VALIÈRE , Sophie

The deployment of virus-resistant crops often leads to the emergence of resistance-breaking (RB) pathogens that suppress the yield benefit provided by the resistance (Fabre et al,2012). Although breakdowns are well known for qualitative resistances conferring total resistance to the virus, they are still poorly understood for quantitative...

Résumé présenté au congrès (texte en pièce jointe) Rousseau, E., Fabre, F., Mailleret, L., Palloix, A., Moury, B., Grognard, F. (2014). Adaptation of plant viruses to quantitative resistances

By combining high-throughput sequencing (HTS) with experimental evolution, we can observe the within-host dynamics of pathogen variants of biomedical or ecological interest. We studied the evolutionary dynamics of five variants of Potato virus Y (PVY) in 15 doubled-haploid lines of pepper. All plants were inoculated with the same mixture of...

Experimental evolution studies deserve considerable attention to the estimation of basic evolutionary forces such as selection and genetic drift. With the advent of high-throughput sequencing techniques, these studies gained a renewed attention. However the joint estimation of selection and genetic drift still remain challenging when no neutral...

Senescence determines plant organ lifespan depending on aging and environmental cues. During the endosymbiotic interaction with rhizobia, legume plants develop a specific organ, the root nodule, which houses nitrogen (N)-fixing bacteria. Unlike earlier processes of the legume-rhizobium interaction (nodule formation, N fixation), mechanisms...

Senescence determines plant organ lifespan depending on aging and environmental cues. During the endosymbiotic interaction with rhizobia, legume plants develop a specific organ, the root nodule, which houses nitrogen (N)-fixing bacteria. Unlike earlier processes of the legume-rhizobium interaction (nodule formation, N fixation), mechanisms...