13 daughter colonies of the 4a were tested:
CH-51-206-1-2016 CH-51-206-2-2017 CH-51-206-4-2016 CH-51-206-8-2016 CH-51-206-11-2016 CH-51-206-14-2016 CH-51-206-35-2016 CH-51-206-36-2016 CH-51-206-37-2016 CH-51-206-42-2017 CH-51-206-46-2016 CH-51-208-84-2017 CH-51-208-89-2017
8 tested queens were mated at the mating station:
CH-51-206-30-2017 CH-51-206-31-2017 CH-51-206-32-2017 CH-51-212-9-2017 CH-51-212-11-2017 CH-51-214-1-2017 CH-51-214-2-2017 CH-51-214-6-2017
5 daughter colonies of queens mated at the mating station were tested:
CH-51-206-54-2018 CH-51-216-35-2019 CH-51-216-71-2019 CH-51-216-85-2019 CH-51-216-94-2019