Maternal effects on the genetic evaluation of Tabapuã beef cattle

The aim of this investigation was to study the influence of maternal effects on the genetic evaluation of sire production in Tabapua beef cattle. Single and multiple trait analyses were done with adjusted animal weights at 120, 240 and 420 days of age. Antagonism was observed between additive direct...

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Bibliographic Details
Published in:Genetics and molecular biology 2004, Vol.27 (4), p.517-521
Main Authors: Campêlo, José Elivalto Guimarães, Lopes, Paulo Sávio, Torres, Robledo de Almeida, Silva, Luiz Otávio Campos da, Euclydes, Ricardo Frederico, Araújo, Cláudio Vieira de, Pereira, Carmen Silva
Format: Article
Language:English
Subjects:
additive direct effects
beef cattle
BIOCHEMISTRY & MOLECULAR BIOLOGY
genetic parameters
GENETICS & HEREDITY
growth
maternal effects
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Summary:The aim of this investigation was to study the influence of maternal effects on the genetic evaluation of sire production in Tabapua beef cattle. Single and multiple trait analyses were done with adjusted animal weights at 120, 240 and 420 days of age. Antagonism was observed between additive direct and maternal genetic effects, with the maternal effect being higher until weaning. The inclusion of maternal effects in the models removed part of the additive variance only in single trait analyses and resulted in smaller means and standard deviations for the sire breeding values. The use of maternal effect associated with single or multiple traits may affect sire ranking. The contradictory results of the single and multiple trait analyses for additive direct and maternal effects indicate that caution is needed when considering recommendations about the importance of maternal effects in Tabapua beef cattle.
ISSN:1415-4757
1678-4685
1415-4757
1678-4685
DOI:10.1590/S1415-47572004000400009