Desempenho e características da carcaça e da carne de bovinos de diferentes grupos genéticos
Carregando...
Arquivos
Data
2013-07-31
Autores
Brito, Gerlane Ferreira de [UNESP]
Título da Revista
ISSN da Revista
Título de Volume
Editor
Universidade Estadual Paulista (Unesp)
Resumo
Para o país aumentar a produção e manter os mercados ou conquistar novos, é necessário adequar recursos genéticos, ambientais, de manejo e de mercado. Esta busca por eficiência tem resultado não só em aumento da utilização dos cruzamentos, mas também no incremento do número de grupos genéticos utilizados e avaliados. O objetivo neste trabalho foi avaliar o desempenho, características de carcaça, parâmetros de qualidade e aceitação sensorial da carne de bovinos de corte de diferentes grupos genéticos terminados em confinamento. O experimento foi conduzido na Embrapa Pecuária Sudeste, em São Carlos - SP. Foram utilizados 121 bezerros, machos castrados (66) e fêmeas (55), terminados em confinamento, filhos de vacas Nelore, ½ Angus + ½ Nelore e ½ Senepol + ½ Nelore com touros das raças Canchim, Hereford e Pardo-Suíço tipo carne. Os animais foram confinados com cerca de 20 meses de idade, permanecendo no confinamento por aproximadamente 90 dias, e foram selecionados para abate em quatro diferentes datas, com base em avaliações do acabamento de carcaça. Amostras de carne do músculo Longissimus dorsi foram coletadas para análise instrumental da qualidade e aceitação sensorial da carne. As características de desempenho, carcaça, qualidade da carne e aceitação sensorial foram analisadas por meio de análises de variância, utilizando no modelo os efeitos fixos da raça do touro (RT), grupo genético da vaca (GGV), sexo do animal (Sexo), tempo de maturação da carne (TM) e suas interações, além dos efeitos aleatórios de animal e do resíduo, dependendo da característica, e as médias foram comparadas pelo teste de Tukey a 5% de significância. O peso final ao abate não foi influenciado por nenhum dos efeitos incluídos no modelo. A RT influenciou (P<0,05) o tempo de confinamento, sendo que os filhos dos touros Canchim foram os que ficaram mais tempo no confinamento...
To increase production and maintain or acquire new markets, the Brazilian beef industry needs to mach genetic, environmental, management and marketing resources. The search for efficiency has resulted in increased use of crossbreeding and of breeds used and evaluated. The objective of this work was to evaluate performance, carcass and meat traits of different beef cattle genetic groups finished in feedlot. The experiment was conducted at Embrapa Southeast Livestock, in São Carlos, SP, Brazil. One hundred twenty one calves, 66 castrated males and 55 females, the offspring of Nelore, ½ Angus + ½ Nelore and ½ Senepol + ½ Nelore cows and Canchim (5/8 Charolais + 3/8 Zebu), Hereford and Braunvieh bulls, were used. The animals were confined in feedlot at 20 months of age, during 90 days, and were selected for slaughter in four occasions, based on carcass fat thickness measured by ultrasound. Samples of Longissimus dorsi muscle were taken for instrumental and sensorial analyses. The performance, carcass and meat traits were analysed by analyses of variance with models that included the fixed effects of breed of sire (BS), genetic group of dam (GGD), sex (S), maturation period (MP), and their interactions, besides animal and residual random effects, depending on the trait, and the means were compared by Tukey’s test at 5% significance level. Slaughter weight was not affected by any of the effects in the model. BS affected (P<0.05) period on feedlot, as the offspring of Canchim bulls spent more time on feedlot. BS also affected (P<0.05) total dry matter intake, total body weight gain and feed efficiency; the offspring of Canchim bulls consumed and gained more and had higher efficiency than the offspring of Herford bulls, but were similar to the Braunvieh offspring. Carcass profitability, fat thickness and rib eye area were affected (P<0.05) by BS. In general, the offspring of Canchim bulls showed ...
To increase production and maintain or acquire new markets, the Brazilian beef industry needs to mach genetic, environmental, management and marketing resources. The search for efficiency has resulted in increased use of crossbreeding and of breeds used and evaluated. The objective of this work was to evaluate performance, carcass and meat traits of different beef cattle genetic groups finished in feedlot. The experiment was conducted at Embrapa Southeast Livestock, in São Carlos, SP, Brazil. One hundred twenty one calves, 66 castrated males and 55 females, the offspring of Nelore, ½ Angus + ½ Nelore and ½ Senepol + ½ Nelore cows and Canchim (5/8 Charolais + 3/8 Zebu), Hereford and Braunvieh bulls, were used. The animals were confined in feedlot at 20 months of age, during 90 days, and were selected for slaughter in four occasions, based on carcass fat thickness measured by ultrasound. Samples of Longissimus dorsi muscle were taken for instrumental and sensorial analyses. The performance, carcass and meat traits were analysed by analyses of variance with models that included the fixed effects of breed of sire (BS), genetic group of dam (GGD), sex (S), maturation period (MP), and their interactions, besides animal and residual random effects, depending on the trait, and the means were compared by Tukey’s test at 5% significance level. Slaughter weight was not affected by any of the effects in the model. BS affected (P<0.05) period on feedlot, as the offspring of Canchim bulls spent more time on feedlot. BS also affected (P<0.05) total dry matter intake, total body weight gain and feed efficiency; the offspring of Canchim bulls consumed and gained more and had higher efficiency than the offspring of Herford bulls, but were similar to the Braunvieh offspring. Carcass profitability, fat thickness and rib eye area were affected (P<0.05) by BS. In general, the offspring of Canchim bulls showed ...
Descrição
Palavras-chave
Bovino - Carcaças, Desempenho, Carne bovina, Carne - Qualidade, Eficiencia alimentar, Beef
Como citar
BRITO, Gerlane Ferreira de. Desempenho e características da carcaça e da carne de bovinos de diferentes grupos genéticos. 2013. vii, 68 p. Dissertação (mestrado) - Universidade Estadual Paulista, Faculdade de Ciências Agrárias e Veterinárias de Jaboticabal, 2013.