7 daughter colonies of the 4a were tested:
CH-51-1-1301-1980 CH-51-1-1302-1980 CH-51-4-1125-1980 CH-51-4-1126-1980 CH-51-7-1193-1980 CH-51-9-1213-1979 CH-51-160-1335-1978
11 tested queens were mated at the mating station:
CH-51-2-1253-1981 CH-51-3-1136-1981 CH-51-3-1254-1981 CH-51-4-1199-1981 CH-51-4-1200-1981 CH-51-4-1314-1981 CH-51-5-1468-1981 CH-51-5-1469-1981 CH-51-5-1470-1981 CH-51-5-1585-1981 CH-51-5-1586-1981
5 daughter colonies of queens mated at the mating station were tested:
CH-51-5-1733-1984 CH-51-5-1734-1984 CH-51-5-1735-1984 CH-51-5-1998-1985 CH-51-5-2008-1984