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Search Results: 1 - 10 of 342521 matches for " Martinho de Almeida e;Pereira "
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Desempenho e Predi o de Híbridos e Análise de Agrupamento de Características de Matrizes de Frangos de Corte
Abreu Valéria Maria Nascimento,Silva Martinho de Almeida e,Cruz Cosme Dami?o,Figueiredo élsio Ant?nio Pereira de
Revista Brasileira de Zootecnia , 2002,
Abstract: Este trabalho foi conduzido com cruzamentos (dialelo parcial) entre as linhas do grupo I (LL, TL, ZL, TT, LT, ZT, ZZ, LZ e TZ) e as linhas do grupo II (PP, KP, VP, KK, PK, VK, VV, PV e KV), além de duas linhas (LLc e PPc) controle. O delineamento experimental foi em blocos casualizados consistindo de três blocos, 82 cruzamentos e nove fêmeas por cruzamento. As características de produ o, no total de onze, foram: fertilidade na 32a, 38a, 42a e 49a semanas, eclodibilidade na 32a semana, peso inicial dos pintinhos, peso no 42o dia, convers o no 42o dia, rendimento de carca a, peito e gordura abdominal no 42o dia de idade dos frangos. As médias e predi o dos híbridos mostraram ser fonte importante de informa es para o melhorista. Existe similaridade entre os cruzamentos oriundos da utiliza o da linha 1, como progenitor.
Efeito da ractopamina e de métodos de formula??o de dietas sobre o desempenho e as características de carca?a de suínos machos castrados em termina??o
Marinho, Paula Cambraia;Fontes, Dalton de Oliveira;Silva, Francisco Carlos de Oliveira;Silva, Martinho de Almeida e;Pereira, Francisco Alves;Arouca, Cláudio Luiz Corrêa;
Revista Brasileira de Zootecnia , 2007, DOI: 10.1590/S1516-35982007000500011
Abstract: an experiment was conduced with the objective of evaluating the effects of diet formulation methods and supplementation of ractopamine (rac) on the performance and carcass characteristics of finishing barrows. sixty commercial hybrid swines were used, distributed in a randomized experimental block design, in a 2 x 3 factorial arrangment, with two levels of rac and three methods of diet formulation. supplementation with rac improved the final weight, daily weight gain (dwg) and feed conversion (fc) of the finishing barrows. addition of rac improved also the carcass characteristics by reducing the backfat thickness in point p1 and increase daily lean meat deposition rate. diets formulated based in the concept of ideal protein or by the increase of soybean meal provided better results on fc, but did not influence significantly daily feed intake, dwg and carcass characteristics. finishing barrows supplemented with rac during 21 or 28 days showed better performance and carcass quality. diets formulated to attend the levels of digestible lysine by the inclusion of l-lysine hcl with the adjustment of other amino acids for ideal protein relation (ideal protein) or by the greater inclusion of soybean meal (increase of cp) provided better results of feed conversion in finishing borrows supplemented with rac during 28 days.
Efeito dos níveis de lisina digestível e da ractopamina sobre o desempenho e as características de carca?a de suínos machos castrados em termina??o
Marinho, Paula Cambraia;Fontes, Dalton de Oliveira;Silva, Francisco Carlos de Oliveira;Silva, Martinho de Almeida e;Pereira, Francisco Alves;Arouca, Cláudio Luiz Corrêa;
Revista Brasileira de Zootecnia , 2007, DOI: 10.1590/S1516-35982007000800012
Abstract: an experiment was carried out with the objective of evaluating the effect of different lysine levels in diets supplemented or not with ractopamine (rac) on the performance and carcass characteristics of finishing barrows. forty commercial hybrid swines were distributed to a randomized experimental block design, in a 2 x 2 factorial arrangement, with two digestible lysine levels (0.67 and 0.87%), with adjustment for the others amino acids to achieve an ideal protein relationship, and two levels of rac (0 and 5.0 ppm) in a period of 28 days. supplementation with rac resulted in a higher daily weight gain and of daily lean meat deposition rate, and better feed conversion. the lysine levels did not affect the performance of the animals, however there was a reduction of backfat thickness on p1 and p2 points and increased the daily lean meat deposition rate on the carcass of swine fed with diets containing 0.87% of digestible lysine when in vivo evaluated. in conclusion, performance and carcass characteristics of swine fed with diets supplemented with rac in the finishing phase improved; however the effect of rac on the loin depth was higher for the higher level of 0.87% of digestible lysine.
Estudo da capacidade de combina??o de linhagens de matrizes de frango de corte, por meio da análise de fatores de características produtivas
Abreu, Valéria Maria Nascimento;Cruz, Cosme Dami?o;Silva, Martinho de Almeida e;Figueiredo, élsio Ant?nio Pereira de;Abreu, Paulo Giovanni de;
Revista Brasileira de Zootecnia , 1999, DOI: 10.1590/S1516-35981999000600006
Abstract: this study was carried out to study the combining ability of parental broiler lines using factor analysis of production traits. the single crosses (partial diallel) among the male lines of group 1 (ll, tl, zl, tt, lt, zt, zz, lz, and tl) and female lines of group 2 (pp, kp, vp, kk, pk, vk, vv, pv, and kv). a completely randomized blocks design, with three blocks, 81 single crosses and nine females per cross was used. the production traits, were fertility at 32nd, 38th , 42nd and 49th weeks of age, hatchability at 32nd, the initial body weights of the chicks, body weight and feed:gain ratio at 42nd days of age, and carcass yield, breast yield and fat pad yield at 42nd day of age of the broiler. four factors, whose biological meanings were defined after rotation of the factor, were used. the lines that stood out in the factor analysis, for factor 2 (body weight factor at 42nd day) were lt and lz, in group 1, and vp, kp, kk, kv, pk and vv, in group 2.
Desempenho e Predi??o de Híbridos e Análise de Agrupamento de Características de Matrizes de Frangos de Corte
Abreu, Valéria Maria Nascimento;Silva, Martinho de Almeida e;Cruz, Cosme Dami?o;Figueiredo, élsio Ant?nio Pereira de;Abreu, Paulo Giovanni de;
Revista Brasileira de Zootecnia , 2002, DOI: 10.1590/S1516-35982002000300011
Abstract: this study was conducted using data from single crosses (partial diallel) of male lines, group i (ll, tl, zl, tt, lt, zt, zz, lz, tl), female lines, group ii (pp, kp, vp, kk, pk, vk, vv, pv, kv), besides two control lines (llc and ppc). a completely randomized block design, with three replicales, 82 single crosses treatments with nine females for experimental unit was used in the analyses. the production traits analyzed, eleven total, were: fertility at 32nd, 38th, 42nd and 49th weeks of age, hatchability at 32nd, body weight at day of age, body weight and feed:gain ratio at 42nd days of age, and carcass yield, breast yield and fast pad yield at 42nd day of age. the averages and prediction of the hybrid ones showed to be important source of information. similarity exists among the crossings originating from of the use of the line 1, as progenitor.
Genetic trends in the performance and reproductive traits of pigs
Torres Filho, Rodolpho de Almeida;Torres, Robledo de Almeida;Lopes, Paulo Sávio;Pereira, Carmen Silva;Euclydes, Ricardo Frederico;Araújo, Cláudio Vieira de;Silva, Martinho de Almeida e;
Genetics and Molecular Biology , 2005, DOI: 10.1590/S1415-47572005000100017
Abstract: the selection and evaluation of breeds and purebred lines to be used as the parental stock is an important step for the success of any animal breeding program. in this study, the feed:gain ratio, backfat thickness corrected for 100 kg, age to 100 kg, average daily gain, and age of sow at first farrowing were used to evaluate the genetic trends for direct and maternal additive genetic values in large white pigs. the total number of piglets born or born alive and the litter weight at birth were used as indicators of the genetic trends for the direct additive values. the genetic trends were calculated by regression of the average predicted genetic values per year for each trait versus the offspring's year of birth (for performance traits) or versus the dam year of birth (for reproduction traits). the genetic trend estimates for direct effects showed that selection decisions made during the breeding program effectively improved the performance traits. however, for reproductive traits, the regression estimates showed no definite trend. the genetic trends for the maternal effects were generally positive but of low magnitude.
Avalia??o de modelos para estima??o de componentes de (co)variancia em características de desempenho e reprodutivas em suínos
Torres Filho, Rodolpho de Almeida;Torres, Robledo de Almeida;Lopes, Paulo Sávio;Euclydes, Ricardo Frederico;Araújo, Cláudio Vieira de;Pereira, Carmen Silva;Silva, Martinho de Almeida e;
Revista Brasileira de Zootecnia , 2004, DOI: 10.1590/S1516-35982004000200011
Abstract: large white data set with performance and reproductive traits for a development line were analyzed in order to verify the importance of including maternal and common litter effects in genetic evaluation models, using four different models: model 1 - direct genetic effect; model 2 - the direct and maternal genetic effects; model 3 - the direct and common litter effects; and the model 4 - the direct, maternal and common litter effects. the traits were analyzed by restricted maximum likelihood method (reml). the likelihood ratio test was applied in order to verify which model was more adapted to the genetic evaluation. pearson and spearman correlation among predicted values for each trait in different models were obtained, in order to verify ranking alterations when the most adapted model was not used. the model 4 was the most adapted to performance traits and age at first farrowing and, for the litter traits, the model 1. for some traits, in which the model 4 was the most adapted, the correlations between predicted values, by the model 4 and the remaining, were close to unit, indicating that with limited computational conditions, models less parameterized could be used without prejudice to the real genetic gain.
Exigência de metionina mais cistina para codornas japonesas em crescimento
Pinto, Rogério;Ferreira, Aloízio Soares;Donzele, Juarez Lopes;Albino, Luiz Fernando Teixeira;Silva, Martinho de Almeida e;Soares, Rita da Trindade Ribeiro Nobre;Pereira, Ciane Aparecida;
Revista Brasileira de Zootecnia , 2003, DOI: 10.1590/S1516-35982003000500018
Abstract: five hundred and forty 7-days old female quails, averaging 21.50 g, were used during 35 days. a completely randomized blocks design with five replicates and 18 females per experimental unity was used to study the effect of six digestible methionine plus cystine: digestible lysine ratios (0.48, 0.53, 0.58, 0.63, 0.68 and 0.75) on the traits evaluated during the growing period. final weight (g), weight gain (g), feed intake (g), feed conversion (g/g), feather rate (%), chemical composition (%) (dry matter, water, crude protein and ether extract) and body protein and fat deposition (g). the effect of the amino acids on feed intake (g), feed conversion (g/g), feather rate (%), chemical composition (%) (dry matter, water, crud protein and ether extract) and protein deposition was quadratic and the effect on final body weight (g) and weight gain (g) was linear. the best estimated digestible methionine plus cystine: digestible lysine ratio was .66 and the estimated digestible methionine plus cystine requirement for growing japanese quail was .758%, for a intake of 91.43 mg of digestible methionine plus cystine intake.
Exigência de metionina mais cistina para codornas japonesas em postura
Pinto, Rogério;Donzele, Juarez Lopes;Ferreira, Aloízio Soares;Albino, Luiz Fernando Teixeira;Soares, Rita da Trindade Ribeiro Nobre;Silva, Martinho de Almeida e;Pereira, Thais Alves;
Revista Brasileira de Zootecnia , 2003, DOI: 10.1590/S1516-35982003000500017
Abstract: three hundred and sixty 45-days old female quails, averaging 137.0 g, were used during four experimental periods of 28 days each. a completely randomized block design, with six replicates and ten females per experimental unit, was used to study the digestible methionine plus cystine requirement and the best digestible methionine plus cystine: digestible lysine ratio (0.60, 0.65, 0.70, 0.75, 0.80 and 0.85), on the rate of eggs production (%), egg weight (g), eggs mass (g of eggs/quail/day), feed intake (g), feed consumption: weight gain ratio (g of diet/g of eggs), body weight (g) and shell percentage (%). no significant effect of treatments on feed consumption: gain diet (g of diet/g of eggs). quadratic effects were observed for final body weight (g), egg production (%), egg weight (g), egg mass (g of eggs/quail/day) and shell egg (%), and for feed intake (g) the effect was linear. the estimated digestible methionine plus cystine requirement was .727%, for a daily intake of 164 mg of digestible methionine plus cystine, and the best estimated digestible methionine plus cystine: digestible lysine ratio for laying japanese quails was .80.
Métodos de estima??o de efeitos genéticos n?o-aditivos para características de peso e perímetro escrotal em bovinos de corte mesti?os
Bueno, Rachel Santos;Torres, Robledo de Almeida;Ferraz, José Bento Sterman;Lopes, Paulo Sávio;Eler, Joanir Pereira;Mour?o, Gerson Barreto;Silva, Martinho de Almeida e;Mattos, Elisangela Chicaroni de;
Revista Brasileira de Zootecnia , 2012, DOI: 10.1590/S1516-35982012000500009
Abstract: the objective of this study was to investigate, in a population of crossbred cattle, the obtainment of the non-additive genetic effects for the characteristics weight at 205 and 390 days and scrotal circumference, and to evaluate the consideration of these effects in the prediction of breeding values of sires using different estimation methodologies. in method 1, the data were pre-adjusted for the non-additive effects obtained by least squares means method in a model that considered the direct additive, maternal and non-additive fixed genetic effects, the direct and total maternal heterozygosities, and epistasis. in method 2, the non-additive effects were considered covariates in genetic model. genetic values for adjusted and non-adjusted data were predicted considering additive direct and maternal effects, and for weight at 205 days, also the permanent environmental effect, as random effects in the model. the breeding values of the categories of sires considered for the weight characteristic at 205 days were organized in files, in order to verify alterations in the magnitude of the predictions and ranking of animals in the two methods of correction data for the non-additives effects. the non-additive effects were not similar in magnitude and direction in the two estimation methods used, nor for the characteristics evaluated. pearson and spearman correlations between breeding values were higher than 0.94, and the use of different methods does not imply changes in the selection of animals.
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