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Results from Crossing Beef X Beef and Beef X Dairy Breeds: Postweaning Performance of Heifers¹

U. S. Department of Agriculture and Montana Agricultural Experiment Station, Miles City 59301

Abstract

Experimental results from crossing breeds for beef production are continually requested by the beef cattle industry. Information on crossbreeding experiments conducted under Western range conditions, and involving the Charolais and Brown Swiss breeds, is limited. This is indicated by comprehensive reviews and other reports covering results available or research in progress (Turton, 1964; Temple, 1965; Mason, 1966; Warwick, 1968; Cundiff, 1970).

This paper covers postweaning results obtained on heifer progeny in an experiment designed to evaluate heterosis and other effects from crossing breeds under conditions associated with production of Western range cattle. Results from birth to weaning were presented by Pahnish et al. (1969). The experiment included production of straightbred Hereford, Angus and Charolais and the six reciprocal crosses among these breeds. As an adjunct to the main study, beef x Brown Swiss crosses were obtained by mating bulls of the three beef breeds with Brown Swiss cows. Estimates of crossbreeding effects on 190-day weaning weight, 361-day (12-month) weight, 547-day (18-month) weight, rate of gain from 190 to 361 days, rate of gain from 361 to 547 days, rate of gain from 190 to 547 days and 547-day score are reported.

¹ This study was conducted at the U. S. Range Livestock Experiment Station, Miles City, Montana, as a contribution to Western Regional Project W-1, The Improvement of Beef Cattle Through the Application of Breeding Methods, in cooperation with the Montana Agricultural Experiment Station, Bozeman. Publication has been approved by the Director of the Montana Agricultural Experiment Station as Journal Series No. 235.

² U. S. Range Livestock Experiment Station, A.R.S., Miles City, Montana.

³ Animal Science Research Division, A.R.S., Fort Collins, Colorado.

⁴ Colorado Experiment Station, Fort Collins.

⁵ Montana Agricultural Experiment Station, Bozeman.