Comparison of Broiler Performance When Fed Diets Containing Grain from YieldGard (MON810), YieldGard × Roundup Ready (GA21), Nontransgenic Control, or Commercial Corn1

ABSTRACT This 42-day experiment was undertaken to compare the nutritional value of insect-protected corn event MON810 (YieldGard) and YieldGard × herbicide-tolerant corn event GA21 (Roundup Ready) to their non-transgenic controls as well as four different commercial reference corns, when fed to growing Cobb × Cobb broil-ers. A randomized complete block design was used, and each treatment was replicated with five pens of males and five pens of females with 10 broilers per pen. Broilers were fed approximately 55 % wt/wt corn during the first 20 d and approximately 60 % wt/wt corn thereafter. The corn component of diets fed to broilers was supplied entirely with grain from the eight hybrids included in the experiment. Final live weights averaged 2.09 kg/bird fed YieldGard corn and 2.15 kg/bird fed YieldGard × (Key words: broiler performance, carcass yield, Bacillus thuringiensis, Cry1A(b), maize 5-enolpyruvylshikimate-3-phosphate synthase