Estimation of Genetic and Phenotypic Parameters of Weaning Traits in Beef Cattle1
- 31 January 1965
- journal article
- research article
- Published by Oxford University Press (OUP) in Journal of Animal Science
- Vol. 24 (1), 182-187
- https://doi.org/10.2527/jas1965.241182x
Abstract
The genetic and phenotypic parameters of average daily gain from birth to weaning (ADG) and type score at weaning (TS) have been evaluated from 4,838 records on beef cattle in New York. The records were drawn from 39 herds with 121 sires of the Angus breed and from 16 herds with 55 sires of the Hereford breed for the years 1949 to 1960 inclusive. The data were tested for the presence of interaction effects. Estimates were obtained by an iterative procedure of the effects of sex, age-of-dam and year differences on the two traits. The records were adjusted for these fixed effects and components of variance and covariance were estimated for herds, sires, herds by years, and error. These components were used to compute estimates of the heritability of each trait and of the genetic, phenotypic and environmental correlations between them. Copyright © 1965. American Society of Animal Science . Copyright 1965 by American Society of Animal ScienceThis publication has 7 references indexed in Scilit:
- Repeatability of Weaning Traits in Beef Cattle1Journal of Animal Science, 1965
- Genetic and Environmental Influences on Gain of Beef Cattle during Various Periods of LifeJournal of Animal Science, 1961
- Selection Indexes for Weanling Traits in Beef Calves1Journal of Animal Science, 1961
- The Estimation of Environmental and Genetic Trends from Records Subject to CullingBiometrics, 1959
- Fifty Years of Progress in Breeding Beef CattleJournal of Animal Science, 1958
- Estimation of Variance and Covariance ComponentsBiometrics, 1953
- Changes in Milk Production with Age and Milking FrequencyJournal of Dairy Science, 1950