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| Registros recuperados: 27 | |
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| Bresolin, Tiago; Everling, Dionéia Magda; Rorato, Paulo Roberto Nogara; Braz, Camila Urbano; Breda, Fernanda Cristina. |
| The aim of this study was to assess the occurrence of genotype-environment interaction, as well as its effects on the magnitude of genetic parameters and the classification of Nellore breeding bulls for the trait adjusted weight at 205 days (W205) on Southern Brazil. The components of (co)variance were estimated by Bayesian inference, using a linear-linear animal model in a bi-trait analysis. The proposed model for the analyses considers as random the direct additive genetic and maternal effects and residual effects, and as fixed effects the contemporary groups, sex, season of birth and weighing, and calving age as covariable (linear and quadratic effects). The a posteriori mean estimates of the direct heritabilities for W205 in the three States varied... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Beef cattle; Variance components; Genetic correlation; Bayesian inference; Genetic parameters.. |
| Ano: 2015 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAnimSci/article/view/23602 |
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| Santos, Alexandre Leseur; UEM; Scapinello, Cláudio; UEM; Martins, Elias Nunes; UEM; Granzotto, Fernanda; UEM; Paula, Meybi Carneiro; UEM; Hidalgo, André Marubayashi; UEM. |
| O objetivo do presente trabalho foi avaliar se a seleção para conversão alimentar (CA) e ganho de peso (GP), com base no desempenho individual e ou coletivo dos láparos, pode produzir ganhos genéticos em progênies criadas coletivamente, e animais submetidos à avaliação no período de 50 a 70 dias de idade, utilizando inferência Bayesiana. Realizaram-se seis análises bicaráter. No teste de desempenho foi observado que as características ganho de peso e conversão alimentar em ambos os ambientes tiveram valores para herdabilidade que variam de 0,42 a 0,60. Tanto a correlação genética 0,44 a 0,68 (GP) e 0,23 a 0,56 (CA) como a fenotípica 0,30 (GP) e 0,17 (CA) foram positivas para a mesma característica quando avaliada nos dois ambientes, coletivo ou individual,... |
| Tipo: Pesquisa de Campo; Metodologia |
Palavras-chave: 5.04.02.00-5; Herdabilidade; Ganho de peso; Conversão alimentar; Correlação genética; Inferência bayesiana GENÉTICA E MELHORAMENTO DOS ANIMAIS DOMÉSTICOS Heritability; Weight gain; Feed conversion; Genetic correlation; Bayesian inference. |
| Ano: 2009 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAnimSci/article/view/6262 |
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| Wei Wang,Mi Sun. |
| Neigh-borjoining, maximum-parsimony, minimum-evolution, maximum-likelihood and Bayesian trees constructed based on 16S rDNA sequences of 181 type strains of Bacillus species and related taxa manifested nine phylogenetic groups. The phylogenetic analysis showed that Bacillus was not a monophyletic group. B. subtilis was in Group 1. Group 4, 6 and 8 respectively consisted of thermophiles, halophilic or halotolerant bacilli and alkaliphilic bacilli. Group 2, 4 and 8 consisting of Bacillus species and related genera demonstrated that the current taxonomic system did not agree well with the 16S rDNA evolutionary trees. The position of Caryophanaceae and Planococcaceae in Group 2 suggested that they might be transferred into Bacillaceae, and the heterogeneity of... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Bacillus phylogeny; Bayesian inference; Evolutionary trees; 16S rDNA. |
| Ano: 2009 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822009000300013 |
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| Castro Montoya, René. |
| Debido a factores externos a las variables de inter´es, una serie de tiempo puede presentar cambios en la estructura del modelo o en algunos par´ametros, y debido a l´ımitaciones en los instrumentos de medici´on puede presentar tambi´en censura en las observaciones. Por ejem- plo, cuando se monitorean contaminantes del aire, como pueden ser hidrocarburos arom´aticos (PAHs), mon´oxido de carbono (CO), di´oxido de sulfuro (S O2 ), etc., las series de tiempo ob- servadas pueden tener mediciones censuradas y cambios en la estructura del modelo. En esta tesis se propone un modelo bayesiano para series de tiempo con un n´ umero desconocido de puntos de cambio y con algunas observaciones censuradas, donde cada segmento es un proceso autoregresivo de... |
| Tipo: Tesis |
Palavras-chave: Imputación múltiple; Inferencia bayesiana; Algoritmo de Metrópolis; Algoritmo de cadenas de Markov Monte Carlo con saltos reversibles Multiple imputation; Bayesian inference; Metropolis algorithm; Reversible jump Markov chain Monte Carlo algorithm. |
| Ano: 2012 |
URL: http://hdl.handle.net/10521/1067 |
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| Castro Montoya, René. |
| Debido a factores externos a las variables de inter´es, una serie de tiempo puede presentar cambios en la estructura del modelo o en algunos par´ametros, y debido a l´ımitaciones en los instrumentos de medici´on puede presentar tambi´en censura en las observaciones. Por ejem- plo, cuando se monitorean contaminantes del aire, como pueden ser hidrocarburos arom´aticos (PAHs), mon´oxido de carbono (CO), di´oxido de sulfuro (S O2 ), etc., las series de tiempo ob- servadas pueden tener mediciones censuradas y cambios en la estructura del modelo. En esta tesis se propone un modelo bayesiano para series de tiempo con un n´ umero desconocido de puntos de cambio y con algunas observaciones censuradas, donde cada segmento es un proceso autoregresivo de... |
| Tipo: Tesis |
Palavras-chave: Imputación múltiple; Inferencia bayesiana; Algoritmo de Metrópolis; Algoritmo de cadenas de Markov Monte Carlo con saltos reversibles; Doctorado; Estadística; Multiple imputation; Bayesian inference; Metropolis algorithm; Reversible jump Markov chain Monte Carlo algorithm. |
| Ano: 2009 |
URL: http://hdl.handle.net/10521/1396 |
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| Faria,Carina Ubirajara de; Magnabosco,Cláudio de Ulhôa; Reyes,Arcadio de los; Lôbo,Raysildo Barbosa; Bezerra,Luiz Antônio Framartino; Sainz,Roberto Daniel. |
| The objective of this study was to estimate (co)variance components and genetic parameters for weights (W) and scrotal circumferences (SC) at 365 and 450 days of age, of Nelore (Bos indicus) cattle, using Bayesian inference in single and multiple-trait animal models. The fitted linear models included, besides the animal and residual random effects, the contemporary group (herd-year-season-sex-management group) and age-of-dam as "fixed effects". The analyses were carried out using a Gibbs sampler implemented through the MTGSAM program. The heritabilities (in parentheses) obtained fitting single-trait models were W365 (0.49), W450 (0.52), SC365 (0.68) and SC450 (0.66). Estimates of means, modes and medians for genetic parameters obtained from marginal... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Bayesian inference; Growth traits; Genetic parameters. |
| Ano: 2007 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572007000400007 |
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| Diaz,Iara Del Pilar Solar; Oliveira,Henrique Nunes de; Bezerra,Luis Antônio Framartino; Lôbo,Raysildo Barbosa. |
| Records from 75,941 Nelore cattle were used to determine the importance of genotype by environment interaction (GEI) in five Brazilian states. (Co)variance components were estimated by single-trait analysis (with yearling weight, W450, considered to be the same trait in all states) and multiple-trait analysis (with the record from each state considered to be a different trait). The direct heritability estimates for yearling weight were 0.51, 0.39, 0.44, 0.37 and 0.41 in the states of Goiás, Mato Grosso, São Paulo, Mato Grosso do Sul and Minas Gerais, respectively. The across-state genetic correlation estimates between Goiás and Mato Grosso, Goiás and Minas Gerais, São Paulo and Minas Gerais, and Mato Grosso do Sul and Minas Gerais ranged from 0.67 to 0.75.... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Bayesian inference; Beef cattle; Genetic correlation. |
| Ano: 2011 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572011000300012 |
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| Ortí,Guillermo; Sivasundar,Arjun; Dietz,Kelly; Jégu,Michel. |
| Previous studies based on DNA sequences of mitochondrial (mt) rRNA genes showed three main groups within the subfamily Serrasalminae: (1) a "pacu" clade of herbivores (Colossoma, Mylossoma, Piaractus); (2) the "Myleus" clade (Myleus, Mylesinus, Tometes, Ossubtus); and (3) the "piranha" clade (Serrasalmus, Pygocentrus, Pygopristis, Pristobrycon, Catoprion, Metynnis). The genus Acnodon was placed as the sister taxon of clade (2+3). However, poor resolution within each clade was obtained due to low levels of variation among rRNA gene sequences. Complete sequences of the hypervariable mtDNA control region for a total of 45 taxa, and additional sequences of 12S and 16S rRNA from a total of 74 taxa representing all genera in the family are now presented to... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Piranhas; Pacus; D-loop; Phylogeny; Bayesian inference. |
| Ano: 2008 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572008000200030 |
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| Faria,Carina Ubirajara de; Magnabosco,Cláudio de Ulhôa; Reyes,Arcadio de los; Lôbo,Raysildo Barbosa; Bezerra,Luiz Antônio Framartino; Sainz,Roberto Daniel. |
| We used Gibbs sampling in single and two-trait animal models to estimate genetic parameters for some reproductive and related traits of Nellore cattle (Bos indicus). Female traits were age at first calving (AFC), cumulative productivity (CP) and adult weight (AW). For males, scrotal circumferences at 365 and 450 days of age were analyzed. Gibbs sampling using the Multiple Trait using Gibbs Sampling under Animal Model (MTGSAM) program of Van Tassel and Van Vleck was used to estimate the (co)variance components of the traits and conduct genetic analyses. Heritabilities were AFC = 0.26, AW = 0.36 and CP = 0.25 under the single-trait animal model. The mean, mode and median estimates for genetic parameters obtained from the marginal posterior distributions... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Bayesian inference; Genetic parameters; Heritabilities; Nellore cattle; Reproductive traits. |
| Ano: 2007 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572007000300008 |
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| Hanna,Lauren L. Hulsman; Garrick,Dorian J.; Gill,Clare A.; Herring,Andy D.; Sanders,James O.; Riley,David G.. |
| The objectives of this study were to 1) compare four models for breeding value prediction using genomic or pedigree information and 2) evaluate the impact of fixed effects that account for family structure. Comparisons were made in a Nellore-Angus population comprising F2, F3 and half-siblings to embryo transfer F2 calves with records for overall temperament at weaning (TEMP; n = 769) and Warner-Bratzler shear force (WBSF; n = 387). After quality control, there were 34,913 whole genome SNP markers remaining. Bayesian methods employed were BayesB ( π = 0.995 or 0.997 for WBSF or TEMP, respectively) and BayesC (π = 0 and π), where π is the ideal proportion of markers not included. Direct genomic values (DGV) from single trait Bayesian analyses were compared... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Bayesian inference; Crossbred cattle; Genomic prediction; Model comparison. |
| Ano: 2014 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572014000500005 |
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| Thebault, Anne; Arnich, Nathalie; Belin, Catherine; Neaud-masson, Nadine. |
| In France, the sampling strategy for the official monitoring of lipophilic phycotoxins in bivalve shellfish relies on the definition of risk areas and high risk periods, during which a systematic weekly analysis of toxins in shellfish is performed. Since 2010, high risk periods are defined as follows: the occurrence of one result above the European regulatory limit (160 μg equivalent okadaic acid/kg shellfish) over the last 3 years leads to that month being considered a high risk period. This definition was established according to a statistical analysis of the official monitoring results for the period 2003-2008, based on the mouse bioassay (MBA) as the official analytical method. As of the 1st January 2010, the MBA has been replaced by LC-MS/MS. In 2014,... |
| Tipo: Text |
Palavras-chave: Monitoring; Shellfish; Lipophilic phycotoxins; Bayesian inference. |
| Ano: 2014 |
URL: http://archimer.ifremer.fr/doc/00393/50470/51205.pdf |
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| Schoch, C.L.; Wang, Z.; Townsend, J.P.; Spatafora, J.W.. |
| Featuring a high level of taxon sampling across Ascomycota, we evaluate a multi-gene phylogeny and propose a novel order and class in Ascomycota. We describe two new taxa, Geoglossomycetes and Geoglossales, to host three earth tongue genera: Geoglossum, Trichoglossum and Sarcoleotia as a lineage of ‘Leotiomyceta’. Correspondingly, we confirm that these genera are not closely related to the genera Neolecta, Mitrula, Cudonia, Microglossum, Thuemenidum, Spathularia and Bryoglossum, all of which have been previously placed within the Geoglossaceae. We also propose a non-hierarchical system for naming well-resolved nodes, such as ‘Saccharomyceta’, ‘Dothideomyceta’, and ‘Sordariomyceta’ for supraordinal nodes, within the current phylogeny, acting as rankless... |
| Tipo: Article / Letter to the editor |
Palavras-chave: Bayesian inference; Hybrid classification; Maximum likelihood. |
| Ano: 2009 |
URL: http://www.repository.naturalis.nl/record/532418 |
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| Resende,RO; Martins,EN; Georg,PC; Paiva,E; Conti,ACM; Santos,AI; Sakaguti,ES; Murakami,AE. |
| The objective of this study was to estimate the variance components for body weight in Japanese quails by Bayesian procedures. The body weight at hatch (BWH) and at 7 (BW07), 14 (BW14), 21 (BW21) and 28 days of age (BW28) of 3,520 quails was recorded from August 2001 to June 2002. A multiple-trait animal model with additive genetic, maternal environment and residual effects was implemented by Gibbs sampling methodology. A single Gibbs sampling with 80,000 rounds was generated by the program MTGSAM (Multiple Trait Gibbs Sampling in Animal Model). Normal and inverted Wishart distributions were used as prior distributions for the random effects and the variance components, respectively. Variance components were estimated based on the 500 samples that were... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Bayesian inference; Heritability; Maternal environment. |
| Ano: 2005 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2005000100004 |
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| Sousa Júnior,Severino Cavalcante de; Diaz,Iara Del Pilar Solar; Santos,Karina Rodrigues dos; Sousa,José Ernandes Rufino de; Sarmento,José Lindenberg Rocha; Martins Filho,Raimundo. |
| The objective of this study was to evaluate the effect of genotype by environment interaction (GEI) on the weight of Tabapuã cattle at 240 (W240), 365 (W365) and 450 (W450) days of age. In total, 35,732 records of 8,458 Tabapuã animals which were born in the state of Bahia, Brazil, from 1975 to 2001, from 167 sires and 3,707 dams, were used. Two birth seasons were tested as for the environment effect: the dry (D) and rainy (R) ones. The covariance components were obtained by a multiple-trait analysis using Bayesian inference, in which each trait was considered as being different in each season. Covariance components were estimated by software gibbs2f90. As for W240, the model was comprised of contemporary groups and cow age (in classes) as fixed effects;... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Bayesian inference; Beef cattle; Genetic correlation; Multiple-trait analysis. |
| Ano: 2012 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982012001000005 |
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| Costa-Maia,Fabiana Martins; Toledo,Vagner de Alencar Arnaut de; Martins,Elias Nunes; Lino-Lourenço,Daniela Andressa; Sereia,Maria Josiane; Oliveira,Carlos Antonio Lopes de; Faquinello,Patrícia; Halak,André Luiz. |
| Genetic and phenotypic parameters considering the genetic effect on hygienic behavior of queen and workers from 40 Africanized honeybees colonies were estimated separately. Maternal origin of queens was controlled whereas the paternal was unknown, and different groups of workers were considered in three seasons, October 2006, April 2007 and August 2007, but with the same queen. Colonies were 21 honey producers and 19 royal jelly producers. After the method of freezing capped brood, hygienic behavior was determined by the ratio between the number of dead capped brood removed at 24, 48 and 72 hours and the total number of capped brood at zero hour. Data was submitted to single and three traits analyses using Bayesian inference. Estimates of direct... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Africanized honeybee queens; Bayesian inference; Genetic correlation; Heritability; Maternal effect; Removal of dead capped brood. |
| Ano: 2011 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982011000900010 |
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| Rossi,Robson Marcelo; Martins,Elias Nunes; Guedes,Terezinha Aparecida; Jobim,Clóves Cabreira. |
| This paper shows the Bayesian approach as an alternative to the classical analysis of nonlinear models for ruminal degradation data. The data set was obtained from a Latin square experimental design, established for testing the ruminal degradation of dry matter, crude protein and fiber in neutral detergent of three silages: elephant grass (Pennisetum purpureum Schum) with bacterial inoculant or enzyme-bacterial inoculant and corn silage (Zea mays L.). The incubation times were 0, 2, 6, 12, 24, 48, 72 and 96 hours. The parameter estimates of the equations fitted by both methods showed small differences, but by the Bayesian approach it was possible to compare the estimates correctly, that does not happen with the frequentist methodology because it is much... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Bayesian inference; Degradability; Nonlinear models. |
| Ano: 2010 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982010000200027 |
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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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| Registros recuperados: 27 | |
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