Estimation of predicted breeding value in crossbred dairy cattle in a herd in the highlands of Chimborazo, Ecuador

Authors

  • Carlos Octavio Larrea Izurieta Carrera de Medicina Veterinaria, Escuela Superior Politécnica Agropecuaria de Manabí Manuel Félix López
  • Ernesto Antonio Hurtado Carrera de Medicina Veterinaria, Escuela Superior Politécnica Agropecuaria de Manabí Manuel Félix López
  • Jorge Ignacio Macías Andrade Carrera de Medicina Veterinaria, Escuela Superior Politécnica Agropecuaria de Manabí Manuel Félix López
  • Leila Estefanía Vera Loor Carrera de Medicina Veterinaria, Escuela Superior Politécnica Agropecuaria de Manabí Manuel Félix López
  • Manuel José More Montoya Facultad de Zootecnia, Universidad Nacional Agraria La Molina

DOI:

https://doi.org/10.15381/rivep.v31i4.17519

Keywords:

imbreeding, crossbreeding, heritability, animal model, repeatability, breeding value

Abstract

The aim of this study was to estimate genetic parameters and predict genetic merit for milk production adjusted to 305 days (PL) in crossbred cattle as selection criteria. Records of productive data was used from 289 purebred and crossbred animals with 349 lactations between 2000 and 2019. To obtain the PL, the incomplete gamma equation proposed by Woods was applied. The statistical and animal models included the random effects: additive genetic, permanent and temporary environments, while the fixed effects were breed composition, lactation and year of initiation of lactation. To analyze the variance components for the calculation of heritability (h2) and repeatability (r) for PL, the VCE v. 6.0 program was used and the breeding values through the animal model using the MTDFRELM software. Eleven inbred animals were reported with a mean inbreeding coefficient of 0.107 ± 0.115. The mean PL was 2972.1 ± 51.1 kg. Differences were found in breed composition (p<0.05), number of lactations and year of initiation of lactation (p<0.01). The h2 was 0.26 ± 0.16 and r was 0.51 ± 0.15. The predicted genetic values for evaluated animals ranged between -241.5 and +266.5 kg of PL, highlighting the trihybrid breed composition between Holstein, Jersey, Monbéliarde and Red Swedish. Most of the breeding values are pronounced from the fourth lactation. It is concluded that the additive genetic effect is moderately heritable, which indicates the feasibility of increasing the PL, through the adequate selection of elite animals.

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Published

2020-12-21

Issue

Vol. 31 No. 4 (2020)

Section

Artículos Primarios

License

Copyright (c) 2020 Carlos Octavio Larrea Izurieta, Ernesto Antonio Hurtado, Jorge Ignacio Macías Andrade, Leila Estefanía Vera Loor, Manuel José More Montoya

Creative Commons License

This work is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License.

AUTHORS RETAIN THEIR RIGHTS:

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How to Cite

Larrea Izurieta, C. O., Hurtado, E. A., Macías Andrade, J. I., Vera Loor, L. E., & More Montoya, M. J. (2020). Estimation of predicted breeding value in crossbred dairy cattle in a herd in the highlands of Chimborazo, Ecuador. Revista De Investigaciones Veterinarias Del Perú, 31(4), e17519. https://doi.org/10.15381/rivep.v31i4.17519