Growth functions have been used extensively to represent changes in size with age, so that the genetic potential of animal for growth can be evaluated and nutrition matched to possible growth. In models of animal production systems, growth curves are used to provide estimates of daily feed requirements for growth. Sire selection is the fine-tuning mechanism for developing optimal breeding programs (Brinks and Winder, 1996) associated with the broad distribution of sires of high genetic merit. Since the early production of semen by a bull depends on the growth of the animal, Salisbury et al., (1976) published that growth of the A.I. sires fit best a Gompertz curve. Gompertz and Richards functions have been compared (Lopez et al., 2000) with a generalized Michelis-Menten equation for the analysis of growth of fish and several farm and laboratory animals.  The objective of this study was to characterize the growth curve of dual-purpose calves in the tropics of México.

H. Castillo-Rojas, F. Juarez-Lagunes, J. Dominguez, O. G Castaneda, J. Fajardo, A. Avila, V. E Vega-Murillo

Proceedings of the World Congress on Genetics Applied to Livestock Production, Volume 2002. Session 11, , 11.42, 2002
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