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Genetic and Environmental Relationships among Economic Characters in Beef Cattle. II. Correlations between Offspring and Dam and Offspring and Sire^{1, 2}

U. S. Department of Agriculture

Abstract

Records on 4234 dam-offspring pairs and on 85 sire-offspring groups were used in estimating the correlations among characters and the correlations between parent and offspring for various economic traits in beef cattle. Heritability estimates calculated from the regression of offspring on dam and progeny average on sire were .44 and .35 for birth weight, .11 and .25 for weaning weight, .07 and .17 for gain from birth to weaning, .16 and .15 for weaning score, .43 (offspring-dam) for fall yearling weight, .18 for gain from weaning to fall yearling age, and .14 for fall yearling score.

¹ Contribution from the Western Regional Project W-1, "The Improvement of Beef Cattle Through Breeding Methods."

² Acknowledgement is made to Superintendent J. R. Quesenberry, U. S. Range Livestock Experiment Station, Miles City, Montana, under whose supervision the data for this study were collected in cooperation with the Montana Agricultural Experiment Station, and to the Nebraska Agricultural Experiment Station for providing staff time.

³ Department of Animal Husbandry, University of Nebraska, Lincoln.