8 daughter colonies of the 4a were tested:
CH-50-133-10240-2018 CH-50-133-10255-2018 CH-50-133-10262-2018 CH-50-133-10264-2018 CH-50-133-10272-2018 CH-50-133-10276-2018 CH-50-133-10277-2018 CH-50-133-10280-2018
7 tested queens were mated at the mating station:
CH-50-125-42297-2019 CH-50-133-42152-2019 CH-50-133-42153-2019 CH-50-156-42640-2019 CH-50-156-42655-2019 CH-50-156-42656-2019 CH-50-156-42658-2019
6 daughter colonies of queens mated at the mating station were tested:
CH-50-133-42700-2020 CH-50-133-42701-2020 CH-50-133-42705-2020 CH-50-133-42706-2020 CH-50-133-42707-2020 CH-50-133-42846-2020