Consulta: subjectFacets:"Bayesian inference"
Registros recuperados: 27
Data/hora: 03/06/2024 01:34:13

Análisis bayesiano de modelos lineales - bilineales.
Provedor de dados: 32
Autores: Hernández Jarquín, Juan Diego.
El análisis de tablas de doble entrada es una herramienta estadística que se presenta en diversos campos de investigación; por ejemplo, en fitomejoramiento uno de los principales objetivos es evaluar la adaptabilidad y estabilidad genotípica en la selección de los padres para el siguiente ciclo de mejoramiento.  Generalmente, este proceso se ve afectado por la presencia de la interacción Genotipo x Ambiente (GE). Bajo el enfoque clásico, para el estudio de la interacción se consideran modelos parsimoniosos como el AMMI ó el SREG y se obtienen estimaciones puntuales mediante Mínimos  Cuadrados Ordinarios (MCO) por lo que no es trivial la construcción de intervalos de confianza y el diseño de pruebas de hipótesis. En este trabajo se propone una modelación...
Palavras-chave: Distribución von Mises-Fisher; Inferencia bayesiana; Fitomejoramiento; Tablas de doble entrada con interacción; Términos bilineales de interacción; Bayesian inference; Bilinear interaction terms; Plant breeding; Two-way tables with interaction; Von mises fisher distribution; Estadística; Doctorado.
Ano: 2012
URL: http://hdl.handle.net/10521/676

Series de tiempo con múltiples puntos de cambio y observaciones censuradas
Provedor de dados: 32
Autores: 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

Series de tiempo con múltiples puntos de cambio y  observaciones censuradas
Provedor de dados: 32
Autores: 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

Comparison of breeding value prediction for two traits in a Nellore-Angus crossbred population using different Bayesian modeling methodologies
Provedor de dados: 74
Autores: 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

Phylogeny of the Serrasalmidae (Characiformes) based on mitochondrial DNA sequences
Provedor de dados: 74
Autores: 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

Bayesian inference on field data for genetic parameters for some reproductive and related traits of Nellore cattle (Bos indicus)
Provedor de dados: 74
Autores: 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

ITS2 variability of Biomphalaria (Mollusca, Planorbidae) species from the Paranapanema Valley (São Paulo State, Brazil): diversity patterns, population structure, and phylogenetic relationships
Provedor de dados: 74
Autores: Tuan,Roseli; Santos,Priscila dos.
The ribosomal DNA internal transcribed spacer 2 (ITS2) has been shown to be a useful genetic marker for species identification and phylogenetic reconstruction in the genus of freshwater snails Biomphalaria (Preston 1910). Additionally, ITS2 studies in Biomphalaria have uncovered significant intra-specific genetic variability suggesting the presence of cryptic species complexes. We obtained ITS2 sequences for the Biomphalaria species B. glabrata, B. tenagophila, B. occidentalis and B. peregrina from the Paranapanema Valley (São Paulo State, Brazil) and compared them with a comprehensive set of published Biomphalaria ITS2 sequences using Bayesian inference of phylogeny. Analysis of the resulting trees showed that the newly obtained B. glabrata sequences did...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Bayesian inference; Biomphalaria; DNA sequences; Internal transcribed spacer 2 (ITS2); Ribosomal DNA.
Ano: 2007
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572007000100024

Bayesian inference in a quantitative genetic study of growth traits in Nelore cattle (Bos indicus)
Provedor de dados: 74
Autores: 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

Genotype by environment interaction in Nelore cattle from five Brazilian states
Provedor de dados: 74
Autores: 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

Shellfish monitoring for lipophilic phycotoxins in France, recommendation for an updated sampling strategy
Provedor de dados: 5
Autores: 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

Relationships of the haematophagous marine snail Colubraria (Rachiglossa: Colubrariidae), within the neogastropod phylogenetic framework
Provedor de dados: 5
Autores: Oliverio, Marco; Modica, Maria Vittoria.
The gastropod genus Colubraria includes marine shallow-water species from tropical, subtropical, and temperate rocky coral environments. At least six species are known to feed on fish blood. Although there is general consensus in placing Colubraria in the Neogastropoda, the actual relationships and the systematic position of Colubraria and related genera are unknown. This is partly the consequence of the lack of a clear phylogenetic framework for the Neogastropoda. This study attempts to propose a phylogenetic framework for the Neogastropoda, by testing: (1) a preliminary phylogenetic arrangement for a large number of recognized neogastropod families; (2) the position of Colubraria within the neogastropods; and (3) the relationships of Colubraria within...
Tipo: Text
Palavras-chave: Bayesian inference; Buccinoidea; Cancellarioidea; Conoidea; Maximum Likelihood; Muricoidea; Neogastropoda; Phylogeny; Radula; Systematics.
Ano: 2010
URL: https://archimer.ifremer.fr/doc/00207/31804/30216.pdf

Geoglossomycetes cl. nov., Geoglossales ord. nov. and taxa above class rank in the Ascomycota Tree of Life
Provedor de dados: 16
Autores: 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

Variance components for body weight in Japanese quails (Coturnix japonica)
Provedor de dados: 89
Autores: 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

Bayesian analysis for comparison of nonlinear regression model parameters: an application to ruminal degradability data
Provedor de dados: 96
Autores: 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

Addressing scope of inference for global genetic evaluation of livestock
Provedor de dados: 96
Autores: Tempelman,Robert John.
Genetic evaluations should become more accurate with the advent of whole genome selection (WGS) based on high density SNP panels. The use of WGS should then accelerate genetic gains for production traits given likely decreases in generation interval due to the greater intent to select more animals based just on their genotypes rather than phenotypes. However, past and current genetic evaluations may not generally connect well to the intended scope of inference. For example, estimating haplotype effects from the data of a single reference population does not bode well for the use of WGS in other diverse environments since the scope of inference is too narrow; conversely, WGS based on estimates, for example, derived from daughter yield deviations of dairy...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Bayesian inference; Genotype by environment interaction; Heterogeneous variances; Mixed effects models; Multiple traits; Random effects.
Ano: 2010
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982010001300029

Hierarchical Bayesian models for genotype × environment estimates in post-weaning gain of Hereford bovine via reaction norms
Provedor de dados: 96
Autores: 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

Estimates of covariance components for hygienic behavior in Africanized honeybees (Apis mellifera)
Provedor de dados: 96
Autores: 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

Genetic parameters and relationships between heifers rebreeding and hip height in Nellore cattle
Provedor de dados: 96
Autores: Boligon,Arione Augusti; Albuquerque,Lucia Galvão de.
The objective of this study was to estimate heritability and verify the genetic correlations between heifers subsequent rebreeding with weaning hip height (WHH) and yearling hip height (YHH), using Bayesian inference. The (co)variance components and genetic parameters were estimated using an animal nonlinear (threshold) model for subsequent rebreeding and an animal linear model for WHH and YHH. The animal model included the contemporary group as the systematic effect and direct additive genetic and residual effects as random effects. Genetic maternal and maternal permanent environment effects were also considered in the model for WHH. Covariables considered were: rest period (linear effect), for subsequent rebreeding; animal age at measurement and age of...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Bayesian inference; Beef cattle; Heritability; Reproductive trait.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982012000300017

Heteroskedasticity for weaning weight of Charolais-Zebu crossbred calves
Provedor de dados: 96
Autores: Toral,Fábio Luiz Buranelo; Torres Júnior,Roberto Augusto de Almeida; Lopes,Paulo Sávio; Cardoso,Fernando Flores; Silva,Luiz Otávio Campos da.
The objective of the present study was to analyze models with genetic and/or residual heteroskedasticity for genetic evaluation of the weaning weight of Charolais-Zebu crossbred calves. Weaning weight data from 56,965 crossbred calves were analyzed using animal models with different combinations of genetic and residual heteroskedasticity and/or homoskedasticity. The inference on a posteriori distributions of genetic parameters were by the Monte Carlo method via Markov chains. The model with genetic and residual heteroskedasticity was the best fit on the data. Groups of animals with different genetic compositions, expressed as percentages of Charolais-Zebu breed alleles and individual and maternal heterozygosis, had different genetic variances. These...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Animal breeding; Bayesian inference; Canchim; Crossbreeding; Selection.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982012000500013

Reaction norms models in the adjusted weight at 550 days of age for Polled Nellore cattle in Northeast Brazil
Provedor de dados: 96
Autores: 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

Genotype by environment interaction in different birth seasons for weight at 240, 365 and 450 days of age in Tabapuã cattle
Provedor de dados: 96
Autores: 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

Bayesian AMMI applied to food-type soybean multi-environment trials
Provedor de dados: 124
Autores: Freiria,Gustavo Henrique; Gonçalves,Leandro Simões Azeredo; Zeffa,Douglas Mariani; Lima,Wilmar Ferreira; Fonseca Júnior,Nelson da Silva; Prete,Cássio Egídio Cavenaghi; Fonseca,Inês Cristina de Batista.
ABSTRACT A complicating factor for the selection of plant strains is the influence of a genotype-environment (GE) interaction. The Bayesian approach is a tool to increase the efficiency of adaptability and stability methodologies. In this context, the objective of this study was to evaluate the linear and bi-linear parameters of the additive main effects and multiplicative interaction (AMMI) analysis using the Bayesian approach for selection of food-type soybean genotypes in multi-environment trials. The grain yields of five lipoxygenase-free lines intended for human consumption of from the soybean breeding program of the Londrina State University and two commercial standards (BRS 257 and BMX Potência RR) were evaluated in four counties of the State of...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Glycine max; Bayesian inference; Genotype - environment; Functional food; Grain yield.
Ano: 2020
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902020000400417

Evaluation of Bayesian models for analysis of crude protein requirement for pigs of Brazilian Piau breed
Provedor de dados: 63
Autores: Silva,Hugo Teixeira; Silva,Fabyano Fonseca e; Ferreira,Aloízio Soares; Veroneze,Renata; Lopes,Paulo Sávio.
ABSTRACT: We evaluated the inclusion of information on genetic relationship into the analysis of crude protein requirement in diets for pigs of Brazilian Piau breed, using Bayesian inference. The animals were assigned to treatments in a completely randomized design in factorial scheme 4 × 2 (crude protein levels × sex) with 12 repetitions per treatment. The evaluations were carried out in the initial, growing and finishing phases, and after slaughter. The traits evaluated were feed conversion (FC), backfat thickness (BF), daily weight gain (DWG), daily feed intake (DFI) and some carcass cuts. Three models were considered to evaluate the inclusion of information on genetic relationship into the analysis: Model I, a simple linear model; Model II, the same...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Bayesian inference; Genetic relationship; Model selection; Performance.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162019001300208

Inferences on the effects of selection for feed conversion over meat quality traits in broiler
Provedor de dados: 63
Autores: Paiva,José Teodoro de; Mourão,Gerson Barreto; Ferraz,José Bento Sterman; Mattos,Elisângela Chicaroni; Michelan Filho,Tércio; Campos,Bárbara Machado; Eler,Joanir Pereira; Gaya,Leila de Genova.
ABSTRACT: The intense selection process for economic traits conducted by the poultry breeding programs has been caused several changes in broiler meat quality. A database belonging to a selection program of a broiler male line was used to estimate heritability and genetic correlations for feed conversion ratio and meat quality traits, which were: initial and final pH, lightness, drip loss, thawing loss and shear force. Two-trait analyses were performed and the components of co(variance) and genetic parameters were determined using the Bayesian approach and the GIBBS3F90 software. The heritability estimate found for feed conversion ratio (0.52) showed high influence of direct additive genetic effects on the expression of this trait; therefore, this trait is...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Bayesian inference; Animal breeding; Genetic correlation; Indirect selection.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162018000200129

Avaliação genética do ganho de peso e conversão alimentar de coelhos da raça Nova Zelândia Branco criados em ambientes diferenciados - DOI: 10.4025/actascianimsci.v32i1.6262
Provedor de dados: 2
Autores: 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

Influence of genotype-environment interaction on the classification of Nellore bulls in Southern Brazil
Provedor de dados: 2
Autores: 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

Phylogenetic relationships between Bacillus species and related genera inferred from 16s rDNA sequences
Provedor de dados: 58
Autores: 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