European Journal of Plant Pathology

, Volume 102, Issue 6, pp 585–590

Selection forMeloidogyne incognita virulence against resistance genes from tomato and pepper and specificity of the virulence/resistance determinants

  • P. Castagnone-Sereno
  • M. Bongiovanni
  • A. Palloix
  • A. Dalmasso
Research Articles
  • 91 Downloads

Abstract

Experiments were designed to analyze the relationships between the root-knot nematodeMeloidogyne incognita and resistant tomato and pepper genotypes. From a natural avirulent isolate, near-isogenic nematode lineages were selected with virulence either against the tomatoMi resistance gene or the pepperMe3 resistance gene. Despite the drastic selection pressure used, nematodes appeared unable to overcome the pepperMe1 gene, therefore suggesting some differences in the resistance conferred byMe1 andMe3 in this species. Nematodes virulent onMi-resistant tomatoes were not able to reproduce onMe1-resistant nor onMe3-resistant peppers, and nematodes virulent onMe3-resistant peppers were not able to reproduce onMi-resistant tomatoes nor onMe1-resistant peppers. These results clearly demonstrate the specificity ofM. incognita virulence against resistance genes from both tomato and pepper, and indirectly suggest that gene-for-gene relationships could occur between these two solanaceous crops and the nematode.

Key words

Capsicum annuum doubled haploid pepper lines Lycopersicon esculentum Meloidogyne incognita near-isogenic nematode lines root-knot nematode resistance genes virulence 

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Copyright information

© Kluwer Academic Publishers 1996

Authors and Affiliations

  • P. Castagnone-Sereno
    • 1
  • M. Bongiovanni
    • 1
  • A. Palloix
    • 2
  • A. Dalmasso
    • 1
  1. 1.Laboratoire de Biologie des InvertébrésINRAAntibes CedexFrance
  2. 2.Station d'Amélioration des Plantes MaraîchèresINRAMontfavet CedexFrance

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