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The aim of this work was to estimate the genetic parameters for growth traits and the tendency of their genetic values in a population of Bovine Creole cattle Sanmartinero, located in Meta, Colombia. Was used an animal model with direct and maternal effects as well as a permanent environmental effects and were analyzed birth weight, weaning weight, (adjusted at 240 d), weight at 16 months, weaning daily gain, and daily gain at 16 months. Were analyzed a total of 2812 productive records from animals and were found direct heritability moderate values, ranging between from 0.16 to 0.3 for GP16m and GP respectively. The direct heritability values always were higher than the maternal heritability values and the permanent environmental effects ranged between 0.024 ± 0.033 for PN until 0.067 ± 0.041 for P16m, but the repeatability values were higher for PD (0.41) and GPD (0.37) traits. With reference to the tendency of average yearly genetic values for direct effects, always displayed positive values and a increase tendency however a high variation between the years were found, conversely to the genetic maternal values than displayed generally values near to zero, but their tendency also was to increase. Is noteworthy than in spite of to be a conservation herd, than do not has been used for selection programs for those traits, was found a genetic tendency that suggest a positive genetic change.

Parámetros genéticos y tendencias para características de crecimiento en el ganado criollo sanmartinero en los Llanos Orientales de Colombia