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Registros recuperados: 15
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Avaliação nacional de touros das raças zebuínas - 1975/1986: Gir, Gir variedade mocha, Guzerá, Indubrasil, Nelore, Nelore variedade mocha, Tabapuã. Infoteca-e
ROSA, A. do N.; NOBRE, P.R.C.; EUCLIDES FILHO, K..
Avaliação Nacional de Touros. Descrição da metodologia. Raça Gir. Raca Gir variedade mocha. Raça Guzerá. Raça indubrasil. Raça Nelore. Raça Nelore variedade mocha. Raca Tabapuã.
Tipo: Documentos (INFOTECA-E) Palavras-chave: Gado Zebu; Touro; Melhoramento genético; Brasil; Zebu cattle; Bulls; Breeding methods; Brazil.
Ano: 1987 URL: http://www.infoteca.cnptia.embrapa.br/handle/doc/320370
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Body composition and energy and protein requirements of grazing Nelore steers R. Bras. Zootec.
Almeida,Vitor Visintin Silva de; Queiroz,Augusto César de; Silva,Fabiano Ferreira da; Silva,Robério Rodrigues; Oliveira,Aline Cardoso; Souza,Danilo Ribeiro de.
This experimentwas carried out with the objective of determining the energy and protein requirements of grazing Nellore steers. Twenty four Nellore steers (average 371 ± 14 kg of BW and 26 months old) were used. Four steers were slaughtered at the beginning of the experiment (reference group), serving as a reference for the subsequent study. The remaining 20 animals were weighed and distributed in a randomized complete block design with four levels of supplementation offers: 0.0 (mineral mixture - control), 0.3, 0.6 and 0.9% BW, with five replications. The supplements, based on ground corn, soybean meal and/or urea, were previously balanced to achieve an average daily gain of 350, 650 and 850g, respectively, for the different levels of supplementation...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Energy; Protein; Requirements; Zebu cattle.
Ano: 2009 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982009000700026
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Body composition and net and dietary macrominerals requirements of Nellore steers under grazing R. Bras. Zootec.
Almeida,Vitor Visintin Silva de; Queiroz,Augusto César de; Silva,Robério Rodrigues; Silva,Fabiano Ferreira da; Oliveira,Aline Cardoso; Santana Júnior,Hermógenes Almeida de.
This experiment was carried out with the objective of determining the macrominerals (Ca, P, Mg, K and Na) requirements of Nellore steers under grazing. Twenty four Nellore steers (371 ± 14 kg of BW and 26 mo old) were used. Four steers were slaughtered at the beginning of the experiment (reference group), serving as a reference in subsequent study. The remaining 20 animals were weighed and distributed into a completely randomized design with four supplementation levels offer: 0.0 (mineral mixture - control), 0.3, 0.6 and 0.9% of BW, with five replications. The supplements, based on ground corn, soybean meal and/or urea, were previously balanced to achieve an average daily gain of 350, 650 and 850g, respectively, for the different supplementation levels...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Macrominerals; Pasture; Requirements; Zebu cattle.
Ano: 2009 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982009000600016
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Carcass characteristics of feedlot-finished Zebu and Caracu cattle R. Bras. Zootec.
Resende,Flávio Dutra de; Gesualdi Júnior,Antonio; Queiroz,Augusto César de; Faria,Marcelo Henrique de; Viana,Alexandre Pio.
This study analyzes the chemical carcass characteristics and carcass losses in 86 cattle, both castrated and non-castrated, with an average initial weight of 329 kg and an average age of approximately 20 months, including 12 Gyr, 20 Guzerat, 20 Nellore, and 20 Caracu among the herds selected for weight determination at 378 days of age, as well as 14 Nellore cattle that were not selected. The diet contained a roughage-to-concentrate ratio of 60:40 in terms of dry matter (DM), with 14.8% crude protein as a percentage of DM and corn silage as roughage. A completely randomized 5 × 2 factorial experimental design was used, including five breeds and two sex classes. The following values were determined: losses due to the trimming of commercial cuts and cooking;...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Feedlot; Meat quality; Shear force; Zebu cattle.
Ano: 2014 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982014000200003
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Desempenho reprodutivo de vacas Nelore no Norte e Nordeste do Brasil. Repositório Alice
AZEVÊDO, D. M. M. R.; MARTINS FILHO, R.; LOBO, R. N. B.; MALHADO, C. H. M.; LOBO, R. B.; MOURA, A. de A. A. N.; PIMENTA FILHO, E. C..
Objetivou-se com estre trabalho estimar os parâmetros genéticos e fenotípicos de características reprodutivas de fêmeas de rebanhos das regiões Norte e Nordeste do Brasil. As características estudadas foram idade ao primeiro parto (IPP), intervalo de partos (IDP), período de serviço (PS), número de serviços por concepção (NSC) e período de gestação (PG). Os modelos utilizados para cada característica foram selecionados por meio do procedimento MIXED do programa SAS e os componentes de variância foram estimados pelo método da Máxima Verossimilhança Restrita Livre de Derivada, utilizando-se o software MTDFREML. As médias observadas para IPP, IDP, PS, NSC e PG foram 45,14 +- 10,83 meses; 465,55 +-128,49 dias; 165,76 +- 110,29 dias; 1,34 +- 0,67 serviços e...
Tipo: Artigo em periódico indexado (ALICE) Palavras-chave: Bovino de corte; Eficiência reprodutiva; Parâmetros genéticos; Zebu; Beef cattle; Reproductive efficiency; Genetic parameters; Zebu cattle.
Ano: 2006 URL: http://www.alice.cnptia.embrapa.br/handle/doc/578071
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Efeito da duracao da estacao de monta, idade do bezerro a desmama e uso estrategico de pastagem cultivada sobre a performance reprodutiva de vacas zebu. Infoteca-e
ROCHA, C.M.C. da; MOORE, C.P..
1980
Tipo: Outras publicações técnicas (INFOTECA-E) Palavras-chave: Vaca; Raca; Gado zebu; Reproducao; Eficiencia; Pastagem cultivada; Bezerro; Desmama; Cobricao; Cerrado; Cows; Zebu cattle; Weaning; Calves; Efficiency; Copulation; Sexual reproduction; Sown pastures; Reprodução animal.
Ano: 1980 URL: http://www.infoteca.cnptia.embrapa.br/handle/doc/549351
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Efeito de concentração espermática e período de incubação oócito-espermatozóides na fecundação in vitro em bovinos da raça Gir. Repositório Alice
CAMARGO, L. S. de A.; SÁ, W. F. de; FERREIRA, A. de M.; VIANA, J. H. M.; ARAÚJO, M. C. C..
Avaliou-se o efeito de concentrações espermáticas e períodos de incubação na fecundação in vitro com sêmen de touros Gir (Bos indicus). Oócitos maturados in vitro foram fecundados com sêmen de dois touros, nas concentrações de 1, 2 ou 4x106 espermatozóides/mL, por 12 ou 18 horas, e avaliada a taxa de fecundação e polispermia. Posteriormente, foi avaliada a taxa de clivagem com 72 horas e de blastocisto no oitavo dia pós- fecundação. Um segundo experimento verificou o efeito de 1, 2 e 4x106 espermatozóides/mL por 18 horas, utilizando sêmen de três touros separadamente, bem como o efeito de 12 e 18 horas de incubação, na concentração de 1 a 2x106 espermatozóides/mL. Observou-se maior (P<0,05) polispermia na concentração de 4x106 espermatozóides/mL e que a...
Tipo: Artigo em periódico indexado (ALICE) Palavras-chave: Gado zebu; Sêmen; Fertilidade; Reprodução; Zebu cattle; Semen; Fertility; Reproduction.
Ano: 2002 URL: http://www.alice.cnptia.embrapa.br/handle/doc/107333
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Efeito de diferentes idades a desmama na performance de vacas zebu adultas alimentadas com dois niveis de energia. Infoteca-e
MOORE, C.P.; ROCHA, C.M.C. da; VIANNA, J.H.U..
1980
Tipo: Outras publicações técnicas (INFOTECA-E) Palavras-chave: Vaca; Raca zebu; Desmama; Idade; Nutricao animal; Dieta; Cerrado; Cows; Zebu cattle; Weaning; Diet; Animal feeding.
Ano: 1980 URL: http://www.infoteca.cnptia.embrapa.br/handle/doc/549348
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Genetic analysis of oocyte and embryo production traits in Guzerá breed donors and their associations with age at first calving. Repositório Alice
PEREZ, B. C.; PEIXOTO, M. G. C. D.; BRUNELI, F. A. T.; RAMOS, P. V. B.; BALIEIRO, J. C. C..
Abstract: The objective of this study was to estimate variance components for oocyte and embryo production traits in Guzerá breed female donors, and investigate their associations with age at first calving (AFC). The traits analyzed were the number of viable oocytes (NOV), the number of grade I oocytes (NGI), the number of cleaved embryos (NCLV), and viable embryos produced (NEMB), and the percentages of viable oocytes (POV), grade I oocytes (PGI), cleaved embryos (PCLV), and viable embryos (PEMB). Data were obtained from 5173 ovary puncture and in vitro fertilization (IVF) sessions using 1080 Guzerá female donors of different ages, occurred from March 2005 to July 2013. Variables were log-transformed (logeX+1) prior to analysis. (Co)variance components...
Tipo: Artigo em periódico indexado (ALICE) Palavras-chave: Bivariate analysis; Genetic parameter; In vitro fertilization; Ovum pick-up; Permanent environment; Zebu cattle.
Ano: 2016 URL: http://www.alice.cnptia.embrapa.br/handle/doc/1061463
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Macro mineral requirements by grazing zebu bovines R. Bras. Zootec.
Moraes,Eduardo Henrique Bevitori Kling de; Paulino,Mário Fonseca; Moraes,Kamila Andreatta Kling de; Valadares Filho,Sebastião de Campos; Lazzarini,Isis; Monnerat,João Paulo Ismério dos Santos; Couto,Victor Rezende Moreira; Souza,Marcos Gonçalves de.
The objective of this study was to determine requirements of calcium (Ca), phosphorus (P), magnesium (Mg), potassium (K) and sodium (Na) for grazing zebu bovines. The experiment area was composed of Brachiaria decumbens paddocks. Twenty-seven non-castrated animals, with initial live weight of 311.0 kg and at an average age of 14 months were used. Three animals were slaughtered, after adaptation period, so they were used as control for estimates of empty body weight and initial body composition of animals in the experiment. Out of the 24 remaining animals, four were sent to the maintenance group with restrict grazing time to limit energy intake close to the maintenance level. The other 20 animals were distributed in four treatments: mineral mixture,...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Macro minerals; Pasture; Requirement; Zebu cattle.
Ano: 2012 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982012000200023
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Net requirements of energy, protein and macrominerals for weight gain of grazing beef cattle castrated at different ages, with and without supplementation R. Bras. Zootec.
Rocha,Anilza Andréia da; Paulino,Mário Fonseca; Fernandes,Henrique Jorge; Barros,Lívia Vieira de; Lopes,Sidnei Antonio; Galon,Leandro; Silva,Aline Gomes da; Almeida,Daniel Mageste de.
The objective of this experiment was to estimate the requirements of energy, protein and macrominerals of grazing crossbreds calves, in Brachiaria decumbens Stapf pasture, castrated at different ages, with and without supplementation. Forty-seven young calves at initial age of 120±30.1 days and 115.3±1.97 kg of live weight were used. To estimate net energy requirements for weight gain, a regression equation between energy retained in the gain and empty body weight gain and metabolic empty body weight was obtained. For estimation of net protein requirements for weight gain, a regression equation was adjusted between protein retained in gain and empty body weight gain and energy content of this gain. Net requirements of Ca, P, Mg and Na for weight gain were...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Castration; Supplementation; Zebu cattle.
Ano: 2012 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982012000200025
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Performance and carcass traits of Nellore and Red Norte steers finished in feedlot R. Bras. Zootec.
Machado Neto,Otávio Rodrigues; Ladeira,Márcio Machado; Gonçalves,Tarcisio de Moraes; Lopes,Leandro Sâmia; Oliveira,Dalton Mendes de; Lima,Renato Ribeiro de.
The objective of this work was to evaluate average daily gain (ADG) and carcass traits in Nellore and Red Norte steers, finished in feedlots and to evaluate performance predictions by using the systems BR-CORTE, CNCPS 5.0 and NRC (2000). It was used 41 steers: 19 Nelore animals with initial body weight of 361 ± 31 kg and 22 Red Norte animals with initial body weight of 367 ± 30 kg. Adaptation period lasted 28 days. Animal performance evaluation was composed of three 28 day period, totaling 84 days. At the end of each period, animals were weighed after a 16-hour feeding fast. Average gain weight of Red Norte steers was greater than Nellore breed animals (1.43 vs. 1.81 kg/day, respectively). Red Norte animals also presented greater loin eye area (75.41 cm²...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Composite breeds; Markers; Nutritional requirements; Prediction equations; Zebu cattle.
Ano: 2011 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982011000500020
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Reaction norms models in the adjusted weight at 550 days of age for Polled Nellore cattle in Northeast Brazil R. Bras. Zootec.
Ambrosini,Diego Pagung; Carneiro,Paulo Luiz Souza; Braccini Neto,José; Martins Filho,Raimundo; Amaral,Rosimira dos Santos; Cardoso,Fernando Flores; Malhado,Carlos Henrique Mendes.
The objective of this study was to evaluate the genotype-environment interaction (GEI) in the body weight adjusted to 550 days of age (W550) of Polled Nellore cattle raised in Northeastern Brazil using reaction norms (RN) models. Hierarchical RN models included fixed effects for age of cow (linear and quadratic) and random effects for contemporary groups (CG) and additive genetic RN level and slope. Four RN hierarchical models (RNHM) were used. The RNHM2S uses the solutions of contemporary groups estimated by the standard animal model (AM) and considers them as environmental level for predicting the reaction norms and the RNHM1S, which jointly estimate these two sets of unknowns. Two versions were considered for both models, one with a homogeneous (Hm) and...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Bayesian inference; Environmental gradient; Genetic value; Random regression; Zebu cattle.
Ano: 2014 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982014000700351
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Selection for higher body weight in Nelore cattle is effective in achieving an increase of longissimus muscle area without reducing subcutaneous fat thickness R. Bras. Zootec.
Pinheiro,Tiago Roque; Mercadante,Maria Eugênia Zerlotti; Albuquerque,Lucia Galvão de; Bonilha,Sarah Figueiredo Martins; Monteiro,Fábio Morato.
The objectives of this study were to estimate heritabilities and genetic and phenotypic correlations between carcass traits measured by ultrasound and other economically important traits generally used as selection criteria in beef cattle and to estimate the genetic changes in the carcass traits as a result of selection for post-yearling weight. Carcass traits measured by ultrasound at two ages (12 and 18 months) and the correlation of these traits with weight, hip height and body condition score of males (yearling) and females (post-yearling) were analyzed. Multi-trait analysis was performed using the restricted maximum likelihood method under an animal model. To demonstrate the effect of selection for growth, phenotypic and expected breeding value means...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Carcass traits; Correlated responses; Genetic correlation; Ultrasound; Zebu cattle.
Ano: 2012 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982012000600016
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Supplementation levels for growing beef cattle grazing in the dry-rainy transition season R. Bras. Zootec.
Sales,M.F.L.; Paulino,M.F.; Valadares Filho,S.C.; Figueiredo,D.M.; Porto,M.O.; Detmann,E..
The objective of this experiment was to study the effects of different levels of supplementation on the performance, intake, digestibility, pH and rumen ammonia concentration in growing bulls grazing Brachiaria decumbens Stapf. pasture, during the dry-rainy transition season. For evaluation of performance, intake and digestibility, it was used 25 non-castrated steers at 11 months of age and initial average body weight of 270 kg, grouped in five plots of five animals each, following a completely randomized design. Each plot received one of the following feeding treatments: mineral mixture and supplement at the proportion of 0.5, 1.0, 1.5 and 2.0 kg/animal/day, corresponding to 0.18, 0.36, 0.54 and 0.72% of the average body weight of the animals. The area...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Beef cattle; Digestibility; Intake; Multiple supplements; Zebu cattle.
Ano: 2011 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982011000400027
Registros recuperados: 15
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