Predição da retalhabilidade das carcaças de novilhas nelore utilizando medidas ultrassonográficas

Abstract

The objectives of this work were to determine the correlations and to develop a prediction equation between traditional in vivo ultrasound measurements (PC, AOL, EGS, PP8 and EGP8) and their relation with the weights of the main commercial cuts. 81 Nellor heifers were randomly selected from a commercial herd. The evaluated cuts were of the forequarter, needle tip and the special hind. The correlation of body weight was high with the weight of commercial cuts. AOL and EGP8 showed positive correlations with the weight of the forequarter and special hind. The EGS presented a negative correlation with the CTE and the PP8 correlation was not significant with the CD, PA and CTE. For prediction, body weight was the first variable to enter the multiple linear regression model. AOL participated in the prediction of the weights of the cuts of the forequarter and of the special hind. The EGS and PP8 did not contribute to the predictions of the weights of the commercial cuts. The EGP8 entered the model of prediction of the weight of the cuts of the forequarter, tip of needle and the main cuts noble of the rear. Body weight and EGP8 were the most important ultrasonographic measures.