BAYESIAN AND FREQUENTIST APPROACHES IN THREE TRAIT GENETIC ANALYSIS FOR GROWTH AND REPRODUCTION IN NELORE CATTLE

Authors

  • Carina Ubirajara de Faria Universidade Federal de Goiás (UFG), Goiânia, Goiás, Brasil
  • Cláudio de Ulhôa Magnabosco Embrapa Cerrados, Brasília, Distrito Federal, Brasil
  • Lúcia Galvão Albuquerque Universidade Estadual Paulista (UNESP), Jaboticabal, São Paulo, Brasil
  • Arcadio de los Reyes Universidade Federal de Goiás (UFG), Goiânia, Goiás, Brasil
  • Raysildo Barbosa Lôbo Associação Nacional de Criadores e Pesquisadores/ANCP
  • Luiz Antônio Framartino Bezerra Universidade de São Paulo (USP), Ribeirão Preto, São Paulo, Brasil

Abstract

The Bayesian inference has been proposed as an alternative for estimating variance components instead of the frequentist approach. The objective of this study was to estimate the (co)variance components and genetic parameters of growth and reproduction traits in Nelore cattle using three-trait animal model by Restricted Maximum Likelihood and Gibbs Sampling. The data set had 15,173 and 6,911 records of weight (W365) and scrotal circumference (SC365) at 365 days of age, respectively, and 10, 388 records of age at first calving (AFC), from the Nelore Breed Genetic Improvement Program farms. The linear model included the contemporary groups and age-of-dam (with exception for AFC) as fixed effects, and residual and additive direct genetic effects as random. Estimates obtained by Restricted Maximum Likelihood were different from those found by Gibbs Sampling. There were no differences in genetic parameter estimates using the three levels of prior information by Gibbs Sampling. The Bayesian inference has advantages in relation to Frequentist approach due to marginal distributions which offer more information about the parameters.

KEY WORDS: Beef cattle, genetic parameters, three-trait models.

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Published

2008-10-14

How to Cite

FARIA, Carina Ubirajara de; MAGNABOSCO, Cláudio de Ulhôa; ALBUQUERQUE, Lúcia Galvão; REYES, Arcadio de los; LÔBO, Raysildo Barbosa; BEZERRA, Luiz Antônio Framartino. BAYESIAN AND FREQUENTIST APPROACHES IN THREE TRAIT GENETIC ANALYSIS FOR GROWTH AND REPRODUCTION IN NELORE CATTLE. Brazilian Animal Science/ Ciência Animal Brasileira, Goiânia, v. 9, n. 3, p. 598–607, 2008. Disponível em: https://revistas.ufg.br/vet/article/view/964. Acesso em: 5 dec. 2025.

Issue

Vol. 9 No. 3 (2008)

Section

Animal Production

License

Copyright (c) 2008 Brazilian Animal Science/ Ciência Animal Brasileira

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