Desempenho em confinamento e composição da carcaça de raças zebuínas e caracu selecionadas com base no peso pós-desmame padronizado a 378 dias de idade
Autores
Romeu Fernandes Nardon, Luis Orlindo Tedeschi, Celso Boin, Alexandre Amstalden Moraes Sampaio, Alexander George Razook, Leopoldo Andrade de Figueiredo e Maria Lúcia Pereira Lima
Resumo
This paper evaluated growth performance and physical carcass composition of 144 intact males from four genetic groups (Nellore control, Nellore selected, Guzera and Caracu) slaughtered at three ages, based on the live weight of the heaviest group (400, 500 and 600 kg).
The variables analyzed were: live weight gain (LWG, kg/d), feed conversion (FC), dry matter intake (DMI, kg/100 kg live weight), slaughter weight (SW, kg), hot carcass weight (HCW, kg), dressing out percentage (DP, %), carcass physical fat (FAT, %), 9-1 1th rib physical fat (RFAT, %), carcass edible meat (EM, %), saleable hindquarter meat (SHM, %), rump loin (RL, %), eye muscle area (EMA, cm²), average fat depth (FD, mm) and half carcass cold weight (CCW, kg).
Nellore groups had higher SHM than Caracu (P < 0,05), and Zebu groups had higher FAT, RFAT and FD than Caracu (P < 0.05). FC and EM did not differ among genetic groups. FAT and RFAT were highly correlated for all genetic groups. Based on r² values, FC and EM were better correlated with physical carcass fat than with shrunk weight.
Anais do 6º World Congress on Genetics Applied to Livestock Production, Armidale, NSW, Austrália, Janeiro 1998, 25:137-140.
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