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| Registros recuperados: 26 | |
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| SILVA, F. L. R. da; ARAÚJO, A. M. de. |
| Resumo: Avaliou-se a producao media diaria de leite de cabras do grupo genetico tricross da Embrapa Caprinos, durante quatro anos, num total de 680 lactacoes. O rebanho foi mantido em pastagem nativa com suplementacao mineral durante o ano, porem na epoca seca, o rebanho recebeu volumoso de silagem de sorgo, e concentrado a base de milho com farelo de soja. O rebanho tricross foi submetido a tres estacoes de monta por ano. O controle leiteiro foi feito uma vez por semana, de manha e a tarde. O trabalho teve como objetivo determinar as caracteristicas produtivas de leite de cabras Tricross(F1) e suas bimesticas(F2). As matrizes tricross(F2) foram 40% e 23% inferiores as tricross(F1), para a producao total de leite e producao media diaria, respectivamente, e... |
| Tipo: Circular Técnica (INFOTECA-E) |
Palavras-chave: Brasil; Ceará; Hybrid vigour.; Crossbreeding; Caprino; Cabra; Melhoramento genético animal; Cruzamento; Produção leiteira; Vigor híbrido; Goats; Genetic improvement; Milk production; Heterosis.. |
| Ano: 1999 |
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/515303 |
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| EUCLIDES FILHO, K.. |
| Entre as grandes mudanças que vem ocorrendo no mundo nos últimos anos destaca-se o estabelecimento de um mercado onde as demandas não são mais estabelecidas por diferenças de renda entre os diversos segmentos da sociedade, mas sim por exigências quando a qualidade de vida e bem-estar, associado a qualidade de produto e baixo custo. Esta transformação no mercado deve-se a onda de globalização que vem varrendo o mundo, e que não so agita a economia, mas modifica padrões e conhecimentos, estabelecendo, com isto, um novo status de cultura global. Neste contexto, todo e qualquer setor produtivo necessita adequar-se para sobreviver. Dentro da cadeia produtiva da carne destaca-se a necessidade de ajustes nos sistemas de produção. Neste particular, o cruzamento... |
| Tipo: Documentos (INFOTECA-E) |
Palavras-chave: Bovino de corte; Melhoramento genético; Brasil; Crossbreeding; Selection.; Bos Taurus; Bos Indicus; Cruzamento; Seleção.; Beef cattle; Brazil; Breeding.. |
| Ano: 1997 |
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/322461 |
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| de la Barra,R; Martínez,M. E; Carvajal,A. |
| The body shape of an animal population determines ranges of biological functionality and productive use. In sheep, meat productivity is closely related with the body size of the animal. Some sheep breeds are used in terminal crossbreeding to give the lamb favorable dimensional characteristics, but it is necessary to go deeper on the study of the relationships between morphostructure and productive aptitude of these breeds, since discrepancies could be due to the environmental effects or the degree of differentiation between the original pool of different breeds and the local populations. The study aimed to evaluate the morphostructural characters in four sheep breeds in Chile and discuss their relationship with the productive functionality of the body... |
| Tipo: Journal article |
Palavras-chave: Zoometry; Crossbreeding; Sheep. |
| Ano: 2016 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022016000300024 |
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| Petrini,Juliana; Dias,Raphael Antonio Prado; Pertile,Simone Fernanda Nedel; Eler,Joanir Pereira; Ferraz,José Bento Sterman; Mourão,Gerson Barreto. |
| The objective of this work was to assess the degree of multicollinearity and to identify the variables involved in linear dependence relations in additive-dominant models. Data of birth weight (n=141,567), yearling weight (n=58,124), and scrotal circumference (n=20,371) of Montana Tropical composite cattle were used. Diagnosis of multicollinearity was based on the variance inflation factor (VIF) and on the evaluation of the condition indexes and eigenvalues from the correlation matrix among explanatory variables. The first model studied (RM) included the fixed effect of dam age class at calving and the covariates associated to the direct and maternal additive and non-additive effects. The second model (R) included all the effects of the RM model except the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Bos taurus x Bos indicus; Animal breeding; Beef cattle; Correlation matrix; Crossbreeding; Variance inflation factor. |
| Ano: 2012 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2012001200010 |
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| Costa,Patrícia Monteiro; Barbosa,Fabiano Alvim; Alvarenga,Ramon Costa; Guimarães,Sérgio Teixeira; Lampeão,Ângelo André; Winkelströter,Larissa Kretli; Maciel,Isabella Cristina de Faria. |
| Abstract: The objective of this work was to evaluate the performance of crossbred steers post-weaned in an integrated crop-livestock system (ICL) and finished in a feedlot, fed either a high-level concentrate diet or whole corn with no roughage. Weaned calves of two breed groups - ½ Angus × ½ Nellore, and ½ Charolais × ¼ Angus × ¼ Nellore - were allotted in a completely randomized experimental design (CRD). During the rainy season, the ½ Angus × ½ Nellore animals showed a higher performance than the ½ Charolais × ¼ Angus ×¼ Nellore ones, with 0.748 and 0.490 kg average daily gain, respectively. The productivity in the post-weaning period was 926 kg ha-1 body weight in a 11-month period, in the ICL system. Subsequently, the animals were confined and fed... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Beef cattle; Crossbreeding; Feed intake; Integrated systems; Intensification.. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2017000500355 |
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| Prestes,Alan Miranda; Oliveira,Mauricio Morgado de; Mello,Fernanda Cristina Breda; Rorato,Paulo Roberto Nogara; Lopes,Jader Silva; Feltes,Giovani Luis; Bravo,André Padilha. |
| Abstract: The objective of this work was to identify the most suitable model for the genetic evaluation of post-weaning weight gain in a multibreed Angus-Nelore population. Three models were tested using the Bayesian inference method: traditional animal model (M1), multibreed animal model without (M2) and with segregation (M3). The choice of the best model followed the criteria: number of parameters (Np), deviance information criterion (DIC), conditional predictive ordinate (CPO), and deviance based on Bayes factors. Spearman’s rank correlations were estimated for the top 10, 20, and 30% sires. M1 presented the highest values for all criteria, except for Np, and the lowest direct heritability estimate of 0.15±0.01. The heritability estimates for M2 and M3... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Animal breeding; Crossbreeding; Dominance; Epistatic losses; Genetic parameters. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2019000102803 |
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| Huang,Ai-xia; Li,Jin-jun; Shen,Jun-da; Tao,Zheng-rong; Ren,Jin-dong; Li,Guo-qing; Wang,De-qian; Tian,Yong; Yang,Fu-sheng; Ding,Wei-ping; Wu,Tian-xing; Lu,Li-zhi. |
| We investigated the effects of crossbreeding on slaughter traits and the chemical composition of chicken breast muscle. Trials were conducted using 120 broilers from four lines: Xiao-Shan chicken (XS), Xian-Ju chicken (XJ), Xiao-Shan chicken♂♂ × Xian-Ju chicken♀♀ (Zhenan 1, ZNY1) and Xiao-Shan chicken♂♂ × (Guang-Xi Yellow chicken♂♂×Xian-Ju chicken♀♀) ♀♀ (Zhenan 2, ZNY2). The birds were slaughtered at 120 days of age and the slaughter traits were measured. Breast muscles were sampled to determine chemical composition. The slaughter traits of hybrid chickens were improved. Both hybrid strains had higher intramuscular fat (IMF) and inosine-5'-monophosphate (inosinic acid, IMP). Concentrations of monounsaturated fatty acids (MUFA) in breast muscles from the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Amino acid; Chicken; Crossbreeding; Fatty acid; Inosine-5'-monophosphate; Intramuscular fat; Slaughter traits. |
| Ano: 2011 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2011000400005 |
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| Machado Neto,Otávio Rodrigues; Ladeira,Márcio Machado; Gonçalves,Tarcisio de Moraes; Lopes,Leandro Sâmia; Oliveira,Dalton Mendes de; Bassi,Marcelo Silva. |
| The objective of this research was to evaluate the dry matter intake (DMI) and nutrient consumption in Nellore and Red Norte steer finished in a feedlot and compare the actual and predicted values by NRC (2000), CNCPS 5.0 and BR-CORTE systems. Forty-one animals, 19 Nellore and 22 Red Norte steers, with initial live weight of 361 ± 31 kg and 367 ± 30 kg, respectively, were used. The experiment lasted 84 days, with 28 days for adaptation and 56 experimental days. The animals were weighed at the beginning and at end of each 28-day period after 16 hours fasting. The dry matter intake was estimated by LIPE, chrome oxide and indigestible dry matter (DMi) markers. There were no differences between Nellore and Red Norte DMI when expressed in kg/day (10.66 vs.... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Crossbreeding; Markers; Nutritional requirements; Zebu breeds. |
| Ano: 2010 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982010000200024 |
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| Carvalho,Geraldo Magela Côrtes; Frota,Marcílio Nilton Lopes da; Lima Neto,Anisio Ferreira; Azevêdo,Danielle Maria Machado Ribeiro; Araujo Neto,Raimundo Bezerra de; Araujo,Adriana Mello de; Pereira,Elzânia Sales; Carneiro,Maria Socorro de Souza. |
| ABSTRACT The objective of this study was to evaluate live weight and carcass traits, from birth to slaughter, and meat quality of Nellore (NEL), Curraleiro Pé-Duro (CPD), and crossbred (F1) products in the state of Piauí, Brazil. Progenies from CPD, NEL, and their F1 crossbred (½ NEL + ½ CPD), a total of 252, males and females, from birth to 24 months of age, were evaluated in a comparative study in growth performance. The steers were sent to slaughter at 28 months of age and carcasses and meat quality were analyzed. After slaughter, carcass weight, dressing percentage and Longissimus dorsi area (rib eye area) were evaluated; an index was created by the relationship between these measures per hundred kg of chilled carcass produced. To assess meat quality,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Beef cattle; Crossbreeding; Heterosis; Meat quality; Local breeds; Tropically adapted. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982017000500393 |
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| Venturini,Tiago; Menezes,Luís Fernando Glasenapp de; Kuss,Fernando; Martin,Thomas Newton; Vonz,Douglas; Paris,Wagner. |
| In order to evaluate the effect of the different percentages of zebu blood in the genotype of crossbred steers on carcass traits, a meta-analysis was carried out, using 30 studies conducted in Brazil that have been published since the year 2000. The parameters evaluated were hot carcass weight (221 estimates), cold carcass weight (232), hot carcass (236) and cold carcass yield (223), subcutaneous fat thickness (238) and the percentages of saw cut (233), forequarter (234) and sidecut (246 estimates). Initially, exploratory analysis was performed for each of the variables for detection of publication vices through the dispersion of observations by pointing out the outliers eliminated. Normality tests were normal and the data were subjected to analysis of... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Carcass yield; Crossbreeding; Heterosis. |
| Ano: 2011 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982011001100041 |
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| Vargas Junior,Fernando Miranda de; Wechsler,Francisco Stefano; Rossi,Patrícia; Oliveira,Marcus Vinicius Morais de; Schmidt,Patrick. |
| This trial aimed to investigate the influence of calf genetic group on the ingestive behavior of Nellore dams and their offspring on pasture. Twenty one primiparous and multiparous Nellore cows were assigned to the experiment; 13 cows nursed straightbred Nellore calves; and eight cows nursed halfbred Simmental × Nellore calves. The observations started in the morning, as soon as identification of the animals in daylight was possible, and they lasted until after sunset, when identification became impossible. The observations were made at 3, 6, 12, 24 and 30 weeks after calving. The following events were continuosly observed: grazing, rumination, idleness, water and mineral intake, and suckling frequency and length.. The dams of straightbreds showed a... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Crossbreeding; Grazing; Idleness; Rumination; Suckling. |
| Ano: 2010 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982010000300026 |
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| Ribeiro,Edson Luis de Azambuja; Pires,Cleber Cassol; Mizubuti,Ivone Yurika; Silva,Leandro das Dores Ferreira da; Castro,Filipe Alexandre Boscaro de; Koritiaki,Natália Albieri; Pereira,Elzânia Sales; Pinto,Andréa Pereira. |
| The objective of this study was to evaluate the characteristics of wool produced by ewes of different genetic groups, ages, and reproductive statuses. A total of 115 ewes, of the following genetic groups, were used: 10 Corriedale, 37 Hampshire Down, 26 1/2 Hampshire Down + 1/2 Corriedale, 24 1/2 Ile de France + 1/2 Corriedale, and 18 1/2 Suffolk + 1/2 Corriedale. Age was determined by the number of permanent incisors, ranging from four teeth to eight teeth. Ewes were further classified by their reproductive status into: lambed, having reared one lamb; and not-lambed. Hampshire and half-blood Suffolk ewes were heavier (53.2 and 52.7 kg, respectively), while Corriedale animals were lighter (40.1 kg). Older ewes and not-lambed ewes were heavier as well.... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Crossbreeding; Fiber; Ovis aries; Sheep. |
| Ano: 2015 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982015001100405 |
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| Registros recuperados: 26 | |
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