Preliminary results for final weight and carcass and meat characteristics of steers in the first three of five calf crops to be produced cycle IV of the Germ Plasm Evaluation Program at the Roman L. Hruska U. S. Meat Animal Research Center are summarized. Progeny of a current sample of Hereford and Angus sires (sires born 1982-84) are significantly heavier than those of an original sample of Hereford and Angus sires (sires born 1968-70), but carcass composition and marbling has not changed significantly during this time period. Breeds differ significantly in growth, carcass composition, marbling, juiciness and tenderness. Breeds that excelled in marbling and percentage grading choice had the lowest percentage retail product. Breed differences and rankings in marbling were not reflective of breed differences and rankings in tenderness.

L. V Cundiff, R. M Koch, K. E Gregory, J. D Crouse, M. E Dikeman

Proceedings of the World Congress on Genetics Applied to Livestock Production, Volume XV. Beef cattle, sheep and pig genetics and breeding, fibre, fur and meat quality., , 291–294, 1990
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