10 daughter colonies of the 4a were tested:
CH-51-51-2234-1986 CH-51-51-2235-1986 CH-51-51-2236-1986 CH-51-51-2237-1986 CH-51-51-2238-1986 CH-51-51-2239-1986 CH-51-51-2240-1986 CH-51-51-2241-1986 CH-51-51-2242-1986 CH-51-51-2243-1986
21 tested queens were mated at the mating station:
CH-51-54-2861-1988 CH-51-54-2862-1988 CH-51-61-2729-1988 CH-51-61-2730-1988 CH-51-61-2740-1988 CH-51-62-2683-1988 CH-51-62-2684-1988 CH-51-62-2685-1988 CH-51-62-2686-1988 CH-51-62-2687-1988 CH-51-62-2688-1988 CH-51-62-2689-1988 CH-51-62-2690-1988 CH-51-62-2691-1988 CH-51-62-2692-1988 CH-51-62-2693-1988 CH-51-180-2876-1988 CH-51-182-2878-1988 CH-51-182-2879-1988 CH-51-182-2880-1988 CH-51-182-2969-1988
1 daughter colonies of queens mated at the mating station were tested:
CH-51-182-2966-1989