Características de carcaça e rendimento da porção comestível de machos Nelore comparados a cruzados (F1) obtidos do acasalamento de touros das raças Cachim, Santa Gestrudis, Caracu, Holandês e Suíço com fêmeas Nelore. II. Animais castrados terminados
Resumo

Este trabalho foi conduzido na Estação Experimental de Zootecnia de Andradina, do Instituto de Zootecnia, SP, para avaliar as características de carcaça de novilhos Nelore (NN), comparados com novilhos resultantes do cruzamento de vacas Nelore com touros das raças Canchim (CN), Santa Gertrudis (GN), Caracu (KN), Holandesa (HN) e Suiça (SN), terminados a pasto. Dentre as diversas características estudadas, destacam-se o peso da carcaça quente significativamente maior para os novilhos HN do que para os CN, KN, GN, SN e NN (respectivamente, 266,8, 262,2, 254,1, 252,6, 248,1 e 233,5 kg). O rendimento de carcaça quente, significativamente maior para NN e CN do que para KN, HN, SN e GN (respectivamente, 55,5, 56,1, 54,1, 54,2, 53,4 e 54,3%). Destaca-se também a percentagem de traseiro especial, significativamente maior para os CN e NN do que os SN, HN e KN, com os GN intermediários. Já a percentagem de porção comestível foi significativamente menor para os GN do que para os demais grupos.

Carcass characteristics and edible portion yields of Nellore—steers compared to crossbreds (F1) of Canchim, Santa Gertrudis, Caracu, Holstein and Swiss as sire breeds mated with Nellore. II. Pasture finished cattle
Abstract

The NN crossbreds had a significantly heavier live weight (429.8 kg) than KN (470.1 kg), CN (468.1 kg), GN (465.7 kg) or SN (465.0 kg) and NN wich had the lowest live weight (421.2 kg) Consequently, HN had heavier hot and chilled carcass weights (266.8 and 261.4 kg) than CN (262.6 and 256.8 kq), KN (254.1 and 248.9 kg) and GN (252.6 and 247.6 kg). SN as lower (248.1 and 242.7 kg) and NN the lowest (233.5 and 230.4 kq). CN (48.2%) and NN (47.4%) had higher percentages of special hindquater than SN (47.0%), GN (46.6%) with KN (46.0%) and HN (46.0%) having the lowest percentage. The edible portion percentage was higher for CN (72.3%), KN (71.9%), NN (71.5%), SN (71.4%) and HN (71.3%) than GN (69.0%). The KN crossbred had a significantly lower percentage of bone (18.2%) than HN (19.1 %) with NN. and other crossbreds intermediate. Fat thikness per 100 kg of carcass weight was significantly lower for the crosses than for NN (1.9 mm). Loin eye area per 100 kg carcass weight, measured at 12^th rib, was larger for SN (31.9 cm²) than for HN (27.5 cm²) with NN and the other crosses intermediate. Trimming percentage was lower for NN and cresses than for GN (12.6%). The CN, NN and SN steers had significantly higher percentages of special hindquarter, which is desirable because this is the carcass portion that contains the higher quality and priced cuts. From the standpoint of producing higher percentages of edible portion (total boneless closely trimmed retait cuts), CN, KN, NN, SN and HN were higher than GN.

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