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.

Downloads

Download data is not yet available.

References

BARBOSA, L. et al. Estimação de parâmetros genéticos em suínos usando Amostrador de Gibbs. Revista Brasileira de Zootecnia, Viçosa, v. 37, n. 7, p. 1200-1206, 2008.

BOUJENANE, I., KANSARI, J. Estimates of (co)variances due to direct and maternal effects for body weights in Timahdite sheep. Animal Science, Midlothian, v. 74, n. 4, p.409-414, 2002.

HANFORD, K. J., VAN VLECK, L. D., SNOWDER, G. D. Estimates of genetics parameters and genetic change for reproduction, weight, and wool characteristics of Columbia sheep. Journal Animal Science, Champaign, v. 80, n. 12, p.3086-3098, 2002.

HASSEN Y., FUERST-WALTL B., SÖLKNER, J. Genetic parameter estimates for birth weight, weaning weight and average daily gain in pure and crossbred sheep in Ethiopia. Journal of Animal Breeding and Genetics, United Kingdom, v. 120, n. 1, p. 29-38, 2003.

LÔBO, R. N. B. et al. Parâmetros genéticos de características estimadas da curva de crescimento de ovinos da raça Santa Inês. Revista Brasileira Zootecnia, Viçosa, v. 35, n. 3, p. 1012-1019, 2006. (Suplemento)

LÔBO, A. M. B. O. et al. Genetic parameters for growth, reproductive and maternal traits in a multibred meat sheep population. Genetics and Molecular Biology, Ribeirão Preto, v. 32, n. 4, p. 761-770, 2009.

MANIATIS, N., POLLOTT, G. E. The impact of data structure on genetic (co)variance components of early growth in sheep, estimated using an animal model with maternal effects. Journal Animal Science, Champaign, v. 81, n. 1, p. 101-108, 2003.

MARIA, G. A., BOLDMAN, K. G., VAN VLECK, L. D. Estimates of variance due to direct and maternal effects for growth traits of Romanov sheep. Journal Animal Science, Champaign, v. 71, n. 4, p. 845-852, 1993.

NESER, F. W. C., ERASMUS, G. J., VAN WYK, J. B. Genetic parameter estimates for pre-weaning weight traits in Dorper Sheep. Small Ruminants Resource, Little Rock, v. 40, n. 3, p. 197-202, 2001.

RAFTERY, A. E., LEWIS S. How many iterations in the Gibbs sampler? In: BERNARDO J. M.; BERGER J. O.; DAWID A. P.; SMITH A. F. M. (Ed.). Bayesian Statistics. New York: Oxford University Press, 1992. v. 4, p. 763-773.

RIGGIO, V., FINOCCHIARO, R., BISHOP, D. S. C. Genetic parameters for early lamb survival and growth in Scottish Blackface sheep. Journal Animal Science, Champaign, v. 86, n. 8, p. 1758-1764. 2008.

QUESADA, M., McMANUS, C., COUTO, F. A. D. Efeitos genéticos e fenotípicos sobre característica de produção e reprodução de ovinos deslanados no distrito federal. Revista Brasileira de Zootecnia, Viçosa, v. 31, n. 1, p. 342-349 2002. (Suplemento)

SARMENTO, J. L. R. et al. Estimação de parâmetros genéticos para características de crescimento de ovinos Santa Inês utilizando modelos uni e multicaracterísticas. Arquivo Brasileiro de Medicina Veterinária e Zootecnia, Belo Horizonte, v. 58, n. 4, p. 581-589, 2006

SIMM, G. et al. Responses to selection for lean growth in sheep. Animal Science, Midlothian, v. 74, n. 1, p. 39-50, 2002.

SMITH, B. J. 2005. Bayesian output analysis program (BOA) for MCMC. Avaliable at: http://www.public-health.uiowa.edu/boa/BOA.pdf. Accessed 18 Feb 2014.

SOUSA, W. H. et al. Estimativas de componentes de (co)variância e herdabilidade direta e materna de pesos corporais em ovinos da raça Santa Inês. Revista Brasileira de Zootecnia, Viçosa, v. 28, n. 6, p. 1252-1262, 1999.

SOUSA, J. E. R. et al. Efeitos genéticos e de ambiente para características de crescimento em ovinos Santa Inês no Estado do Ceará. Revista Ciência Agronômica, Fortaleza, v. 37, n. 3, p. 364-368, 2006.

TORRES, S. E. F. A. et al. Nematódeos de ruminantes em pastagem com diferentes sistemas de pastejo com ovinos e bovinos. Pesquisa Agropecuária Brasileira, Brasilia, v. 44, n. 9, p. 1191-1197, 2009.

Van TASSELL, C. P., Van VLECK, L. D. A manual for use of MTGSAM: A set of FORTRAN programs to apply Gibbs sampling to animal models for variance components estimation (DRAFT). Lincoln, 1985.

Van WYK, J. B., ERASMUS, G. J., KONSTANTINOV, K. V. Variance components and heritability estimates of early growth traits in the Elsenburg Dormer sheep stud. South Africa Journal Animal Science, Hatfield, v. 23, n. 3, p. 72-76, 1993.

YAZDI, M. H. et al. Bayesian analysis of birth weight and litter size in Baluchi sheep using Gibbs Sampling. Journal Animal Science, Champaign, v. 77, n. 3, p. 533-540, 1999.

Downloads

Published

19-11-2015

Issue

Section

Zootechnics