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Plantes et Système de cultures Horticoles

Plantes et Systèmes de culture Horticoles

Article paru dans la revue Frontiers in plant science

Article paru dans la revue Frontiers in plant science
Combining Selective Pressures to Enhance the Durability of Disease Resistance Genes

REX Consortium Members

Consortium members and affiliations : The REX (Resistance to Xenobiotics) Consortium consists of:

• Denis Bourguet (CBGP, INRA – Montpellier SupAgro, F-34988 Montferrier/Lez, France);

• François Delmotte (SAVE, INRA, F-33882, Villenave d’Ornon, France);

Pierre Franck (PSH, INRA, F-84914, Avignon, France);

• Thomas Guillemaud (ISA, INRA – Université Nice Sophia Antipolis – CNRS, F-06903, Sophia Antipolis, France);

• Xavier Reboud (Agroécologie, INRA – AgroSup Dijon – Université of Bourgogne Franche-Comté, F-21000 Dijon, France);

• Corinne Vacher (BIOGECO, INRA – Université de Bordeaux, F-33615, Cestas, France);

• Anne-Sophie Walker (BIOGER, INRA – AgroParisTech – Université de Paris-Saclay, F-78850, Thiverval-Grignon, France).

Mini Review ARTICLE

Front. Plant Sci., 23 December 2016 | https://doi.org/10.3389/fpls.2016.01916REX Consortium

The efficacy of disease resistance genes in plants decreases over time because of the selection of virulent pathogen genotypes. A key goal of crop protection programs is to increase the durability of the resistance conferred by these genes. The spatial and temporal deployment of plant disease resistance genes is considered to be a major factor determining their durability. In the literature, four principal strategies combining resistance genes over time and space have been considered to delay the evolution of virulent pathogen genotypes. We reviewed this literature with the aim of determining which deployment strategy results in the greatest durability of resistance genes. Although theoretical and empirical studies comparing deployment strategies of more than one resistance gene are very scarce, they suggest that the overall durability of disease resistance genes can be increased by combining their presence in the same plant (pyramiding). Retrospective analyses of field monitoring data also suggest that the pyramiding of disease resistance genes within a plant is the most durable strategy. By extension, we suggest that the combination of disease resistance genes with other practices for pathogen control (pesticides, farming practices) may be a relevant management strategy to slow down the evolution of virulent pathogen genotypes.Go back young man and gather up your weary and defeated genes of the past, take your currently successful genes, find some new ones if you can, and build yourself a genetic pyramid.