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Further identification of races of Cladosporium fulvum (Fulvia fulva) on tomato originating from the Netherlands France and Poland

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Abstract

Races ofCladosporium fulvum, which can overcome the resistance of the genes Cf2, Cf4, Cf5, Cf8, Cf9 and Cf11 have appeared in the Netherlands, France and Poland. Known isolates from the Netherlands and France and three new isolates from Poland have been investigated for the presence of virulence genes using a set of genotypes carrying resistance genes Cf2 to Cf11.Several Dutch isolates of races, earlier designated as 2.4, 2.4.5 and 2.4.5.9, were found to break down the resistance gene Cf11. These races must therefore be designated as 2.4.11, 2.4.5.11 and 2.4.5.9.11 respectively. In the new Polish isolates virulence genes, overcoming the resistance genes Cf2, Cf4, Cf8, Cf9 and Cf11 were found. Since all races able to grow on genotypes with Cf4, could also grow on genotypes carrying Cf8, it was impossible to discriminate between the genes Cf4 and Cf8. These Polish isolates were designated as races 4.11, 2.4.11 and 2.4.9.11. The consequences of the occurrence of these races for tomato breeding are discussed.

Samenvatting

Fysio's vanCladosporium fulvum, die de resistentie-genen Cf2, Cf4, Cf5, Cf8, Cf9 en Cf11 kunnen doorbreken, zijn in Nederland, Frankrijk en Polen opgetreden. Met behulp van een groep genotypen, die de resistentie genen Cf2 tot en met Cf11 dragen, zijn Nederlandse, Franse en enkele nieuwe Poolse isolaten onderzocht op de aanwezigheid van virulentiegenen. Enkele Nederlandse isolaten, eerder aangeduid met 2.4, 2.4.5. en 2.4.5.9, bleken het resistentie-gen Cf11 te kunnen doorbreken. Deze moeten daarom aangeduid worden als respectievelijk 2.4.11, 2.4.5.11 en 2.4.5.9.11. In de nieuwe Poolse isolaten werd virulentie gevonden voor Cf2, Cf4, Cf8, Cf9 en Cf11. Alle fysio's die op genotypen met Cf4 konden groeien, groeiden ook op genotypen met Cf8. Daarom kon geen ondersheid gemaakt worden tussen Cf4 en Cf8. De Poolse isolaten behoren tot de fysio's 4.11, 2.4.11 en 2.4.9.11. De gevolgen van het voorkomen van deze fysio's voor de tomateveredeling worden besproken.

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Authors and Affiliations

  1. Institute for Horticultural Plant Breeding (IVT), P.O. Box 16, 6700 AA, Wageningen, The Netherlands

    Pim Lindhout

  2. Station for Horticultural Plant Breeding (SHRO), ul. Zbicka 32, 32-065, Krzeszowice, Poland

    Wanda Korta & Margonata Cislik

  3. Research Institute for Plant Protection (IPO), P.O. Box 9060, 6700 GW, Wageningen, the Netherlands

    Ingrid Vos & Thijs Gerlagh

Authors
  1. Pim Lindhout
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  2. Wanda Korta
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  3. Margonata Cislik
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  4. Ingrid Vos
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  5. Thijs Gerlagh
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Lindhout, P., Korta, W., Cislik, M. et al. Further identification of races of Cladosporium fulvum (Fulvia fulva) on tomato originating from the Netherlands France and Poland. Netherlands Journal of Plant Pathology 95, 143–148 (1989). https://doi.org/10.1007/BF01999969

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  • DOI: https://doi.org/10.1007/BF01999969

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