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| Biassus,Igor de Oliveira; Cobuci,Jaime Araújo; Costa,Claudio Napolis; Rorato,Paulo Roberto Nogara; Braccini Neto,José; Cardoso,Leandro Lunardini. |
| Total numbers of 56,508, 35,091 and 8,326 records of milk, fat, and protein test-day yields, respectively, were used to estimate genetic parameters for six persistency measures on milk, fat and protein productions of Holstein cows reared in Minas Gerais state. Covariance components for additive genetic effects and permanent environmental effects were estimated by REML in random regression models using Legendre polynomials from the third to the sixth order. Overall, models with the highest orders of Legendre polynomials showed the best quality of adjustments of these productive records. Heritability estimates obtained by the models for persistence in milk, fat, and protein yields ranged from 0.04 to 0.32, from 0.00 to 0.23, and from 0.00 to 0.27,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Genetic correlation; Heritability; Legendre polynomials; Random regression model; Selection. |
| Ano: 2010 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982010001200009 |
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| Cardoso,Leandro Lunardini; Braccini Neto,José; Cardoso,Fernando Flores; Cobuci,Jaime Araújo; Biassus,Igor de Oliveira; Barcellos,Júlio Otávio Jardim. |
| It was evaluated statistical models with different assumptions to define the one that best describes the presence of genotype × environment interaction on adjusted post-weaning weight gain (PWG345) of Hereford cattle, through the study of reactions norms to the environment, obtained by random regression using a Bayesian approach. Four reaction norms hierarchical models (RNHM) were used through the INTERGEN program. The RNHM K uses the solutions of contemporary groups previously estimated by the standard animal model (AM) and considers them as environmental level for predicting the reaction norms and the RNHM S, which jointly estimate these two sets of unknowns. For both models, two versions were considered, one with a homogeneous (hm) and another with a... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Adaptability; Bayesian inference; Environmental sensitivity; Genetic evaluation; Random regression. |
| Ano: 2011 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982011000200009 |
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| Dutra Jr.,Wilson Moreira; Ferreira,Aloízio Soares; Urdapilleta Tarouco,Jaime; Donzele,Juarez Lopes; Euclydes,Ricardo Frederico; Albino,Luiz Fernando Teixeira; Cardoso,Leandro Lunardini; Fernandes,Simone dos Passos. |
| Foram utilizadas 48 fêmeas suínas, para se determinar o rendimento de cortes comerciais, após abate e dissecação das carcaças dos animais aos 50, 60, 70, 80, 90, 100, 110 e 120 kg. Foram tomadas medidas ultra-sônicas in vivo para área de olho de lombo e espessura de toucinho. Os preditores utilizados para estimar o rendimento de carne magra foram espessura de toucinho e área de olho de lombo, além das medidas feitas nos diferentes cortes, como peso do corte do pernil, peso do músculo do pernil, peso do músculo da paleta, peso do músculo do carré, peso do músculo da copa, e assim por diante, além dos dados de peso de músculo da carcaça total, peso da gordura da carcaça total, peso de ossos da carcaça total e peso de pele da carcaça total. Foram... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Área de olho de lombo; Cortes comerciais; Espessura de toucinho; Tempo real; Ultra-sonografia. |
| Ano: 2001 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982001000500018 |
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| Dutra Jr.,Wilson Moreira; Ferreira,Aloízio Soares; Urdapilleta Tarouco,Jaime; Euclydes,Ricardo Frederico; Donzele,Juarez Lopes; Lopes,Paulo Sávio; Cardoso,Leandro Lunardini. |
| Foram utilizadas 48 fêmeas suínas abatidas aos 50, 60, 70, 80, 90, 100, 110 e 120 kg para determinar os rendimentos de cortes comerciais e de carne magra na carcaça, visando-se estimar área de olho de lombo (AOL) e espessura de toucinho (ET), utilizando-se a técnica de ultra-sonografia em tempo real. Foram tomadas medidas ultra-sônicas in vivo, para AOL e ET; nas carcaças quentes, utilizou-se equipamento óptico da marca Hennessy, a fim de estimar a ET e profundidade de músculo (PM). As equações para estimar a quantidade de músculo na carcaça obtiveram R² entre 0,97 e 0,99, com desvio-padrão residual entre 0,27 e 0,73. Os valores de R² para área de olho de lombo, por ultra-som e pela medida direta nas carcaças, foram de 0,97 e 0,98, respectivamente, com... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Área de olho de lombo; Cortes cárneos; Equações simples e múltiplas; Espessura de toucinho; Rendimento de carne magra. |
| Ano: 2001 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982001000500017 |
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| Dutra Jr.,Wilson Moreira; Ferreira,Aloízio Soares; Donzele,Juarez Lopes; Euclydes,Ricardo Frederico; Tarouco,Jaime Urdapilleta; Cardoso,Leandro Lunardini. |
| Foram utilizadas 48 fêmeas suínas para se determinarem as curvas de crescimento de tecidos, após abate e dissecação das carcaças dos animais aos 50, 60, 70, 80, 90, 100, 110 e 120 kg. Os cortes realizados nas carcaças foram feitos de acordo com aqueles utilizados pela indústria. Em cada corte, separaram-se as quantidades de músculo, gordura, ossos e pele, para o cálculo de rendimento de tecidos. Foi utilizada a função alométrica estendida, para estimar e ajustar as curvas de crescimento. A quantidade de músculo na carcaça apresentou crescimento variando de 41,9 nos animais de 50 kg, a 44,1%, nos animais de 120 kg. A função alométrica estendida ajustou a curva para quantidade de músculo, com R² = 0,68 e desvio-padrão residual de 1,42. Os valores de R² para... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Cortes cárneos; Curvas de crescimento; Função alométrica estendida; Suínos. |
| Ano: 2001 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982001000400014 |
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| Biassus,Igor de Oliveira; Cobuci,Jaime Araújo; Costa,Claudio Napolis; Rorato,Paulo Roberto Nogara; Braccini Neto,José; Cardoso,Leandro Lunardini. |
| The objective of this study was to estimate genetic parameters for milk, fat and protein yields of Holstein cows using 56,508; 35,091 and 8,326 test-day milk records from 7,015, 4,476 and 1,114 cows, calves of 359, 246 and 90 bulls, respectively. The additive genetic and permanent environmental effects were estimated using REML. Random regression models with Legendre polynomials from order 3 to 6 were used. Residual variances were considered homogeneous over the lactation period. The estimates of variance components showed similar trends, with an increase of the polynomial order for each trait. The heritability estimates ranged from 0.14 to 0.31; 0.03 to 0.21 and 0.09 to 0.33 for milk, fat and protein yield, respectively. Genetic correlations among milk,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Fat yield; Herdability; Milk yield; Protein yield; Test-day. |
| Ano: 2011 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982011000100012 |
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| Devincenzi,Thais; Nabinger,Carlos; Cardoso,Fernando Flores; Nalério,Élen Silveira; Carassai,Igor Justin; Fedrigo,Jean Kássio; Tarouco,Jaime Urdapilleta; Cardoso,Leandro Lunardini. |
| The present study was conducted to assess carcass features, physicochemical and sensory parameters of meat from steers finished on three types of pastures: natural pasture; natural pasture improved, fertilized and oversown with winter species; and annual summer grassland. The experiment was conducted from December 14, 2009 to November 30, 2010, with treatments distributed in a completely randomized design with a different number of replicates. Animals were used as experimental units. Experimental animals were Aberdeen Angus steers with twenty months of initial age and 354±27.4 kg of live weight, on average. The highest average daily gains were obtained for the annual summer grassland. There was no effect of treatments on carcass conformation. The highest... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Average daily gain; Fertilized natural pasture; Sensory panel; Sorghum pasture; Tenderness. |
| Ano: 2012 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982012000400030 |
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| Cardoso,Leandro Lunardini; Tarouco,Jaime Urdapilleta; MacNeil,Michael D.; Lobato,José Fernando Piva; Dambrós,Mara Célia; Freitas,Aline Kellermann de; Devincenzi,Thais; Feijó,Fernanda Dorneles; Cardoso,Fernando Flores. |
| ABSTRACT Two hundred seventeen grass-finished Braford steers were assessed by ultrasonic scanning and subsequently harvested with their pistol hindquarters fabricated into boneless wholesale cuts. The Longissimus thoracis muscle area and subcutaneous fat depths were measured. The objectives of this study were: 1) to develop prediction equations for weights of the pistol hindquarter and high-value commercial cuts, and 2) to estimate sample size needed for experiments comparing pistol hindquarter retail product weight using either physically or ultrasonically measured carcass traits. Carcass measurements explained 44 % to 94 % of the variation in weights of individual cuts, whereas, measurements that were made using ultrasound explained 42 % to 90 % of the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Cattle; Carcass; Models; Ultrasound. |
| Ano: 2020 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162020000400401 |
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