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| Silveira,Fernanda Gomes da; Duarte,Darlene Ana Souza; Chaves,Lucas Monteiro; Silva,Fabyano Fonseca e; Filho,Ivan Carvalho; Duarte,Marcio de Souza; Lopes,Paulo Sávio; Guimarães,Simone Eliza Facioni. |
| ABSTRACT: The main application of genomic selection (GS) is the early identification of genetically superior animals for traits difficult-to-measure or lately evaluated, such as meat pH (measured after slaughter). Because the number of markers in GS is generally larger than the number of genotyped animals and these markers are highly correlated owing to linkage disequilibrium, statistical methods based on dimensionality reduction have been proposed. Among them, the partial least squares (PLS) technique stands out, because of its simplicity and high predictive accuracy. However, choosing the optimal number of components remains a relevant issue for PLS applications. Thus, we applied PLS (and principal component and traditional multiple regression)... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: SNP; Genomic prediction; Meat quality. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782017000100652 |
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| Oliveira,Ivanna Moraes de; Paulino,Pedro Veiga Rodrigues; Marcondes,Marcos Inácio; Valadares Filho,Sebastião de Campos; Cavali,Jucilene; Prados,Laura Franco; Duarte,Marcio de Souza; Detmann,Edenio. |
| This trial was conducted to evaluate some beef quality attributes of Nellore, F1 Simmental × Nellore and F1 Angus × Nellore steers finished on feedlot. The effects of feeding regime and genetic group on shear force, thawing losses, cooking (leak + evaporation) losses, total losses and muscle fiber type, as well as carcass pH and temperature during 24 h of chilling were evaluated. There was a genetic group effect on shear force, where the beef from F1 Simmental × Nellore and F1 Angus × Nellore animals had lower values than Nellore animals. Beef of the animals fed the diets with 1% and 2% of body weight on concentrated lost more liquid than the meat of the animals fed at maintenance during thawing and when considering total losses. During cooking there was a... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Beef quality; Muscular fibers; Shear force. |
| Ano: 2011 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982011001200037 |
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| Oliveira,Ivanna Moraes de; Paulino,Pedro Veiga Rodrigues; Marcondes,Marcos Inácio; Valadares Filho,Sebastião de Campos; Detmann,Edenio; Cavali,Jucilene; Duarte,Marcio de Souza; Mezzomo,Rafael. |
| Sixty 18-month-old steers (20 Nellore, 20 F1 Simmental × Nellore and 20 F1 Angus × Nellore with average body weight of 265.6±6.4 kg; 325.3±4.7 kg and 324.6±6.0 kg, respectively) were used. The effects of feeding regime and genetic group on physical carcass composition, empty body composition, composition of the gain, as well as the pattern of tissue deposition were evaluated in this trial. The interaction between genetic group and feeding regime was not significant for any variable evaluated. Animals fed at the maintenance level produced carcass with larger proportions of bones and muscle than the animals fed ad libitum and Nellore animals had larger muscle portion and smaller adipose tissue portion on the carcass than the crossbred animals. Nellore... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Empty body gain; Physical gain composition; Visceral fat. |
| Ano: 2011 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982011001200036 |
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| Oliveira,Ivanna Moraes de; Paulino,Pedro Veiga Rodrigues; Valadares Filho,Sebastião de Campos; Detmann,Edenio; Paulino,Mário Fonseca; Gomide,Lúcio Alberto de Miranda; Duarte,Marcio de Souza; Couto,Victor Rezende Moreira. |
| This trial was conducted to evaluate the quantitative carcass traits of Nellore, F1 Simmental × Nellore and F1 Angus × Nellore steers fed at maintenance level or ad libitum with 1% and 2% of the body weight in concentrate. The animals were allotted to the treatments in a completely randomized experimental design, in a 3 × 3 factorial arrangement. The animals fed the ad libitum diet with more concentrate had greater cold carcass weight, cold carcass yield and longissimus muscle area/100 kg of cold carcass weight when compared with animals fed the diet with low concentrate allowance. There was no difference between the ad libitum diets for all of the carcass cuts yields, except for top sirloin. Crossbred animals had cold carcass yield larger than the Nellore... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Carcass yield; Longissimus muscle area; Tissue deposition. |
| Ano: 2011 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982011001200042 |
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