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Genetic trend estimates of meat quality traits in a male broiler line

MOURAO, G. B.; GAYA, L. G.; FERRAZ, J. B. S.; MATTOS, E. C.; COSTA, A. M. M. A.; MICHELAN FILHO, T.; CUNHA NETO, O. C.; FELICIO, A. M.; ELER, J. P.
Fonte: FUNPEC-EDITORA Publicador: FUNPEC-EDITORA
Tipo: Artigo de Revista Científica
ENG
Relevância na Pesquisa
66.41%
The present research was conducted to estimate the genetic trends for meat quality traits in a male broiler line. The traits analyzed were initial pH, pH at 6 h after slaughter, final pH, initial range of falling pH, final range of falling pH, lightness, redness, yellowness, weep loss, drip loss, shrink loss, and shear force. The number of observations varied between 618 and 2125 for each trait. Genetic values were obtained by restricted maximum likelihood, and the numerator relationship matrix had 107,154 animals. The genetic trends were estimated by regression of the broiler average genetic values with respect to unit of time (generations), and the average genetic trend was estimated by regression coefficients. Generally, for the traits analyzed, small genetic trends were obtained, except for drip loss and shear force, which were higher. The small magnitude of the trends found could be a consequence of the absence of selection for meat quality traits in the line analyzed. The estimates of genetic trends obtained were an indication of an improvement in the meat quality traits in the line analyzed, except for drip loss.; FAPESP (State of Sao Paulo Research Foundation)

Influência do estresse pré-abate na expressão gênica e qualidade da carne de frango (Gallus gallus); Influence of stress on gene expression and broiler meat quality

Almeida, Erik Amazonas de
Fonte: Biblioteca Digitais de Teses e Dissertações da USP Publicador: Biblioteca Digitais de Teses e Dissertações da USP
Tipo: Dissertação de Mestrado Formato: application/pdf
Publicado em 03/10/2007 PT
Relevância na Pesquisa
66.47%
A produção de carne de frango no Brasil é um importante setor do agronegócio. O setor passou por décadas de aprimoramentos, culminando desde 2004, no mais alto posto de exportação de carne de frango e ocupando a terceira maior produção mundial. A expansão, conquista e manutenção de novos mercados está inevitavelmente relacionada com a qualidade da matéria-prima. Entre os fatores que influenciam a qualidade do produto final, encontra-se o estresse no manejo pré abate. O presente estudo objetivou estabelecer relações entre a qualidade da carne de frangos e a expressão gênica sob condições de estresse térmico. Para tal, frangos de corte de linhagens comerciais foram submetidos a estresse térmico e abatidos. A carne oriunda dessas aves teve suas propriedades funcionais mensuradas. Os genes expressos de forma diferenciada para a qualidade da carne foram identificados pelo método de arranjos de alta densidade (macroarranjos) e validados com o emprego de PCR quantitativo em tempo real. Para os parâmetros de qualidade de carne avaliados (pH, cor e capacidade de retenção de água), os animais estressados apresentaram peito mais escuro a 1 hora pós abate (valor de L* de 52,46 contra 55,00; p<0,05), menor valor de pH as 24h pós abate (5...

Avaliação de parâmetros da qualidade da carne de frangos alimentados com farelo de trigo e fitase ou com adição de ácido fítico na dieta; Evaluation of meat quality parameters of broiler fed on wheat bran and phytase or with addition of phytic acid in the diet

Vargas, Taís Dufau de
Fonte: Universidade Federal do Rio Grande do Sul Publicador: Universidade Federal do Rio Grande do Sul
Tipo: Dissertação Formato: application/pdf
POR
Relevância na Pesquisa
66.44%
Com o objetivo de avaliar a qualidade da carne de frangos recebendo dietas com inclusão de ácido fítico (AF) ou com farelo de trigo (FT) e adição ou não de fitase, foram utilizados 216 frangos de corte Cobb 500®, machos, de 22 a 35 dias de idade. O delineamento experimental foi inteiramente casualizado com 6 tratamentos e 6 repetições com 6 animais cada. Foram testadas 6 dietas: 1- dieta controle (a base de milho e farelo de soja); 2- dieta controle com adição de AF; 3- dieta com 25% de FT e sem fitase; 4- dieta com 25% de FT + 6-fitase/2500 FTU/g (fitase A); 5- dieta com 25% de FT + 6-fitase/5000 FTU/g (fitase B); 6- dieta com 25% de FT + 3-fitase/5000 FTU/g (fitase C). Os parâmetros avaliados foram: peso da carcaça, peso e rendimento dos cortes de peito, de coxa e de perna de frango, pH inicial e final da carne, cor, lipídeo total, colesterol total (CT), oxidação lipídica (TBARS), perda de peso por descongelamento (PPD), perda de peso por cocção (PPC) e força de cisalhamento (FC). Os resultados indicaram não haver interação das diferentes dietas para as respostas de: peso da carcaça, peso e rendimento dos cortes, lipídio total, PPD, PPC e pH inicial, ou seja, todas estas variáveis mostraram-se semelhantes entre as dietas testadas...

Effect of different probiotics on broiler carcass and meat quality

Pelicano, ERL; Souza, PA de; Souza, HBA de; Oba, A; Norkus, EA; Kodawara, LM; Lima, TMA de
Fonte: Fundação APINCO de Ciência e Tecnologia Avícolas Publicador: Fundação APINCO de Ciência e Tecnologia Avícolas
Tipo: Artigo de Revista Científica Formato: 207-214
ENG
Relevância na Pesquisa
66.39%
Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP); The present work evaluated the effect of different probiotics on carcass and meat quality of broilers. One thousand and fifty male Cobb chicks were distributed at one day of age in a randomized design with 3 x 2 + 1 factorial arrangement (3 probiotics, 2 levels of probiotics in drinking water and 1 negative control group), using 5 replications with 30 birds. Carcass yield was higher (p<0.05) in control birds. Nevertheless, the groups fed with probiotics showed higher (p<0.01) leg yield at 45 days of age. There was a significant decrease in color (lightness) and increase in pH of breast muscle 5 hours after slaughter in the probiotics treated birds. In the sensory analysis, meat flavor and general aspect 72 hours after slaughter were better when probiotics were added in both water and diet. There were no differences in water holding capacity, cooking loss and shearing force among different probiotics or between them and the control. Thus, meat quality was better when probiotics were fed in the water and diet instead of only in the diet. Nevertheless, carcass and meat quality showed no alteration when the control group was compared to birds fed with probiotics, except for leg yield improvement in the latter.

Ostrich (Struthio camellus) carcass yield and meat quality parameters

Balog, Augusto; Almeida Paz, ICL
Fonte: Fundação APINCO de Ciência e Tecnologia Avícolas Publicador: Fundação APINCO de Ciência e Tecnologia Avícolas
Tipo: Artigo de Revista Científica Formato: 215-220
ENG
Relevância na Pesquisa
66.41%
This article aimed at compiling recent studies on the main factors that influence ostrich meat quality and carcass yield. Few articles investigated the effect of subspecies, which generally are not even mentioned. There are important dietary effects, particularly those caused by dietary protein to energy ratio. Rigor mortis follow-up studies showed that there are no losses in meat quality when carcasses are hot-deboned. Age at slaughter influences some meat quality traits, such as tenderness and lipid content. Few effects of gender have been observed, and at the same age at slaughter, both male and female present the same meat quality traits.

Evaluation of a commercially available organic acid product on body weight loss, carcass yield, and meat quality during preslaughter feed withdrawal in broiler chickens: A poultry welfare and economic perspective

Menconi, A.; Kuttappan, V. A.; Hernandez-Velasco, X.; Urbano, T.; Matte, F.; Layton, S.; Kallapura, G.; Latorre, J.; Morales, B. E.; Prado, O.; Vicente, J. L.; Barton, J.; Andreatti Filho, R. L.; Lovato, M.; Hargis, B. M.; Tellez, G.
Fonte: Oxford University Press Publicador: Oxford University Press
Tipo: Artigo de Revista Científica Formato: 448-455
ENG
Relevância na Pesquisa
66.36%
The effect of a commercial organic acid (OA) product on BW loss (BWL) during feed withdrawal and transportation, carcass yield, and meat quality was evaluated in broiler chickens. Two experiments were conducted in Brazil. Commercial houses were paired as control groups receiving regular water and treated groups receiving OA in the water. Treated birds had a reduction in BWL of 37 g in experiment 1 and 32.2 g in experiment 2. In experiment 2, no differences were observed in carcass yield between groups. Estimation of the cost benefit suggested a 1: 16 ratio by using the OA. In experiment 3, conducted in Mexico, significant differences on water consumption, BWL, and meat quality characteristics were observed in chickens that were treated with the OA (P < 0.05). These data suggest this OA product may improve animal welfare and economic concerns in the poultry industry by reducing BWL and improving meat quality attributes.

Efeitos da castração no ganho de peso, caracteristicas de carcaça e qualidade da carne de bovinos machos da raça nelore; Effects of castration of nelore bovine males on weight gain, carcass traits and meat quality

Renata Jorge Anaruma
Fonte: Biblioteca Digital da Unicamp Publicador: Biblioteca Digital da Unicamp
Tipo: Dissertação de Mestrado Formato: application/pdf
Publicado em 22/02/2010 PT
Relevância na Pesquisa
66.41%
Este trabalho foi desenvolvido para comparar bovinos machos castrados à desmama, ao final da fase de recria, e não castrados, todos abatidos com 30 meses de idade, em relação ao ganho de peso, rendimentos de abate e desossa, composição da carcaça, e de qualidade sensorial e físico-química da carne. Foram utilizados 24 bovinos Nelore machos, desmamados entre os 6 e 8 meses de idade e mantidos em regime de pastejo em Brachiaria brizantha com fornecimento de sal mineral, durante a época das águas, suplemento mineral protéico durante o período da seca e fornecimento de concentrado nos dois meses que antecederam o abate. Os tratamentos foram: T1: castrados na desmama; T2: castrados aos 20 meses de idade; T3: não castrados. Foram coletados dados de ganho de peso, espessura de gordura por ultrassonografia, peso de carcaça quente e fria, rendimento de carcaça, pH e temperatura das carcaças; pesos de vísceras comestíveis, cortes comerciais, dianteiro, ponta de agulha, traseiro, e peso dos ossos; espessura de gordura subcutânea e área de olho de lombo na 12ª. costela; cor (visual e instrumental); determinações de umidade e lipídios totais; teor de gordura intramuscular (mármore visual), e análise sensorial. Os machos não castrados apresentaram maior ganho de peso...

The use of multivariate analysis to characterize carcass and meat quality of goat kids protected by the PGI "Cabrito de Barroso"

Santos, Virgínia; Silva, J.A.; Silvestre, Mário; Silva, Severiano; Azevedo, Jorge Manuel Teixeira de
Fonte: LIVESTOCK SCIENCE Publicador: LIVESTOCK SCIENCE
Tipo: Artigo de Revista Científica
ENG
Relevância na Pesquisa
66.51%
Fifty five suckling kids from three genotypes and two sexes protected by the PGI "Cabrito de Barroso" European quality label were used in this experiment. Carcass quality was assessed using indices from carcass measurements, dressing percentages, refrigerated losses, higher priced joints proportion and tissue composition of the carcass. Meat pH, colour, total pigment, fat, dry matter, collagen determinations (total and soluble), cooking losses and shear force estimated in longissimus thoracis et lumborum (LTL) and gluteobiceps (GB) muscles were used to characterize meat quality. Principal component (PC) analysis was performed in order to examine carcass quality traits (n = 16) and meat quality (n = 16) traits. The five first principal components (PCs) explained about 86% of the total variability for carcass quality and 75% of the total variability for meat quality. Compactness indices of carcass and leg, carcass weight and subcutaneous fat were the most effective variables for the PC 1, whereas the higher priced joints proportion, muscle proportions of the higher priced joints and of the carcass and the muscle and bone ratio were useful to define the PC2. The first PC of the meat quality parameters was characterized by colour traits (L*...

Effect of pasture biomass intake on growth performance and meat quality of free-range broilers

Ponte, Patrícia Isabel Pinheiro da
Fonte: Universidade Técnica de Lisboa. Faculdade de Medicina Veterinária Publicador: Universidade Técnica de Lisboa. Faculdade de Medicina Veterinária
Tipo: Tese de Doutorado
Publicado em 02/06/2008 ENG
Relevância na Pesquisa
66.41%
Tese de Doutoramento em Ciência e Tecnologia Animal; Os efeitos da ingestão de pastagem no desempenho produtivo e na qualidade da carne de frangos em crescimento, bem como o potencial interesse da suplementação das dietas destes animais com celulases e hemicelulases na produção de frangos ao ar livre continuam por avaliar. Os resultados obtidos neste trabalho revelam que a ingestão de pastagem incrementa o desempenho produtivo e contribui para a melhoria dos atributos sensoriais da carne de frango. No entanto, a ingestão de pastagem foi baixa em aves com acesso ad libitum ao alimento composto. A restrição da ingestão do alimento à base de cereais originou um aumento no consumo relativo de pastagem de leguminosas, promovendo o desempenho produtivo das aves. Por outro lado, a suplementação da dieta com celulases e hemicelulases não afectou o crescimento de frangos com acesso a pastagens à base de leguminosas. Os resultados sugerem que em aves de estirpes de crescimento lento criados em sistemas de produção ao ar livre, B-glucanases de origem desconhecida podem afectar a eficiência de enzimas exógenas adicionadas a dietas à base de cevada. A baixa ingestão de pastagem resultou num efeito moderado no perfil de ácidos gordos e homólogos da vitamina E na carne de aves provenientes de sistemas de produção ao ar livre. No entanto...

Rational use of dietary enzymes and lipids to improve broiler performance and meat quality

Ribeiro, Teresa Paula Costa
Fonte: Universidade Técnica de Lisboa. Faculdade de Medicina Veterinária Publicador: Universidade Técnica de Lisboa. Faculdade de Medicina Veterinária
Tipo: Tese de Doutorado
Publicado em 29/11/2011 ENG
Relevância na Pesquisa
66.37%
Tese de Doutoramento em Ciências Veterinárias. Especialidade de Ciências Biológicas e Biomédicas.; The importance of carbohydrate-binding modules (CBMs) and the use of novel enzymes with specific catalytic activities to improve the nutritive value of barley based diets for broilers and the effectiveness of a lipidic supplementation to improve the levels of benefic fatty acids in broilers meat remain to be investigated. In this work we studied the importance of a β-glucan binding domain (CBM11) when appended to three different enzymes (GH26GH5 and GH16, belonging to Clostridium thermocellum, and GH5, belonging to Celvibrio mixtus) to improve the nutritional quality of barley-based diets for broilers. In addition, the crystal structure and biochemical properties of a family 42 carbohydrate binding module (CBM) from Clostridium thermocellum, termed CtCBM42A, were investigated. Data presented here revealed that CBM11 has an important target effect in directing the appended catalytic modules to their target substrates, resulting in an improvement in broiler performance. However, this effect seems to be dependent on the level of supplementation. In addition, barley composition, namely its endogenous β-glucanase activity, influences the response to enzyme supplementation. Thus...

Effect of different probiotics on broiler carcass and meat quality

Pelicano,ERL; Souza,PA de; Souza,HBA de; Oba,A; Norkus,EA; Kodawara,LM; Lima,TMA de
Fonte: Fundação APINCO de Ciência e Tecnologia Avícolas Publicador: Fundação APINCO de Ciência e Tecnologia Avícolas
Tipo: Artigo de Revista Científica Formato: text/html
Publicado em 01/12/2003 EN
Relevância na Pesquisa
66.39%
The present work evaluated the effect of different probiotics on carcass and meat quality of broilers. One thousand and fifty male Cobb chicks were distributed at one day of age in a randomized design with 3 x 2 + 1 factorial arrangement (3 probiotics, 2 levels of probiotics in drinking water and 1 negative control group), using 5 replications with 30 birds. Carcass yield was higher (p<0.05) in control birds. Nevertheless, the groups fed with probiotics showed higher (p<0.01) leg yield at 45 days of age. There was a significant decrease in color (lightness) and increase in pH of breast muscle 5 hours after slaughter in the probiotics treated birds. In the sensory analysis, meat flavor and general aspect 72 hours after slaughter were better when probiotics were added in both water and diet. There were no differences in water holding capacity, cooking loss and shearing force among different probiotics or between them and the control. Thus, meat quality was better when probiotics were fed in the water and diet instead of only in the diet. Nevertheless, carcass and meat quality showed no alteration when the control group was compared to birds fed with probiotics, except for leg yield improvement in the latter.

Ostrich (Struthio camellus) carcass yield and meat quality parameters

Balog,A; Almeida Paz,ICL
Fonte: Fundação APINCO de Ciência e Tecnologia Avícolas Publicador: Fundação APINCO de Ciência e Tecnologia Avícolas
Tipo: Artigo de Revista Científica Formato: text/html
Publicado em 01/12/2007 EN
Relevância na Pesquisa
66.41%
This article aimed at compiling recent studies on the main factors that influence ostrich meat quality and carcass yield. Few articles investigated the effect of subspecies, which generally are not even mentioned. There are important dietary effects, particularly those caused by dietary protein to energy ratio. Rigor mortis follow-up studies showed that there are no losses in meat quality when carcasses are hot-deboned. Age at slaughter influences some meat quality traits, such as tenderness and lipid content. Few effects of gender have been observed, and at the same age at slaughter, both male and female present the same meat quality traits.

Preparation of biological fish silage and its effect on the performance and meat quality characteristics of quails (Coturnix coturnix japonica)

Ramírez,José Carmen Ramírez; Ibarra,José Inés; Romero,Francisco Arce; Ulloa,Petra Rosas; Ulloa,José Armando; Matsumoto,Keiko Shirai; Cordoba,Belinda Vallejo; Manzano,Miguel Ángel Mazorra
Fonte: Instituto de Tecnologia do Paraná - Tecpar Publicador: Instituto de Tecnologia do Paraná - Tecpar
Tipo: Artigo de Revista Científica Formato: text/html
Publicado em 01/12/2013 EN
Relevância na Pesquisa
66.37%
The aim of the present study was to produce fish silage by lactic acid fermentation and evaluate its use in feeding of quails (Coturnix coturnix japonica). An oven-dried mixture of fish silage and soybean meal (1:1 w/w) was used to prepare the diets with different levels of inclusion (0, 10, 20 and 30%) and evaluate its effect on the performance and meat quality of 160 quails. The inclusion level did not affect the growth and feed conversion ratio. The carcass yield (70.3%) and sensory quality of breast meat were not significantly different among the treatments (p>0.05). However, the concentration of unsaturated fatty acids such as oleic (C18:1n9C), linoleic (C18:2n6C), linolenic (C18:3n3), arachidonic (C20:4n6), cis eicosapentaenoic (C20:5n3) and cis docosahexaenoic (C22:6n3) increased in quail breast meat with the inclusion of fish silage:soybean mixture in the diet (p<0.05). Fish silage and its use in quail diets could offer a good alternative for fish waste utilization as feedstuff component for the improvement of fatty acid composition in its breast meat.

Progress in DNA marker studies of beef carcass composition and meat quality in New Zealand and Australia

Morris, C.; Cullen, N.; Hickey, S.; Crawford, A.; Hyndman, D.; Bottema, C.; Pitchford, W.
Fonte: AAABG DISTRIBUTION SERVICE; AUSTRALIA Publicador: AAABG DISTRIBUTION SERVICE; AUSTRALIA
Tipo: Conference paper
Publicado em //2001 EN
Relevância na Pesquisa
66.39%
Two beef cattle DNA-marker trials in New Zealand and Australia are reviewed, where the trial objectives were to identify DNA markers for carcass composition and meat quality traits. The collaborative beef cattle project between AgResearch and Adelaide University is described in detail, and reference is also made to published data from the Australian ‘Cooperative Research Centre (CRC) for Meat Quality’ DNA-marker study. In the Beef CRC, F1 Charolais x Brahman bulls were mated to composite dams to breed experimental offspring. The AgResearch/ Adelaide study used two extreme breeds, Jersey and Limousin, with F1 Jersey x Limousin bulls mated to produce both backcrosses in both New Zealand and Australia. Detailed information is presented here from New Zealand only (416 animals), comprising firstly live-animal records including ultrasound fat- and muscle-depth data, metabolites from fat and muscle biopsies, and plasma cortisol at slaughter, secondly carcass dissection data and organ weights, and thirdly shear-force tenderness, pH measures and some detailed biochemistry from the right striploin. A whole-genome scan was carried out with an average of 185 informative microsatellite markers per sire (range 170-196), spread widely across the autosomes. Quantitative trait loci (QTL) were identified for 14 phenotypes (with a genome-wide threshold level of significance)...

Genetic mapping of quantitative trait loci for meat quality and muscle metabolic traits in cattle

Esmailizadeh Koshkoih, A.; Morris, C.; Cullen, N.; Kruk, Z.; Lines, D.; Hickey, S.; Dobbie, P.; Bottema, C.; Pitchford, W.
Fonte: Blackwell Publishing Ltd Publicador: Blackwell Publishing Ltd
Tipo: Artigo de Revista Científica
Publicado em //2011 EN
Relevância na Pesquisa
66.48%
A whole-genome scan was carried out in New Zealand and Australia to detect quantitative trait loci (QTL) for live animal and carcass composition traits and meat quality attributes in cattle. Backcross calves (385 heifers and 398 steers) were generated, with Jersey and Limousin backgrounds. The New Zealand cattle were reared and finished on pasture, whilst Australian cattle were reared on grass and finished on grain for at least 180 days. This paper reports on meat quality traits (tenderness measured as shear force at 4–5 ages on two muscles as well as associated traits of meat colour, pH and cooking loss) and a number of metabolic traits. For meat quality traits, 18 significant QTL (P < 0.05), located in nine linkage groups, were detected on a genome-wise basis, in combined-sire (seven QTL) or within-sire analyses (11 QTL). For metabolic traits, 11 significant QTL (P < 0.05), located in eight linkage groups, were detected on a genome-wise basis, in combined-sire (five QTL) or within-sire analyses (six QTL). BTA2 and BTA3 had QTL for both metabolic traits and meat quality traits. Six significant QTL for meat quality and metabolic traits were found at the proximal end of chromosome 2. BTA2 and BTA29 were the most common chromosomes harbouring QTL for meat quality traits; QTL for improved tenderness were associated with Limousin-derived and Jersey-derived alleles on these two chromosomes...

Variables impacting poultry meat quality from production to pre-slaughter: a review

Baracho,MS; Camargo,GA; Lima,AMC; Mentem,JF; Moura,DJ; Moreira,J; Nääs,IA
Fonte: Fundação APINCO de Ciência e Tecnologia Avícolas Publicador: Fundação APINCO de Ciência e Tecnologia Avícolas
Tipo: Artigo de Revista Científica Formato: text/html
Publicado em 01/12/2006 EN
Relevância na Pesquisa
66.5%
Poultry meat quality has been widely studied, and has become a growing demand of the international market. Parameters that affect meat quality are complex, and occur throughout the production chain. The constant concern with meat quality by the exporting sectors is a response to consumers' demands, and is achieved by increasing efficiency, and investments in personnel training on quality. Understanding where critical points are in the poultry meat production chain, and investing in solving critical problems may lead to better control and management, and consequent reduction of losses. Production and management practices, from farm to processing plant, play an important role in meat quality, and the use of technologies to reduce risk factors throughout the production chain will allow the production of better quality poultry meat not only for exports, but also for the domestic market. This review describes the main factors that influence poultry meat quality in the production chain.

Genotype and sex effects on carcass and meat quality of suckling kids protected by the PGI "Cabrito de Barroso"

Santos, Virgínia; Silva, A.O.; Cardoso, J.V.F.; Silvestre, A.J.D.; Silva, Severiano; Martins, C.; Azevedo, Jorge Manuel Teixeira de
Fonte: ELSEVIER SCI TD Publicador: ELSEVIER SCI TD
Tipo: Artigo de Revista Científica
ENG
Relevância na Pesquisa
66.41%
Carcass composition and meat quality traits were evaluated in 55 suckling kids (27 males and 28 females) from Serrana (S), Bravia (B) and Serrana x Bravia (SxB) crossbred genotypes. Kids were slaughtered at 8-11 kg of live weight according to "Cabrito de Barroso-PGF" specifications and carcasses' left sides were totally dissected. Dressing percentage (based on ELW) did not vary between genotypes and sexes. Genotype B carcasses have better conformation, expressed in higher compactness index and muscle/bone ratio. Sex had no effect on the composition of dissected carcass but females deposited more internal fat than males. S genotype had significantly less muscle content and higher dissectible fat compared to B and SxB genotypes, suggesting differences in maturity stages. The carcass' bone content (20.4-21.4%) did not differ significantly between genotypes. The longissimus thoracis et lumborum (LTL) and gluteobiceps (GB) muscles were used for meat quality determinations. Genotype had a significant effect on meat traits and fatty acid composition of the analysed muscles: B genotype and LTL muscle showed lower final pH, SxB genotype had darker and more red muscles, GB muscle had a higher shear force value and lower collagen solubility. Few sex effects were observed on meat quality traits as well as on fatty acid composition. Average percentage of desirable fatty acids in kids was superior to 60% with male S genotype displaying a lower value. Genotypes B and BxS...

Effect of production system on performance traits, carcass and meat quality in Brown Swiss young cattle

Cerdeño, Ana Isabel; Vieira, Ceferina; Serrano, Emma; Mantecón, Ángel R.
Fonte: Polish Academy of Sciences Publicador: Polish Academy of Sciences
Tipo: Artículo Formato: 5157531 bytes; application/pdf
ENG
Relevância na Pesquisa
66.38%
8 pages, 3 tables.; Performance, carcass and meat quality were assessed in 3 groups of Brown Swiss male calves, all of them suckled by their dams: groups M200 and M250 were exclusively milk-fed and slaughtered at 200 or 250 kg, respectively, and G400 group was supplemented with grain and slaughtered at 400 kg after a short finishing period. Increasing weight in milk-fed animals led to an increase in dressing percentage and conformation score, and a decrease in muscle content with an increase in dissectible fat in the rib, with no repercussions on meat quality. G400 group showed higher values in compactness index, percentage of high-priced cuts and dissectible fat content than the lighter milk-fed groups. Regarding meat quality, the only remarkable difference in grain-fed animals was a higher a* index, with no detectable differences in sensory traits.; Peer reviewed

Characteristic of slaughter value and meat quality of three synthetic pig lines

Przybylski,W.; Jaworska,D.; Olczak,E.; Namysław,I.; Kajak-Siemaszko,K.; Santé-Lhoutellier,V.; Niemyjski,S.
Fonte: South African Journal of Animal Science Publicador: South African Journal of Animal Science
Tipo: Artigo de Revista Científica Formato: text/html
Publicado em 01/01/2010 EN
Relevância na Pesquisa
66.41%
The aim of the study was to evaluate the quality of meat in different lines of pigs with consideration of the intramuscular fat level of the longissimus muscle. The research was conducted on 60 pigs from three pig lines, P76, Redone and Galia, (20 gilts in each group), slaughtered at ca. 105 kg live weight. The percentage meat in the carcass and hot carcass weight were estimated. Samples were taken from the longissimus muscle. The pH value after 1, 3 and 24 h post mortem, natural drip loss, cooking yield and parameters of meat colour were measured. Furthermore, fat level and glycolytic potential (GP) of the muscle were determined. Intramuscular fat level was determined chemically, and marbling on the basis of sensory evaluation according to a Japanese photographic standard. The results showed significant differences between lines in slaughter value of carcasses and for pH3, pH24, GP, colour parameters and marbling of raw meat. The P76 line was characterised as the most meaty line with satisfactory meat quality. The Redone line was characterised by meat with the highest intramuscular fat content and marbling.

The effect of dietary energy and the inclusion of a ß-adrenergic agonist in the diet on the meat quality of feedlot lambs

Brand,T.S; Genis,M.P; Hoffman,L.C; van de Vyver,W.F.J; Swart,R; Jordaan,G.F
Fonte: South African Journal of Animal Science Publicador: South African Journal of Animal Science
Tipo: Artigo de Revista Científica Formato: text/html
Publicado em 01/07/2013 EN
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β-adrenergic agonists are commonly used in livestock production to enhance meat production and decrease the fat content of the body. β-adrenergic agonists normally improve growth performance. Recent increases in meat prices and the change in consumer preference towards leaner meat have resulted in more lamb producers opting to finish leaner mutton/lamb on farms in a feedlot system. The aim of this trial was to determine the effect of dietary energy, as well as the inclusion of a β-antagonist, on the meat quality of feedlot lambs. South African Mutton Merino lambs (108) of different sexes (rams and ewes) were weaned at 120 days of age and were randomly divided into six groups (18 lambs per group). The treatment consisted of three different dietary energy levels (high 12.7 MJ ME/kg feed, medium 12.0 MJ ME/kg feed and low 11.3 MJ ME/kg feed) with either the inclusion of a β-adrenergic agonist (zilpaterol hydrochloride) at 8.4 g/ton or not. Data were analysed according to a 3 (dietary energy) x 2 (inclusion of a stimulant) x 2 (sex) factorial analysis. No interaction occurred between treatments and the data were presented as the effect of dietary energy level, the inclusion of a stimulant and sex on proximate components...