GENETIC PARAMETERS FOR GROWTH TRAITS OF SANTA INES SHEEP USING GIBBS SAMPLING

Authors

  • Leandro Teixeira Barbosa Department of Zootechnology, UFS, Marechal Rondon Avenue, Rosa Elze, Zip Code 49100-000, São Cristovão, SE, Brazil.
  • Gleicianny de Brito Santos Department of Zootechnology, UFS, Marechal Rondon Avenue, Rosa Elze, Zip Code 49100-000, São Cristovão, SE, Brazil.
  • Evandro Neves Muniz Embrapa Tabuleiros Costeiros (CPATC), 3250 Beira Mar Avenue, Jardins, Mail Box 44, Zip Code 49025-040, Aracaju, SE. Brazil.
  • Hymerson Costa Azevedo Embrapa Tabuleiros Costeiros (CPATC), 3250 Beira Mar Avenue, Jardins, Mail Box 44, Zip Code 49025-040, Aracaju, SE. Brazil.
  • Jailson Lara Fagundes Department of Zootechnology, UFS, Marechal Rondon Avenue, Rosa Elze, Zip Code 49100-000, São Cristovão, SE, Brazil.

DOI:

https://doi.org/10.1590/1983-21252015v28n423rc

Keywords:

Bayesian analysis. Maternal effect. Birth weight. Weaning weight. High-density intervals.

Abstract

This study sought to estimate (co)variance and genetic parameters for birth weight (BWT) and weaning weight (WWT) in Santa Ines sheep. A total of 2,111 records were obtained from EMBRAPA/CPATC experimental herds, dating from the years 1998 to 2008. (Co)variance parameters were obtained through a twotrait analysis with the Gibbs sampling algorithm using the MTGSAM program. The mixed model included the environmental effects of sex, contemporary group and type of birth, in addition to residual, direct and maternal additive effects. Mean estimates of direct heritability for BWT and WWT were 0.25 and 0.09, respectively. Mean estimates of maternal heritability were 0.34 for BWT and 0.24 for WWT. The genetic correlation between BWT and WWT was 0.14. The results suggest that breeding Santa Ines sheep for meat production must take into consideration direct and maternal additive genetic effects.

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Published

19-11-2015

Issue

Section

Zootechnics