No daughter colonies of the 4a were tested yet.
4 tested queens were mated at the mating station:
DE-1-7-8-2014 DE-1-7-12-2014 DE-1-7-13-2014 DE-1-7-15-2014
4 daughter colonies of queens mated at the mating station were tested:
DE-1-7-19-2016 DE-1-7-20-2016 DE-1-7-23-2016 DE-1-7-25-2016