A high level of HYG: 80% aperture of the damaged brood in 6/8H is the first signal that a line has varroa resistance characters.
We also test the ability to react to a high load of viruses, considering the immunoreaction of the colony and the immune system of the single bee as factors of primary importance.
To isolate varroa resistance characters faster and speed up selective pressure in our lines we use instrumental insemination with a single fuco in the spring and test the ability to handle a high varroa load with at least one artificial infection.
In summer the best specimens are used as female lines in our isolated fertilization stations, respecting the nature of additive and recessive transmissibility of all the characters that contribute to varroa resistance.
For this reason, in our selection program, the choice of male lines, plays a major role.