Realization of a specific Varroa Tolerance (VT) index for the selection on the containment of the Varroa Destructor infestation rate, including it in the genetic evaluation mentioned in point 4, which includes the HB + VGR phenotypes. In this regard, we will also proceed to the development of effective field strategies for measuring the VGR phenotype on a large number of colonies, in line with what has already been done for the HB phenotype as part of the BEENOMIX Project (2016-2018). The validation of this aggregate HB + VGR index may also be based on VSH (Varroa Sensitive Hygiene) genes, thanks to the genetic information already available to the OG.