Kriese, L.A.Schalles, R.R.Lomas, Lyle W.2010-12-032010-12-032010-12-03http://hdl.handle.net/2097/6766Heterosis estimates were determined for gestation length, birth weight, and yearling weight using a two-breed rotational crossbreeding system with Angus and Simmental cattle. Heterosis for gestation length was -.3%; birth weight, 8.31%; weaning weight 5.05%, and yearling weight, 5.39%. Angus-sired calves from Simmental darns were significantly heavier at weaning and as yearlings than the reciprocal cross.BeefHeterosisGestation lengthBirth weightYearling weightConference paper