PARÁMETROS Y TENDENCIAS GENÉTICAS PARA PESO AL  NACIMIENTO Y PESO AL DESTETE EN GANADO HARTÓN DEL  VALLE EN COLOMBIA

David E. Quintero Bastidas; Diego H.  Bejarano Garavito; Sonia D.  Ospina Hernández; Luis F.   Vargas Vivas; Edison J.  Ramírez Toro

doi:10.29393/CHJAA39-15PTDE50015

Authors

David E. Quintero Bastidas Corporación Colombiana de Investigación Agropecuaria, Agrosavia, Centro de Investigación Palmira. Palmira, Valle del Cauca, Colombia.
Diego H. Bejarano Garavito Corporación Colombiana de Investigación Agropecuaria, Agrosavia, Centro de Investigación Tibaitata. Bogotá, Cundinamarca, Colombia
Sonia D. Ospina Hernández Corporación Colombiana de Investigación Agropecuaria, Agrosavia, Centro de Investigación Palmira. Palmira, Valle del Cauca, Colombia
Luis F. Vargas Vivas Corporación Colombiana de Investigación Agropecuaria, Agrosavia, Centro de Investigación Palmira. Palmira, Valle del Cauca, Colombia.
Edison J. Ramírez Toro Corporación Colombiana de Investigación Agropecuaria, Agrosavia, Centro de Investigación El Nus. San Roque, Antioquia, Colombia

DOI:

https://doi.org/10.29393/CHJAA39-15PTDE50015

Keywords:

creole breeds, genetic correlatios, heritability, selection

Abstract

Proper management of animal genetic resources is essential to improve livestock production systems, which has been recognized by the livestock sector in Colombia. However, there is still a need for more in-depth knowledge of these resources in order to enable stakeholders make conservation-oriented decisions. The objective of this study was to determine genetic parameters and trends for birth weight (BW) and adjusted weaning weight at 240 days (AWW240) in Hartón del Valle (HDV) cattle in Colombia. Information was obtained from the Animal Germplasm Bank - Agrosavia Palmira Research Center, corresponding to 327 animals for the period 2013-2021. The data for BW and AWW240 were analyzed using a bi-character model that included sex, family, year of birth and weaning as fixed effects. The age of the mother at weaning was used as a covariate, while direct additive genetic, additive maternal genetic, and residual effects were also included. The (co)variance components and genetic parameters were obtained using the restricted maximum likelihood method (AIREMLF90 program). The average BW and AWW240 were 33,26 ± 4,46 kg and 186,99 ± 28,20 kg, respectively. The direct and maternal heritability was 0,44 and 0,16 for BW and 0,29 and 0,10 for AWW240, respectively. The direct genetic and phenotypic correlation between BW and
AWW240 was 0,25 and 0,26 respectively. The trends of direct breeding values for PN and PD240 were
positive, while those of maternal effects were negative for both traits. Heritability estimates show
that these traits could be improved by genetic selection processes. This is the first genetic evaluation carried out in this HDV breed, which represents an important advance in its characterization.