15 daughter colonies of the 4a were tested:
CH-51-206-2-2016 CH-51-206-3-2017 CH-51-206-6-2016 CH-51-206-25-2016 CH-51-206-30-2017 CH-51-206-31-2017 CH-51-206-32-2016 CH-51-206-32-2017 CH-51-206-44-2017 CH-51-206-45-2017 CH-51-208-8-2017 CH-51-208-40-2017 CH-51-208-65-2017 CH-51-208-161-2017 CH-51-214-9-2017
6 tested queens were mated at the mating station:
CH-51-206-24-2018 CH-51-212-2-2018 CH-51-212-5-2018 CH-51-212-14-2018 CH-51-214-17-2018 CH-51-214-99-2018
No daughter colonies from colonies mated at the station were tested yet.