J. Anim Sci.
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J. Anim Sci. 1970. 31:1210-1214.
© 1970 American Society of Animal Science
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Prediction of Steer Performance from Initial Body Weight and Digestible Enery Intake1

J. W. VanStavern, D. G. Davenport, M. B. Wise and E. R. Barrick

North Carolina Agricultural Experiment Station, Raleigh

Abstract

MANY researchers make use of the possibility of alloting animals to treatments in accordance with some predictor of performance of these animals in the experiment (Henderson, 1959). Attempts have been made to find indicators or predictors of carcass traits in the live animal (Orme et al., 1960; Rollins et al., 1962). Allotment to experimental treatments based on predicted performance resulted in only slight improvement over allotment based solely on body weight. Growth rate and efficiency of feed utilization are reported to be moderately heritable and highly correlated (Lickley et al., 1960; Koch et al., 1963; Swiger et al., 1965). Heritability estimates for feed consumption have been reported as high as 98% (Swiger et al., 1962). This study was undertaken to investigate the value of voluntary energy intake as a predictor of feedlot performance and certain carcass characteristics in beef cattle.

Experimental Procedure

The performance data employed were obtained from 280 beef steers in 10 feeding trials in which predominately all-concentrate rations were individually fed. (Wise et al., 1961; Wise, Blumer and Barrick, 1963; Wise et al., 1965a, b; Harvey et al., 1968; Wise, Haskins and Barrick, 1967; Haskins, Wise and Barrick, 1967; Wise, Barrick and Haskins, 1969).

Footnotes

1 Paper No. 3066 of the Journal Series of the North Carolina State University Agricultural Experiment Station, Raleigh.






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