Impact of genetic drift, selection and accumulation level on virus adaptation to its host plants
| Autor: | Ludovic Mailleret, Elsa Rousseau, Frédéric Fabre, Lucie Tamisier, Olivier Bouchez, Gregory Girardot, Marion Szadkowski, Catherine Zanchetta, Benoît Moury, Frédéric Grognard, Alain Palloix, Vincent Simon |
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| Rok vydání: | 2018 |
| Předmět: |
0106 biological sciences
0301 basic medicine 2. Zero hunger Genetics education.field_of_study biology Population food and beverages Soil Science Plant Science biology.organism_classification 01 natural sciences Virus 03 medical and health sciences 030104 developmental biology Genetic drift Potato virus Y Effective population size Plant virus Plant breeding Adaptation education Agronomy and Crop Science Molecular Biology 010606 plant biology & botany |
| Zdroj: | Molecular Plant Pathology. 19:2575-2589 |
| ISSN: | 1464-6722 |
| DOI: | 10.1111/mpp.12730 |
| Popis: | The efficiency of plant major resistance genes is limited by the emergence and spread of resistance-breaking mutants. Modulation of the evolutionary forces acting on pathogen populations constitutes a promising way to increase the durability of these genes. We studied the effect of four plant traits affecting these evolutionary forces on the rate of resistance breakdown (RB) by a virus. Two of these traits correspond to virus effective population sizes (Ne ) at either plant inoculation or during infection. The third trait corresponds to differential selection exerted by the plant on the virus population. Finally, the fourth trait corresponds to within-plant virus accumulation (VA). These traits were measured experimentally on Potato virus Y (PVY) inoculated to a set of 84 pepper doubled-haploid lines, all carrying the same pvr23 resistance gene, but having contrasting genetic backgrounds. The lines showed extensive variation for the rate of pvr23 RB by PVY and for the four other traits of interest. A generalized linear model showed that three of these four traits, with the exception of Ne at inoculation, and several pairwise interactions between them had significant effects on RB. RB increased with increasing values of Ne during plant infection or VA. The effect of differential selection was more complex because of a strong interaction with VA. When VA was high, RB increased as the differential selection increased. An opposite relationship between RB and differential selection was observed when VA was low. This study provides a framework to select plants with appropriate virus evolution-related traits to avoid or delay RB. |
| Databáze: | OpenAIRE |
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