2011/01/01 by Philippe Castagnone‐Sereno, Castagnone-Sereno, Philippe, Caroline Djian‐Caporalino +1
Agricultural and Biological Sciences · #Durabilité #Gestion #Meloidogyne spp #Nematode management and characterization studies #Nématodes à galles #Piment #Résistance #Sélection #Tomate
paper · doi:10.17180/3bg2-ak23
openalex publication_date 2011/01/01 · openalex created_date 2023/01/31 · openalex updated_date 2026/07/15
Due to the recent withdrawal of most chemical nematicides, host plant resistance is currently considered as the most efficient, environmentally safe and financially viable method to control plantparasitic nematodes. Major genes have been identified in solanaceous crops (e.g., Mi and Me genes in tomato and pepper, respectively), that confer resistance against the main root-knot nematode species (i.e., Meloidogyne arenaria, M. incognita and M. javanica). However, the occurrence of « resistancebreaking» (i.e., virulent) Meloidogyne populations able to overcome the resistance could significantly reduce the commercial exploitation of resistant cultivars. In this context, research conducted at INRA has dealt with several complementary aspects of the durability of tomato and pepper resistance against root-knot nematodes: (1) evaluating the ability of the nematodes to overcome tomato and pepper genotypes bearing various resistance genes that exhibit different resistance mechanisms, and analysing the specificity of the plant-nematode interaction; (2) studying the impact of the selection pressure of different resistance genes, introgressed in genotypes with susceptible or partially resistant backgrounds, on rooot-knot nematode populations; (3) comparing the reproductive potential of avirulent versus virulent nematodes, in order to identify a possible fitness cost associated with virulence. The obtained results provide a more comprehensive understanding of the ability of root-knot nematodes to overcome resistance genes from solanaceous crops, and allow the assessment of the consequences of the use of these genes on the reproductive fitness of the nematodes. Finally, these data should have direct application for both crop selection and crop management strategies to implement in order to improve the durability of resistance in the field.