Genetic correlation between feed efficiency and carcass traits in Nellore cattle in Brazil

The aim was to estimate the genetic correlations between residual feed intake (RFI) and dry matter (DMI) with carcass finish (CF), rib eye area (REA), marbling (MAR) of Nellore cattle. Data from 7,808 animals were considered. In addition, data 2,261 females included in complete database also Estimates variance covariance components, as well heritabilities obtained by means two-character analysis under animal model. Heritability estimates found be moderate for RFI (0.22) DMI (0.29) traits. It observed that correlation close zero all traits, except REA (-0.11). However, considering female population, there an increase estimated DMI, although still a favorable association low magnitude (-0.30). There (-0.21). can concluded direct selection will not influence CF, MAR, or this may generate some responses MAR females.