Modelos de regressão aleatória para característica de crescimento em bovinos da raça guzerá

Translated title of the contribution: Random regression models for growth trait in Guzerá cattle

Jorge Luis Ferreira, Tiago Bresolin, Fernando Brito Lopes, José Américo Soares Garcia, Leandro Lopes Nepomuceno, Aline Beatriz Schmidt, Raysildo Barbosa Lobo

Research output: Contribution to journalArticlepeer-review


The aim of this study was to estimate (co)variance components and genetic parameters from birth to yearling weight (550 days of age) in Guzerá cattle, using random regression models. Data set from animals (male and female) born between 1993 and 2011 belonging to ten farms in seven Brazilian States were used. The best-fit model considering direct and maternal genetic effect and permanent environmental animal effect were adjusted by fourth, third, and second order, respectively, using orthogonal polynomials of Legendre. The higher estimated values of direct heritability were observed in birth (0.88) and yearling weight (0.70). The genetic correlations were moderate to high magnitude, remaining up even with the increase in the ages gap.

Translated title of the contributionRandom regression models for growth trait in Guzerá cattle
Original languagePortuguese
Article numbere39566
JournalCiencia Animal Brasileira
Issue number1
StatePublished - 2017
Externally publishedYes


  • Beef cattle
  • Genetic correlations
  • Heritability
  • Orthogonal polynomials of legendre

ASJC Scopus subject areas

  • Animal Science and Zoology
  • General Veterinary


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