33 daughter colonies of the 4a were tested:
CH-51-108-3589-1991 CH-51-108-3593-1991 CH-51-108-4091-1992 CH-51-108-4092-1992 CH-51-108-4093-1992 CH-51-108-4094-1992 CH-51-108-4095-1992 CH-51-108-4096-1992 CH-51-108-4097-1992 CH-51-108-4098-1992 CH-51-108-4099-1992 CH-51-108-4100-1992 CH-51-108-4101-1992 CH-51-108-4102-1992 CH-51-108-4103-1992 CH-51-108-4104-1992 CH-51-108-4105-1992 CH-51-108-4106-1992 CH-51-108-4107-1992 CH-51-108-4108-1992 CH-51-108-4109-1992 CH-51-108-4110-1992 CH-51-108-4111-1992 CH-51-108-4112-1992 CH-51-108-4113-1992 CH-51-108-4114-1992 CH-51-108-4115-1992 CH-51-108-4116-1992 CH-51-108-4747-1992 CH-51-108-4748-1992 CH-51-108-4749-1992 CH-51-108-4750-1992 CH-51-108-4896-1992
19 tested queens were mated at the mating station:
CH-51-4-5327-1994 CH-51-15-4901-1994 CH-51-15-4902-1994 CH-51-108-4887-1994 CH-51-108-4888-1994 CH-51-108-4889-1994 CH-51-108-4890-1994 CH-51-108-4891-1994 CH-51-108-4892-1994 CH-51-108-4894-1994 CH-51-108-4895-1994 CH-51-108-5322-1994 CH-51-130-4926-1994 CH-51-130-4929-1994 CH-51-131-5258-1994 CH-51-137-5148-1994 CH-51-137-5149-1994 CH-51-137-5179-1994 CH-51-137-5180-1994
17 daughter colonies of queens mated at the mating station were tested:
CH-51-4-6189-1996 CH-51-4-6466-1998 CH-51-4-6467-1998 CH-51-108-5642-1995 CH-51-108-5793-1996 CH-51-108-5794-1995 CH-51-108-6322-1997 CH-51-108-6323-1997 CH-51-134-6033-1997 CH-51-137-5746-1997 CH-51-137-6038-1997 CH-51-137-6396-1998 CH-51-137-6397-1998 CH-51-137-6398-1998 CH-51-137-6399-1998 CH-51-137-6400-1998 CH-51-209-6366-1998