Genetic diversity of Brazilian Brahman cattle by pedigree analysis

Authors

  • Ligia Cavani Universidade Estadual Paulista (Unesp), Rodovia Comandante João Ribeiro de Barros, Km 651, CEP 17900-000 Dracena, SP.
  • Rafael Medeiros de Oliveira Silva Universidade Estadual Paulista (Unesp), Via de Acesso Professor Paulo Donato Castellane, s/no, CEP 14884-900 Jaboticabal, SP.
  • Luis Orlando Duitama Carreño Universidade Estadual Paulista (Unesp), Via de Acesso Professor Paulo Donato Castellane, s/no, CEP 14884-900 Jaboticabal, SP.
  • Rafael Keith Ono Universidade Estadual Paulista (Unesp), Via de Acesso Professor Paulo Donato Castellane, s/no, CEP 14884-900 Jaboticabal, SP.
  • Tássia Souza Bertipaglia Universidade Estadual Paulista (Unesp), Via de Acesso Professor Paulo Donato Castellane, s/no, CEP 14884-900 Jaboticabal, SP.
  • Michel Marques Farah Universidade Estadual Paulista (Unesp), Via de Acesso Professor Paulo Donato Castellane, s/no, CEP 14884-900 Jaboticabal, SP.
  • Danilo Domingues Millen Universidade Estadual Paulista (Unesp), Rodovia Comandante João Ribeiro de Barros, Km 651, CEP 17900-000 Dracena, SP.
  • Ricardo da Fonseca Universidade Estadual Paulista (Unesp), Rodovia Comandante João Ribeiro de Barros, Km 651, CEP 17900-000 Dracena, SP.

DOI:

https://doi.org/10.1590/S1678-3921.pab2018.v53.25118

Keywords:

beef cattle, founders, genetic bottleneck, inbreeding

Abstract

The objective of this work was to evaluate the genetic diversity of Brahman cattle in Brazil with pedigree analysis. Genealogical records of a subpopulation were used considering all pedigree information (Pt) and the pedigree information divided into two periods (P1, from 1994 to 2004; and P2, from 2005 to 2012) or according to the raising system (Ppt, animals on pasture; or Pst, on stable). Estimates were obtained for average inbreeding coefficients, generation intervals (GI), number of equivalent known generation (CGE), number of founders (Nf), effective number of founders (fe), effective number of ancestors (fa), and founder genome equivalents (fg). The average inbreeding coefficients were 11.97, 7.79, 11.95, 11.74, and 11.31% for Pt, P1, P2, Ppt, and Pst, respectively. Average GI was 4.4 years, whereas CGE was 3.18. The fe values were similar to those of fa, which were greater than those of fg. The fe/fa and fg/fe ratios were close to 1, which indicates no genetic bottleneck and small losses by genetic drift. The genetic diversity in the Brazilian population of Brahman breed is not significantly reduced.

Author Biographies

Ligia Cavani, Universidade Estadual Paulista (Unesp), Rodovia Comandante João Ribeiro de Barros, Km 651, CEP 17900-000 Dracena, SP.

 http://lattes.cnpq.br/2885711638643589

Rafael Medeiros de Oliveira Silva, Universidade Estadual Paulista (Unesp), Via de Acesso Professor Paulo Donato Castellane, s/no, CEP 14884-900 Jaboticabal, SP.

http://lattes.cnpq.br/5008533803323085

Luis Orlando Duitama Carreño, Universidade Estadual Paulista (Unesp), Via de Acesso Professor Paulo Donato Castellane, s/no, CEP 14884-900 Jaboticabal, SP.

http://lattes.cnpq.br/9151636896965152

Rafael Keith Ono, Universidade Estadual Paulista (Unesp), Via de Acesso Professor Paulo Donato Castellane, s/no, CEP 14884-900 Jaboticabal, SP.

 http://lattes.cnpq.br/2068789458277902

Tássia Souza Bertipaglia, Universidade Estadual Paulista (Unesp), Via de Acesso Professor Paulo Donato Castellane, s/no, CEP 14884-900 Jaboticabal, SP.

 http://lattes.cnpq.br/9197562943211366

Michel Marques Farah, Universidade Estadual Paulista (Unesp), Via de Acesso Professor Paulo Donato Castellane, s/no, CEP 14884-900 Jaboticabal, SP.

 http://lattes.cnpq.br/3411481645407585

Danilo Domingues Millen, Universidade Estadual Paulista (Unesp), Rodovia Comandante João Ribeiro de Barros, Km 651, CEP 17900-000 Dracena, SP.

http://lattes.cnpq.br/7668049141035301

Ricardo da Fonseca, Universidade Estadual Paulista (Unesp), Rodovia Comandante João Ribeiro de Barros, Km 651, CEP 17900-000 Dracena, SP.

http://lattes.cnpq.br/0308352373545558

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Published

2018-02-16

How to Cite

Cavani, L., Silva, R. M. de O., Carreño, L. O. D., Ono, R. K., Bertipaglia, T. S., Farah, M. M., … da Fonseca, R. (2018). Genetic diversity of Brazilian Brahman cattle by pedigree analysis. Pesquisa Agropecuaria Brasileira, 53(1), 74–79. https://doi.org/10.1590/S1678-3921.pab2018.v53.25118

Issue

v.53, n.1, jan. 2018

Section

GENETICS