Stability of partial resistance in potato cultivars exposed to aggressive strains of Phytophthora infestans

W.G. Flier, G.B.M. van den Bosch, L.J. Turkensteen

    Research output: Contribution to journalArticleAcademicpeer-review

    44 Citations (Scopus)

    Abstract

    Potato cultivars were evaluated for their resistance responses to aggressive strains of Phytophthora infestans in field and laboratory experiments. Analysis of variance revealed differential cultivar-by-isolate interactions for both foliar and tuber blight resistance. Differential responses occur as revealed by specific susceptibilities of cultivars to certain pathogen genotypes and changing rank order. In general, severity of late blight epidemics as observed in the haulms did not correlate well with foliar blight resistance ratings as presented in the National List of Recommended Potato Varieties. No significant correlation was found between tuber blight incidence under field conditions and the tuber blight rating in the National List. Also, there was no relation between the field and laboratory tuber blight resistance assessments. A significant association was demonstrated between late blight infection in the foliage and tuber blight incidence under field conditions. The presence of differential interaction, independent of R-gene-based resistance, indicates some adaptation of P. infestans to partial resistance and consequently adverse effects on the stability and durability of partial resistance to potato late blight
    Original languageEnglish
    Pages (from-to)326-337
    JournalPlant Pathology
    Volume52
    Issue number3
    DOIs
    Publication statusPublished - 2003

    Keywords

    • late blight
    • differential interaction
    • durable resistance
    • field-resistance
    • tuber rot
    • r-genes
    • netherlands
    • populations
    • host
    • diversity

    Fingerprint Dive into the research topics of 'Stability of partial resistance in potato cultivars exposed to aggressive strains of Phytophthora infestans'. Together they form a unique fingerprint.

    Cite this