5 daughter colonies of the 4a were tested:
DE-2-145-1790-2003 DE-2-145-1791-2003 DE-2-145-1792-2003 DE-2-145-1793-2003 DE-2-145-1794-2003
6 tested queens were mated at the mating station:
DE-2-145-2138-2007 DE-2-145-2142-2007 DE-2-145-2150-2007 DE-2-145-2183-2007 DE-2-145-2186-2007 DE-2-145-2191-2007
3 daughter colonies of queens mated at the mating station were tested:
DE-2-145-2631-2008 DE-2-145-2632-2008 DE-2-145-2633-2008