Published in
Rev. bras. saúde prod. anim., 4(15), p. 1006-1016
DOI: 10.1590/s1519-99402014000400008
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Correlated responses and genetic parameters for performance and carcass traits in a broiler line
,
L. G. Gaya,
Leila de Genova Gaya,
Gregori Alberto Rovadoscki,
Johanna Ramírez-Díaz,
José Bento Sterman Ferraz,
Tércio Michelan Filho,
Tércio Michelan Filho,
Gerson Barreto Mourão
Abstract
The growth rate of broilers has triplicated in the last decades. The body weight is used as one of the selection criteria whereas the carcass traits are valuable market requirements. Thus, the meat industry like animals with high weights at slaughter and better carcass traits. However, the genetic relation of carcass traits with several body weights is unknown. Therefore, we established genetic associations among performance and carcass traits in a broiler chicken line and estimated genetic gain and trends. We also evaluated what age of selection would lead to a more efficient indirect selection of carcass traits. The data set with information of weights in different ages and carcass traits of 128,459 chickens was used. The pedigree data used contained 132,442 chickens. Genetic analysis were realized using ASREML