Two-step and random regression analyses of weight gain of station-tested beef bulls.

@article{Schenkel2002TwostepAR,
  title={Two-step and random regression analyses of weight gain of station-tested beef bulls.},
  author={Flavio S. Schenkel and Stephen P. F. Miller and Janusz Jamrozik and J. W. Wilton},
  journal={Journal of animal science},
  year={2002},
  volume={80 6},
  pages={1497-507}
}
Our objectives were to compare a two-step model and a joint procedure via random regression model for evaluating weight gain of beef bulls, weighed every 28 d on 140-d test, and to estimate genetic, environmental, and phenotypic parameters. Two-step analysis consisted of fitting fixed linear regressions to weights of each bull to determine weight gain on test. In the second step, gain on test was analyzed by a mixed model that included fixed effects of breed, test group, and starting age and… CONTINUE READING

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