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Descripción
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| Viruses are an important group of plant pathogens, second only to fungi for the number of diseases they cause and for their economic impact. In addition, viruses are the major group of emergent pathogens of crops. The only direct, and the most efficient, way to control viral diseases in crops is the use of genetic resistance. The use of resistance is a preferred method for the control of plant pathogens, as it is highly efficient, target-specific and environmental-friendly. These important advantages of resistance are countered by the ability of pathogens to evolve and overcome the protection conferred by resistance factors after their extensive development in crop cultivars. Hence, much effort has been devoted to understand the evolution of virulence in plant viruses, and of defences in host plants, as related to the success and durability of this control strategy. A part of this effort has resulted in a wealth of theoretical studies on plant-pathogen co-evolution under different ecological and genetic scenarios. However, the abundance of theoretical studies has not been followed by a similar amount of experimental analyses. This is particularly the case for plant viruses. Viruses differ from cellular plant pathogens by their higher mutation rates, on one hand, but also by encoding few multifunctional proteins in their small genomes, in which epistasis is important, and these traits of their genetic architecture may condition their evolutionary potential. Hence, work done with cellular plant pathogens is difficult to extrapolate to viruses, and plant-virus co-evolution remains largely underexplored. Indeed, it has been proposed that virus infection would have little or no impact on wild plant populations, and that the high virulence of viruses in crops is the result of ecological changes associated to agriculture. If this were the case, plants would not develop defences against virus infection, and plants and viruses would not co-evolve. | |
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Internacional
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Si |
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ISSN o ISBN
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00-0000-00 |
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Entidad relacionada
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Nacionalidad Entidad
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COREA DEL SUR |
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Lugar del congreso
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Sunchon National University |