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| Registros recuperados: 72 | |
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| Borges,Bárbara Oliveira; Curi,Rogério Abdallah; Baldi,Fernando; Feitosa,Fabieli Loise Braga; Andrade,Willian Bruno Fernandes de; Albuquerque,Lucia Galvão de; Oliveira,Henrique Nunes de; Chardulo,Luis Artur Loyola. |
| The objective of this work was to estimate the allele polymorphism frequencies of genes in Nellore cattle and associate them with meat quality and carcass traits. Six hundred males were genotyped for the following polymorphisms: DGAT1 (VNTR with 18 nucleotides at the promoter region); ANK1, a new polymorphism, identified and mapped here at the gene regulatory region NW_001494427.3; TCAP (AY428575.1:g.346G>A); and MYOG (NW_001501985:g.511G>C). In the association study, phenotype data of hot carcass weight, ribeye area, backfat thickness, percentage of intramuscular fat, shear force, myofibrillar fragmentation index, meat color (L*, a*, b*), and cooking losses were used. Allele B from the ANK1 gene was associated with greater redness (a*). Alleles 5R,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Bos indicus; Ankyrin; Assisted selection; Beef cattle; Myogenin; Titin. |
| Ano: 2014 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2014000500364 |
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| Ortega Navarro, Gilberto Carlos. |
| El presente estudio comprendió tres etapas, que consistieron en 1 (Capítulo 1), desarrollar un modelo para predecir la ganancia de peso vivo vacío (GPV) de toros pastoreando praderas en zonas tropicales con y sin complemento alimenticio (MCPV); 2 (Capítulo 2), realizar un análisis de sensibilidad del modelo desarrollado descrito en el capítulo dos, utilizando las técnicas uno a la vez y multi pasos, y 3 (Capítulo 3), realizar un análisis comparativo de las predicciones de ganancia de peso de toros ayunados (GPAp) utilizando el MCPV y modelo del NRC, éste último, considerando la energía metabolizable (MNRC EM) y proteína metabolizable (MNRC PM). En el capítulo uno, se describe el procedimiento que se siguió para la construcción del modelo, utilizando las... |
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Palavras-chave: Bos indicus; Tropical; Energía; Sensible; Magnitud de entrada; NRC; Energy; Input magnitude; Doctorado; Ganadería. |
| Ano: 2011 |
URL: http://hdl.handle.net/10521/524 |
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| Ortega Navarro, Gilberto Carlos. |
| El presente estudio comprendió tres etapas, que consistieron en 1 (Capítulo 1), desarrollar un modelo para predecir la ganancia de peso vivo vacío (GPV) de toros pastoreando praderas en zonas tropicales con y sin complemento alimenticio (MCPV); 2 (Capítulo 2), realizar un análisis de sensibilidad del modelo desarrollado descrito en el capítulo dos, utilizando las técnicas uno a la vez y multi pasos, y 3 (Capítulo 3), realizar un análisis comparativo de las predicciones de ganancia de peso de toros ayunados (GPAp) utilizando el MCPV y modelo del NRC, éste último, considerando la energía metabolizable (MNRC EM) y proteína metabolizable (MNRC PM). En el capítulo uno, se describe el procedimiento que se siguió para la construcción del modelo, utilizando las... |
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Palavras-chave: Bos indicus; Tropical; Energía; Sensible; Magnitud de entrada; NRC; Energy; Input magnitude; Doctorado; Ganadería. |
| Ano: 2011 |
URL: http://hdl.handle.net/10521/524 |
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| Silva,Saulo da Luz e; Tarouco,Jaime Urdapilleta; Ferraz,José Bento Sterman; Gomes,Rodrigo da Costa; Leme,Paulo Roberto; Navajas,Elly Ana. |
| The objective of this study was to develop equations to predict retail product and fat trim (weights and percentages) for Nellore (Bos indicus) cattle. Live ultrasound measurements of the longissimus muscle area, backfat thickness at the 12th rib and rump fat depth and shrunk body weight were obtained from 218 Nellore steers to predict weights and percentages of carcass retail product, pistola retail product and fat trimmings. After slaughter, carcasses were deboned and weighed and percentages of retail cuts were obtained directly. Measurements taken directly in the carcasses explained 97% and 36% of variation in carcass retail product weight and percentage, and 94% and 36% of variation in pistola retail weight and percentage, respectively. Live... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Beef; Bos indicus; Fat; Retail product; Ultrasound. |
| Ano: 2012 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982012000900009 |
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| Vaz,Fabiano Nunes; Restle,João; Feijó,Gelson Luis Dias; Brondani,Ivan Luiz; Rosa,Joilmaro Rodrigo Pereira; Santos,Angélica Pereira dos. |
| Utilizaram-se 70 bovinos machos de três sistemas de acasalamento, puros Charolês (Ch) e Nelore (Ne), mestiços G1: 1/2 Ch + 1/2 Ne (1/2 Ch) e 1/2 Ne + 1/2 Ch (1/2 Ne) e mestiços G2: 3/4 Ch + 1/4 Ne (3/4 Ch) e 3/4 Ne + 1/4 Ch (3/4 Ne). O número de animais por grupo genético foi, respectivamente, 15, 12, 8, 12, 14 e 9. Trinta e cinco animais foram castrados (C) aos sete meses e 35 foram mantidos inteiros (I). Os animais foram confinados dos 20 aos 24 meses, quando foram abatidos. Para avaliação da carne, foi utilizado o músculo longissimus dorsi. Não houve interação significativa entre grupo genético e estado sexual para nenhuma das variáveis estudadas. Os machos I apresentaram carne mais escura (3,05 contra 3,78 pontos) com menor marmoreio (4,26 contra 5,75... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Bos indicus; Bos taurus; Castração; Heterose; Maciez; Marmoreio. |
| Ano: 2001 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982001000200031 |
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| Peixoto,Maria Gabriela Campolina Diniz; Santos,Daniel Jordan de Abreu; Borquis,Rusbel Raul Aspilcueta; Bruneli,Frank Ângelo Tomita; Panetto,João Cláudio do Carmo; Tonhati,Humberto. |
| The objective of this work was to compare random regression models for the estimation of genetic parameters for Guzerat milk production, using orthogonal Legendre polynomials. Records (20,524) of test-day milk yield (TDMY) from 2,816 first-lactation Guzerat cows were used. TDMY grouped into 10-monthly classes were analyzed for additive genetic effect and for environmental and residual permanent effects (random effects), whereas the contemporary group, calving age (linear and quadratic effects) and mean lactation curve were analized as fixed effects. Trajectories for the additive genetic and permanent environmental effects were modeled by means of a covariance function employing orthogonal Legendre polynomials ranging from the second to the fifth order.... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Bos indicus; Covariance functions; Lactation curve; Test-day model. |
| Ano: 2014 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2014000500372 |
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| Scalez,Daiane Cristina Becker; Fragomeni,Breno de Oliveira; Santos,Dalinne Chrystian Carvalho dos; Passafaro,Tiago Luciano; Alencar,Maurício Mello de; Toral,Fabio Luiz Buranelo. |
| ABSTRACT The objective of this study was to estimate genetic parameters for body weight of beef cattle in performance tests. Different random regression models with quadratic B-splines and heterogeneous residual variance were fitted to estimate covariance functions for body weights of Nellore and crossbred Charolais × Nellore bulls. The criteria −2 residual log-likelihood (−2RLL), Akaike Information Criterion (AIC), and consistent AIC (CAIC) were used to choose the most appropriate model. For Nellore bulls, residual variance was modeled with six classes of age, and direct additive genetic and permanent environment effects were modeled with quadratic B-splines with two and one intervals, respectively. For crossbred bulls, quadratic B-splines with one... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Animal breeding; Bos indicus; Genetic correlation; Heritability. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982018000100407 |
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| Favero,R.; Mizubuti,I.Y.; Gomes,R.C.; Ribeiro,E.L.A.; Pereira,E.S.; Prado-Calixto,O.P.P.; Massaro Júnior,F.L.; Santos,A.P.S.. |
| ABSTRACT The present study aimed to evaluate the feedlot performance, profitability and carcass traits of Brahman bulls classified according to the residual feed intake (RFI). Twenty-four bulls (19-month old, 370±34kg live weight) were housed in individual pens for 54 days and had the daily feed intake (observed dry matter intake, DMIobs; DMI % live weight, LW) and average daily gain (ADG) measured. Ultrasound carcass evaluations were performed at the initial and final weighings, when measurements were taken of Longissimus dorsi area, ratio, Longissimus and Biceps femoris fat thickness. The animals were ranked and divided into high (>+0.5 standard deviation; SD), medium (between ±0.5 SD from the mean), and low (<-0.5 SD) RFI groups. Low-RFI animals... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Bos indicus; Feed conversion ratio; Musculature; Phenotype. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-09352018000200525 |
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| Aquino Luque,Maria Carolina; Báo,Sônia Nair. |
| The ultrastructure of normal, ejaculated spermatozoa of Bos indicus was studied by means of electron microscopy, being evaluated in two principal parts, the head and the tail. The head is flat, oval or paddle-shaped with a square base, which provides a concave recess for the insertion of the tail. The acrosome tightly covers the anterior two thirds of the nucleus. A distinct unilateral acrosomal bulge was observed along the apical edge of the head. The equatorial region demarcates the acrosome from the post-equatorial region that covers the caudal one third of the nucleus. The classical 9+9+2 fiber pattern which composes the axoneme was observed along three segments of the tail, namely middle, principal and terminal pieces. The axoneme is anteriorly bound... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Spermatozoon; Ultrastructure; Bos indicus. |
| Ano: 2006 |
URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S0327-95452006000100005 |
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| Restle,João; Quadros,Arlei Rodrigues Bonnet de; Vaz,Fabiano Nunes. |
| RESUMO - Este experimento foi realizado para avaliar o desempenho em confinamento, durante a terminação, de novilhos de genótipos 100% Hereford (H), 62% H 38% Nelore (N), 50% H 50% N e 25% H 75% N. Vinte e quatro novilhos, com idade inicial de 20 meses, confinados por 126 dias foram usados. A dieta alimentar continha, na base matéria seca (MS), 12,7% de proteína bruta e foi composta de 57,5% de volumoso e 42,5% de concentrado. O volumoso foi composto de silagem de milho + cana-de-açúcar (relação 1:1). A regressão foi significativa para ganho de peso médio diário (<IMG SRC="/img/revistas/rbz/v29n1/5726fr2.gif" > ou = 0,55958 + 0,01978X - 0,00013X²; r²=0,8031; P<0,0303), consumo médio diário de MS (<IMG SRC="/img/revistas/rbz/v29n1/5726fr2.gif"... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Bos indicus; Bos taurus; Cruzamento; Desempenho. |
| Ano: 2000 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982000000100017 |
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| Koivisto,Marion Burkhardt; Luvizotto,Maria Cristina Rui; Nogueira,Guilherme Padua; Vicente,Wilter Ricardo Russiano; Costa,Marcelo Tadeu Alvarenga. |
| A bovine, Bos indicus, with bilateral varicocele diagnosticed by palpation and ultrasound observation was observed during 24 months measuring scrotal circumference, semen quality, testosterone concentrations comparing with seasonal variation and other animals of the same species. The abnormal morphology of major defects and minor defects didn't change between the bull and the other animals, however, the total defects were higher during the summer in the bull with varicocele (49,9%±6,9) when compared with the other bulls (27,9%±2,9). The animal showed higher percentage of major defects during the summer, comparing with the other seasons of the year. For the animal with varicocele testosterone levels were significantly higher during the different season's of... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Varicocele; Bovine; Semen; Testosterone; Bos indicus. |
| Ano: 2002 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-95962002000100005 |
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| Registros recuperados: 72 | |
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