9 daughter colonies of the 4a were tested:
CH-51-6-1948-1985 CH-51-6-2043-1985 CH-51-6-2044-1985 CH-51-6-2380-1985 CH-51-6-2381-1985 CH-51-6-2382-1985 CH-51-6-2383-1986 CH-51-6-2384-1986 CH-51-132-2757-1986
1 tested queens were mated at the mating station:
CH-51-6-3534-1987
4 daughter colonies of queens mated at the mating station were tested:
CH-51-6-3707-1990 CH-51-6-3708-1990 CH-51-6-3709-1990 CH-51-6-4239-1990