Optimum genetic contribution applied to the selection of Santa Ines sheep

Authors

  • Natanael Pereira da Silva Santos Universidade Federal do Piauí, Campus Professora Cinobelina Elvas, BR‑135, Km 3, CEP 64900‑000 Bom Jesus, PI.
  • José Lindenberg Rocha Sarmento Universidade Federal do Piauí, Centro de Ciências Agrárias, Departamento de Zootecnia, Campus da Socopo, CEP 64049‑550 Teresina, PI.
  • Roberto Carvalheiro Universidade Estadual Paulista, Faculdade de Ciências Agrárias e Veterinárias, Via de Acesso Professor Paulo Donato Castellane, s/no, CEP 14884‑900 Jaboticabal, SP.
  • José Elivalto Guimarães Campelo Universidade Federal do Piauí, Centro de Ciências Agrárias, Departamento de Zootecnia, Campus da Socopo, CEP 64049‑550 Teresina, PI.
  • Wandrick Hauss de Sousa Empresa Estadual de Pesquisa Agropecuária da Paraíba S/A, Rua Eurípedes Tavares, no 210, Tambiá, CEP 58013‑290 João Pessoa, PB.
  • Luiz Antônio Silva Figueiredo Filho Instituto Federal do Maranhão, Campus Timon, Avenida Luis Firmino de Sousa, no 3.907, Multirão, CEP 65635‑468 Timon, MA.
  • Aurino de Araújo Rego Neto Universidade Estadual do Piauí, Avenida Dom Pedro II, no 629, Campus XI Corrente, CEP 64980‑000 Corrente, PI.
  • Daniel Biagiotti Colégio Agrícola de Bom Jesus, Campus Professora Cinobelina Elvas, BR‑135, Km 3, CEP 64900‑000 Bom Jesus, PI

DOI:

https://doi.org/10.1590/S1678-3921.pab2016.v51.22769

Keywords:

coancestry, inbreeding, differential evolution, genetic gain, response to selection

Abstract

The objective of this work was to evaluate strategies of simulated selection by optimum contribution for the genetic gain, with restriction on coancestry, for the weight trait of 84‑day old Santa Ines sheep. The analyses were performed using a differential evolution algorithm, which optimized an objective function accounting for average coancestry of the candidate animals for reproduction and genetic merit. The optimal selection strategy indicated the use of 19 rams, which would result in an expected average gain of 1.1259 units of standard deviation, and coancestry equal to 0.0249 (strategy 5). Compared to the selection based only on breeding values, the optimum strategy reduced the coancestry by 12%, and the genetic gain by only 3%. The selection of sheep by the optimum contribution offers different levels of genetic gain, which are achievable from restrictions on the coancestry. Therefore, it is possible to minimize the coancestry, or restrict it to a predefined value, and maximize the genetic gain while using the optimum contribution.

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Published

2016-08-23

How to Cite

Santos, N. P. da S., Sarmento, J. L. R., Carvalheiro, R., Campelo, J. E. G., Sousa, W. H. de, Figueiredo Filho, L. A. S., … Biagiotti, D. (2016). Optimum genetic contribution applied to the selection of Santa Ines sheep. Pesquisa Agropecuaria Brasileira, 51(6), 745–750. https://doi.org/10.1590/S1678-3921.pab2016.v51.22769

Issue

v.51, n.6, jun. 2016

Section

ANIMAL SCIENCE