Combining selective pressures to enhance the durability of disease resistance genes
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en
Article de revue
Este ítem está publicado en
Frontiers in Plant Science. 2016, vol. 7, p. 1-8
Frontiers
Resumen en inglés
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 ...Leer más >
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.< Leer menos
Palabras clave
résistance aux maladies
gène de résistance
ravageur
agent pathogène
analyse comparative
méthode de lutte
pesticide
Palabras clave en inglés
durable disease plant resistance
strategy of resistance gene deployment
pyramids of plant resistance
gene stacking
mosaic of plant resistance
resistance breakdown
management of plant pathogens
fungicides
resistance to diseases
resistance gene
pest
pathogen
comparative analysis
weed control methods
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