Effect of level of dietary energy on selection for postweaning gain in beef cattle
Bailey, D.R.C.; Lawson, J.E.; Coulter, G.H.; Entz, T.
Proceedings 3rd World Congress on Sheep and Beef Cattle Breeding 19-23 June 1988, Paris 2: 337-340
Since 1963, 2 Hereford and 2 Aberdeen-Angus (AA) lines have been selected for 168-day postweaning weight gain on a high-energy or medium-energy diet fed ad lib. In 1984-87, calves from each line were randomly assigned to high- and medium-energy diets. Postweaning gain was 38% higher for AA and Hereford calves fed the high-energy diet than for those fed the medium-energy diet (P<0.01).