J. Anim Sci.
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J. Anim Sci. 1963. 22:914-918.
© 1963 American Society of Animal Science
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Comparisons of Inbred Lines and Linecrosses for Performance Traits in Hereford Range Cattle1

A. E. Flower2, J. S. Brinks3, J. J. Urick4 and F. S. Willson2

Montana Agricultural Experiment Station and U. S. Department of Agriculture

Abstract

Ten years of data on three inbred Hereford lines and their linecrosses resulting from matings on a common inbred tester line produced at the North Montana Branch Experiment Station, Havre, Montana, were used in the study. Various sources of variation affecting performance traits, including years, lines, age of dam, sex, and age of calf are evaluated and discussed. Comparisons of inbred lines with their linecrosses indicate that in general line performance for final weight is predictive of relative growth rates at various stages of development in the respective linecrosses. Comparisons between linecrosses and the mean of the parental lines show an average hybrid advantage of 0.1, 4.6, 4.3, and 4.7% for birth weight, weaning weight, postweaning daily gain, and final weight, respectively.

Footnotes

1 This study was conducted at the North Montana Branch Experiment Station, Havre, Montana, in cooperation with Western Regional Research Project W-l, The Improvement of Beef Cattle Through the Application of Breeding Methods. Published with approval of the Director of the Montana Agricultural Experiment Station, Journal Series No. 607.

2 Department of Animal Science and Range Management, Montana State College, Bozeman, Montana.

3 Beef Cattle Research Branch, Animal Husbandry Research Division, ARS. Denver, Colorado.

4 Present address: U. S. Range Livestock Experiment Station. Miles City, Montana; formerly with North Montana Branch Experiment Station.






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Copyright © 1963 by the American Society of Animal Science.