GM 03. Heritability of scrotal circumference adjusted and unadjusted for body weigth in Nellore bulls using uni and bivariate animal model

Authors

  • Celia Raquel Quirino LMGA/CCTA/Univ. Estadual do Norte Fluminense
  • Jose Aurelio Bergmann Escola de Veterinária, UFMG, Belo Horizonte, Brasil

Keywords:

Beef cattle, genetic parameters, reproductive and productive traits.

Abstract

Mixed model methodology under uni and bivariate animal models were used to estimated genetic parameters of scrotal circumference (SC) adjusted (h2AJ) and unadjusted (h2NAJ) by body weigth (BW), of 875 Nelore bulls. Fixed effects of age of dam, year of birth, month and year at measurement with covariate age for model 1 and with covariate age and body weigth for model 2 were analyzed. Heritability estimates using univariate model for h2AJ were .15, .60, .71 and .50 and for h2NAJ were .18, .65, .77 and .60 at 9, 12, 18 and 24 months, respectively. The bivariate h2AJ ranged from .13 and .70 and for h2NAJ ranged from .18 to .77. Genetic correlations varied from .33 and .71 for SC and BW. Estimates of h2NAJ might be the best parameters to be included in the future programs of breeding.

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Author Biography

  • Celia Raquel Quirino, LMGA/CCTA/Univ. Estadual do Norte Fluminense
    DESEO SER REFERI O CONSULTOR `AD HOC` DE LA revista Archivos Latinoamericanos de Produccion Animal. LENGUA NATIVA ESPAÑOL, RESIDENCIA Y TRABAJO EN BRASIL. Areas de actuación: Producción y Mejoramiento Animal de Bovinos, Ovinos y Bubalinos. Comportamiento sexual.

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Published

2005-10-03

Issue

Vol. 5 No. 3 (1997): Proceedings XV ALPA meeting 2

Section

Original paper

Categories

How to Cite

“GM 03. Heritability of Scrotal Circumference Adjusted and Unadjusted for Body Weigth in Nellore Bulls Using Uni and Bivariate Animal Model”. 2005. Latin American Archives of Animal Production 5 (3). https://revista.alpaenlinea.org/index.php/alpa/article/view/338.