Genetic analysis of productive and reproductive traits in multiple-breed dairy cattle populations

Authors

  • Virginia Mara Pereira Ribeiro Universidade Federal de Minas Gerais, Escola de Veterinária, Departamento de Zootecnia, Avenida Antônio Carlos, no 6.627, Caixa Postal 567, Campus Pampulha, CEP 31270-901 Belo Horizonte, MG.
  • Fernanda Albuquerque Merlo Associação Brasileira dos Criadores de Zebu, Praça Vicentino Rodrigues da Cunha, no 110, Parque Fernando Costa, CEP 38022-330 Uberaba, MG.
  • Gabriela Canabrava Gouveia Universidade Federal de Minas Gerais, Escola de Veterinária, Departamento de Zootecnia, Avenida Antônio Carlos, no 6.627, Caixa Postal 567, Campus Pampulha, CEP 31270-901 Belo Horizonte, MG.
  • Larissa Kretli Winkelstroter Universidade Federal de Minas Gerais, Escola de Veterinária, Departamento de Zootecnia, Avenida Antônio Carlos, no 6.627, Caixa Postal 567, Campus Pampulha, CEP 31270-901 Belo Horizonte, MG.
  • Luiza Rodrigues Alves Abreu Universidade Federal de Minas Gerais, Escola de Veterinária, Departamento de Zootecnia, Avenida Antônio Carlos, no 6.627, Caixa Postal 567, Campus Pampulha, CEP 31270-901 Belo Horizonte, MG.
  • Marcos Vinicius Gualberto Barbosa da Silva Embrapa Gado de Leite, Rua Eugênio do Nascimento, no 610, Dom Bosco, CEP 36038-330 Juiz de Fora, MG.
  • João Cláudio do Carmo Panetto Embrapa Gado de Leite, Rua Eugênio do Nascimento, no 610, Dom Bosco, CEP 36038-330 Juiz de Fora, MG.
  • Leandro de Carvalho Paiva Associação Brasileira dos Criadores de Girolando, Rua Orlando Vieira do Nascimento, no 74, CEP 38040-280 Uberaba, MG.
  • Marcello de Aguiar Rodrigues Cembranelli Associação Brasileira dos Criadores de Girolando, Rua Orlando Vieira do Nascimento, no 74, CEP 38040-280 Uberaba, MG.
  • Fabio Luiz Buranelo Toral Universidade Federal de Minas Gerais, Escola de Veterinária, Departamento de Zootecnia, Avenida Antônio Carlos, no 6.627, Caixa Postal 567, Campus Pampulha, CEP 31270-901 Belo Horizonte, MG.

DOI:

https://doi.org/10.1590/S1678-3921.pab2017.v52.24427

Keywords:

Gyr, heritability, heterosis, Holstein, selection

Abstract

The objective of this work was to determine whether the random regression model using linear splines (RRMLS) is suitable to estimate the genetic parameters for productive and reproductive traits of a multiple-breed dairy cattle population, as well as to investigate the effect of the genetic group of the progeny on the genetic merit of the sire. The multiple-trait model (MTM) and the RRMLS with one knot fitted for every genetic group were used to obtain the genetic parameters. Records of 1/2 Holstein + 1/2 Gyr (1/2HG), 5/8 Holstein + 3/8 Gyr (5/8HG), and 3/4 Holstein + 1/4 Gyr (3/4HG) crossbreed dams were considered. The RRMLS showed better fitting. The additive and residual variances estimated by the MTM and the RRMLS were similar. Heritability varied from 0.20 to 0.33 for age at first calving, from 0.09 to 0.22 for first lactation length, and from 0.15 to 0.35 for first lactation 305-day milk yield, according to the genetic composition of the dams. The RRMLS is suitable to estimate the genetic parameters for productive and reproductive traits of multiple-breed dairy cattle populations. The genetic merit of the sires is affected by the genetic group of the progeny by which they are evaluated.

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Published

2017-12-18

How to Cite

Ribeiro, V. M. P., Merlo, F. A., Gouveia, G. C., Winkelstroter, L. K., Alves Abreu, L. R., da Silva, M. V. G. B., … Toral, F. L. B. (2017). Genetic analysis of productive and reproductive traits in multiple-breed dairy cattle populations. Pesquisa Agropecuaria Brasileira, 52(11), 1109–1117. https://doi.org/10.1590/S1678-3921.pab2017.v52.24427

Issue

v.52, n.11, nov. 2017

Section

ANIMAL SCIENCE