Durable resistance to late blight (Phytophthora infestans) in old potato cultivars

  title={Durable resistance to late blight (Phytophthora infestans) in old potato cultivars},
  author={Leontine T. Colon and L. J. Turkensteen and Wim Prummel and Dirk J. Budding and J. Coosje Hoogendoorn},
  journal={European Journal of Plant Pathology},
Twenty-two R gene-free cultivars, introduced between 1900 and 1954, were field-tested for their level of partial resistance to a complex race ofPhytophthora infestans. Disease assessments, expressed as areas under the disease progress curve, appeared closely correlated to resistance ratings given between 1929 and 1954. This, and the stability in time since 1929 of the ratings in the Dutch Descriptive List of Varieties of Field Crops, suggest that the resistance concerned is durable. Lesion… CONTINUE READING