwesi Abuley
  • Jens Grønbech Hansen
  • Roselyne Corbiere, INRAE, France
  • Melen Leclerc, INRAE, France
  • Didier Andrivon, INRA, France
Until recently, genotypes of Phytophthora infestans were regionally distributed in Europe, with populations in western Europe being dominated by clonal lineages and those in northern Europe being genetically diverse due to frequent sexual reproduction. However, since 2013, a new clonal lineage (EU_41_A2) has successfully established itself and expanded in the sexually recombining P. infestans populations of northern Europe. The objective of this study was to study phenotypic traits of the new clonal lineage of P. infestans, which may explain its successful establishment and expansion within sexually recombining populations. Fungicide sensitivity, aggressiveness and virulence profiles of isolates of EU_41_A2 were analyzed and compared to those of the local sexual populations from Denmark, Norway, and Estonia. None of the phenotypic data obtained from the isolates collected from Denmark, Estonia and Norway independently explained the invasive success of EU_41_A2 within sexual Nordic populations. Therefore, we hypothesize that the expansion of this new genotype could result from a combination of fitness traits and more favorable environmental conditions that have emerged due to climate change.
Original languageEnglish
Pages (from-to)414-421
Number of pages8
Publication statusPublished - Feb 2022

    Research areas

  • clonal lineage, fungal pathogens, late blight, oomycetes, phenotype, sexual reproduction, Solanum tuberosum

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