Cubic

Modeling of crossbred cattle growth, comparison between cubic and piecewise random regression models

H. R. Mirzaei, Pitchford, W. S., and Verbyla, A. P., Modeling of crossbred cattle growth, comparison between cubic and piecewise random regression models, vol. 10, pp. 2230-2244, 2011.

Two analyses, cubic and piecewise random regression, were conducted to model growth of crossbred cattle from birth to about two years of age, investigating the ability of a piecewise procedure to fit growth traits without the complications of the cubic model. During a four-year period (1994-1997) of the Australian “Southern Crossbreeding Project”, mature Hereford cows (N = 581) were mated to 97 sires of Angus, Belgian Blue, Hereford, Jersey, Limousin, South Devon, and Wagyu breeds, resulting in 1141 steers and heifers born over four years.

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