MEDICINAVETERINARIA Y ZOOTECNIA
Mundial de Búfalos Septiembre - diciembre 2016 - Página 146
Estimation of genetic parameters, breeding values and genetic trends for milk yield, calving interval and first calving age of buffaloes (Bubalus bubalis) in Tierralta – Córdoba (Colombia) Carlos Mario Duque1, MVZ, MSc, PhD(c); Henry Mesa2, MVZ, MSc, PhD GIPPA, Universidad de Caldas. Estudiante Doctorado Ciencias Agrarias. Profesor Auxiliar Universidad de Pamplona. ORCID 0000-0002-7286-6204; 2 GIPPA, Universidad de Caldas. Calle 65 #26-10 Manizales - Colombia. Profesor Departamento Producción Agropecuaria. ORCID 0000-0002-7008-8541.
[email protected] 1
It has been known for a long time that animals must be genetically evaluated and selected in the environment where they have to perform. However, most producers use as germplasm individuals selected in environmental conditions and with selection goals differing from local needs. The objective of this work was to estimate genetic parameters, breeding values and genetic trends for milk yield, calving interval and first calving age in the conditions of a buffalo production system in Colombia. Twenty-two years of records from a buffalo herd located in Tierralta – Córdoba (Colombia) were used. An animal model for univariate and bivariate analyses was fitted for first calving age (FCA), milk yield per lactation period (MY), and calving intervals (CI). Contemporary group and calving number were used as fixed effects for MY and CI, while only contemporary group was used for FCA. Estimated heritabilities (se) were 0.19 (0.03), 0.04 (0.02), and 0.26 (0.09) for MY, CI, and FCA, respectively. Genetic correlations (se) were 0.21 (0.03) between MY and CI, 0.23 (0.29) between MY and FCA, and 0.01 (0.60) between CI and FCA. Genetic trends were 0.38 ± 0.50 (P= 0.47), -0.38 ± 0.03 (P
