Performance of broiler chickens fed event DAS-40278-9 maize containing the aryloxyalkanoate dioxygenase-1 protein

► Event DAS-40278-9 corn contains a transgenic trait conferring tolerance to 2,4-D and aryloxyphenoxypropionate herbicides. ► Grain from DAS-40278-9 contains the AAD-1 enzyme from the soil bacterium Sphingobium herbicidovorans. ► Grain from DAS-40278-9 and a near-isogenic line resulted in similar performance when fed to broiler chickens for 6 weeks.