GENETIC CORRELATION ESTIMATES BETWEEN VISUAL SCORES AND GROWTH TRAITS IN NELORE CATTLE USING LINEAR-THRESHOLD BAYESIAN MODELS

Authors

  • Carina Ubirajara Faria UFG
  • Cláudio Ulhôa Magnabosco Embrapa Cerrados
  • Lúcia Galvão de Albuquerque UNESP/Jaboticabal
  • Arcadio de los Reyes EV/UFG
  • Luiz Antônio Framartino Bezerra FMRP/USP
  • Raysildo Barbosa Lôbo UNIDERP

DOI:

https://doi.org/10.5216/cab.v9i2.1273

Keywords:

Produção Anima, Melhoramento Genético

Abstract

The objective of this paper was to study the genetic correlations of the visual scores traits with the growth continuous traits, by applying bayesian statistic methodology, using two-trait analyses under linear-threshold animal models. The morphological categorical traits of musculature, physical structure, conformation and sacrum were studied in animals of the Nelore breed at the age of 8, 15 and 22 months, and also in adult cows; and the growth continuous traits, weights at the age of 210, 365 and 450 days old, as well as the adult weight of the cow. Estimates of genetic correlations between these visual scores (musculature, physical structure and conformation) with the growth traits were favorably positive, indicating that the selection of one of them will bring genetic progress to another. The results achieved in this study also indicated that the physical structure and the conformation are determined, to a large extent, by the same sets of genes as the weight. In the same way, the evaluated visual scores in adult cows presented high genetic correlations with the adult weight of the cow. As concerning the sacrum, the estimates of genetic correlations were low and negative.

 

KEY WORDS: Gibbs sampler, morphological traits, weights, zebu cattle.

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Author Biography

Carina Ubirajara Faria, UFG

Possui graduação em Medicina Veterinária pela Universidade Federal de Uberlândia (2000) , Mestrado em Medicina Veterinária Produção Animal pela Universidade Federal de Goiás (2003), Doutorado em Ciência Animal pela Universidade Federal de Goías (2007). Atualmente é Professora da Universidade FEderal de Goiás e Pesquisadora Associada da ANCP. Tem experiência na área de Produção e Melhoramento Genético Animal, atuando principalmente nos seguintes temas: Produção Animal, Bovinos de Corte, Características Categóricas, Modelos de Limiar, Parâmetros Genéticos

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Published

2008-07-09

How to Cite

FARIA, C. U.; MAGNABOSCO, C. U.; ALBUQUERQUE, L. G. de; REYES, A. de los; BEZERRA, L. A. F.; LÔBO, R. B. GENETIC CORRELATION ESTIMATES BETWEEN VISUAL SCORES AND GROWTH TRAITS IN NELORE CATTLE USING LINEAR-THRESHOLD BAYESIAN MODELS. Brazilian Animal Science/ Ciência Animal Brasileira, Goiânia, v. 9, n. 2, p. 327–340, 2008. DOI: 10.5216/cab.v9i2.1273. Disponível em: https://revistas.ufg.br/vet/article/view/1273. Acesso em: 22 dec. 2024.

Issue

Vol. 9 No. 2 (2008)

Section

Animal Production

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