9 daughter colonies of the 4a were tested:
DE-15-17-51-2008 DE-15-17-52-2008 DE-15-17-54-2008 DE-15-17-55-2008 DE-15-17-56-2008 DE-15-17-57-2008 DE-15-17-59-2008 DE-15-17-61-2008 DE-15-17-63-2008
18 tested queens were mated at the mating station:
DE-8-1-6349-2011 DE-8-1-6352-2011 DE-15-17-4-2011 DE-15-17-5-2011 DE-15-17-7-2011 DE-15-17-9-2011 DE-15-17-13-2011 DE-15-17-16-2011 DE-15-17-17-2011 DE-15-17-18-2011 DE-15-17-19-2011 DE-15-17-21-2011 DE-15-17-22-2011 DE-15-17-30-2011 DE-15-64-1-2011 DE-15-64-2-2011 DE-15-64-3-2011 NL-55-12-8-2011
7 daughter colonies of queens mated at the mating station were tested:
DE-15-64-1-2012 DE-15-64-1-2013 DE-15-64-2-2012 DE-15-64-2-2013 DE-15-64-3-2012 DE-15-64-4-2012 NL-55-12-12-2012