Performance of Two Lines of Hereford Cattle in Two Environments1

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Abstract
Two herds of Hereford cows, one originating at the U.S. Range Livestock Experiment Station, Miles City, Montana, and the other originating at the Brooksville Beef Cattle Research Station, Brooksville, Florida, were subdivided and half of each transferred to the opposite location. During the first 7 years (1962 through 1968) subsequent to the initial transfer, location-origin interactions were apparent in birth, weaning and yearling weights (P<.01) for both sexes. Performance to yearling ages favored Montana-originating cattle at the Montana location and cattle of Florida origin at the Florida location. Interactions were not apparent in traits of 5-year-old cows, with the exception of reproductive performance. Percent pregnant and percent weaned were lower for the cows of Montana origin located in Florida than for the other three location-origin subgroups, which were similar. Significant differences in most traits measured were observed between locations and between origin groups. Copyright © 1971. American Society of Animal Science . Copyright 1971 by American Society of Animal Science.

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