Adaptation of V. inaequalis to quantitative and qualitative resistance factors of apple.

We will evaluate the impact of breakdown of a major resistance gene on the fitness of the virulent isolates (cost of virulence and restoration of fitness), and we will analyse the modalities of adaptation to QTL (general aggressiveness versus specific aggressiveness). In collaboration with the team RESPOM, we will evaluate the impact of selection pressure by major resistance gene or QTL on the genetic structure of V. inaequalis populations and we will define if there is a link between the durability of resistances and the genetic structure of the V. inaequalis populations. These data will be valuable for construction and spatial deployment strategies of resistant genotypes.

 Collab: RESPOM