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      Características de Carcaça e da Carne de Novilhos Filhos de Vacas 1/2 Nelore 1/2 Charolês e 1/2 Charolês 1/2 Nelore Acasaladas com Touros Charolês ou Nelore Translated title: Carcass and Meat Characteristics of Steers Produced by 1/2 Nellore 1/2 Charolais and 1/2 Charolais 1/2 Nellore Cows Mated with Charolais and Nellore Bulls

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          Abstract

          Este experimento foi conduzido com o objetivo de avaliar o efeito do cruzamento entre vacas 1/2 Nelore 1/2 Charolês com touros Charolês e 1/2 Charolês 1/2 Nelore com touros Nelore, sobre as características de carcaça e da carne de novilhos oriundos desses acasalamentos, abatidos aos dois anos de idade. Foram utilizados 80 novilhos 3/4 Nelore (N) 1/4 Charolês (C) e 136 novilhos 3/4 C 1/4 N. Os dados foram coletados de setembro de 1986 a dezembro de 1998. O modelo estatístico utilizado incluiu os efeitos classificatórios de grupo contemporâneo, idade da vaca e composição racial, bem como o efeito da idade do animal ao abate como covariável. Os novilhos 3/4 C 1/4 N foram superiores em peso de fazenda (468 contra 448 kg), conformação de carcaça (11,3 contra 10,4 pontos), porcentagem de músculo (66,9 contra 64,8%), área de Longissimus dorsi (69,5 contra 64,7 cm²), área de Longissimus dorsi ajustada para o peso de carcaça fria (27,9 contra 26,6 cm²), comprimento de carcaça (126 contra 123 cm), perímetro de braço (36,5 contra 35,4 cm) e maciez da carne (6,50 contra 5,20 pontos), enquanto os 3/4 N 1/4 C apresentaram maiores rendimento de carcaça (54,6 contra 53,7%), comprimento de perna (74,0 contra 72,0 cm) e de braço (41,5 contra 39,7 cm), espessura de gordura subcutânea (3,29 contra 2,70 mm) e porcentagem de gordura na carcaça (19,5 contra 17,8%). Não foi verificada diferença significativa para peso de carcaça fria, cor, textura, marmoreio, palatabilidade e suculência da carne.

          Translated abstract

          The objective of the experiment was to evaluate the carcass and meat characteristics of two year old steers, produced by the mating of 1/2 Nellore 1/2 Charolais cows with Charolais bulls and by mating 1/2 Charolais 1/2 Nellore cows with Nellore bulls. Eighty 3/4 Nellore 1/4 Charolais (NC) and 136 3/4 Charolais 1/4 Nellore steers were used. The data were collected from September 1986 to December 1998. In the statistical model were included the contemporary group effect, age of dam at calving and genetic group as class variable and age of steer in days at slaughter as covariable. 3/4 C 1/4 N steers were heavier in slaughter weight (468 vs. 448 kg), carcass conformation (11.3 vs. 10.4 points), muscle percentage (66.9 vs. 64.7%), Longissimus dorsi area (69.5 vs. 64.7 cm²), Longissimus dorsi area adjusted for 100 kg of cold carcass weight (27.9 vs. 26.6 cm²), carcass length (126 vs. 123 cm), arm perimeter (36.5 vs. 35.4 cm) and meat tenderness (6.50 vs. 5.20 points), while 3/4 N 1/4 C steers showed higher dressing percentage (54.6 vs. 53.7%), leg length (74.0 vs. 72.0 cm), arm length (41.5 vs. 39.7 cm), subcutaneous fat thickness (3.29 vs. 2.70 mm) and fat percentage (19.5 vs. 17.8%). No significant difference was observed for cold carcass weight, meat color, texture, marbling, flavor and juiciness.

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          Most cited references 35

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          Normas para avaliação de carcaças e concurso de carcaças de novilhos

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              Effective crossbreeding systems utilizing Zebu cattle.

               L Koger (1980)
              The basic objectives and procedures for successful crossbreeding of beef cattle were considered, with special reference to the levels of realized hybrid vigor that might be anticipated for different crossbreeding programs involving the American Brahman (Z1) and European (Ej) breeds. Intralocus heterozygosis levels with respect to breed origin of genes (breed heterozygosis) were computed for various crossbreeding systems. These values were weighted by approximate relative F1 heterosis levels for different breed combinations (1.0 for Z1Ej and .3 for E1E2) to yield the estimated relative hybrid vigor levels for total performance in alternative crossbreeding systems. The estimated average maternal heterosis levels for the various systems, were respectively 0, 33, 67, 66, 50, 54 and 49% for production of F1 (EZ) calves, three-breed terminal cross calves, two-breed-of-sire (E1--Z1) rotation crosses, three-breed-of-sire (Z1--E1--E2) rotation crosses, two-breed (Z X E) synthetics, three-breed (Z1 X E1E2) synthetics and four-breed (Z1E1 X E2E3) synthetics. The respective values for calf heterosis levels were 50, 57, 67, 66, 50, 54 and 49%. Successful crossbreeding requires (1) the choice of appropriate breed combinations for the environment and production system management programs to support the increased production potential or crossbred cattle.
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                Author and article information

                Contributors
                Role: ND
                Role: ND
                Role: ND
                Role: ND
                Role: ND
                Role: ND
                Role: ND
                Journal
                rbz
                Revista Brasileira de Zootecnia
                R. Bras. Zootec.
                Sociedade Brasileira de Zootecnia (Viçosa )
                1806-9290
                July 2002
                : 31
                : 4
                : 1734-1743
                Affiliations
                [1 ] Progepec Consultores Associados Ltda
                [2 ] Universidade Federal de Santa Maria Brazil
                Article
                S1516-35982002000700016
                10.1590/S1516-35982002000700016
                Product
                Product Information: website
                Categories
                AGRICULTURE, DAIRY & ANIMAL SCIENCE
                VETERINARY SCIENCES

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