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Showing 1 to 20 of 38 for “"REML"”.
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Interação genótipos x ambientes via GGE Biplot/REML-BLUP em milho sob estresse nutricional
… foram submetidos a análises estatísticas via REML/BLUP (Máxima Verossimilhança Restrita/Melhor Preditor Linear Não Viesado) para a obtenção dos componentes de variância e as estimativas dos parâmetros genéticos e posteriormente submetido à análise via GGE Biplot. Foi possível concluir que a …
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A new REML (PX)EM algorithm for linear mixed models and factor analytic mixed models
… these models is residual maximum likelihood (REML). Most statistical software packages available for the REML estimation of parameters associated with linear mixed models and factor analytic mixed models implement a Newton-Raphson type algorithm such as the expected information algorithm or …
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A new REML (PX)EM algorithm for linear mixed models and factor analytic mixed models
… these models is residual maximum likelihood (REML). Most statistical software packages available for the REML estimation of parameters associated with linear mixed models and factor analytic mixed models implement a Newton-Raphson type algorithm such as the expected information algorithm or …
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Topics on animal model evaluations with an application to somatic cell score in dairy cattle
… was derived under certain conditions for REML using diagonal elements of the inverse coefficient matrix. To improve the convergence rate for REML estimation, a simple technique that does not require additional computations was presented. Limitations of the above two techniques were …
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A Bayesian solution to non-convergence of crossed random effects models
… (MLE) and restricted maximum likelihood (REML) estimation often encounter convergence problems, which in turn lead to researchers fitting simpler models (e.g., only random intercepts). If the random effect structure is too simple, tests of fixed effects are not valid; if the random effect …
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A Comparative Simulation Study of Robust Estimators of Standard Errors
… project compares restricted maximum likelihood (REML) with four robust estimation techniques: the Standard Robust Estimator (White 1980), the Long estimator (Long 2000), the Long estimator with a quantile adjustment (Kauermann 2001), and the empirical option of the MIXED procedure in SAS. The …
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Reproductive performance of dorset ewes in the star accelerated lambing system
… (LS) and restricted maximum likelihood (REML) procedures. First-exposure fertility was not heritable. heritabilities for fertility at first post-lambing exposure, first-lambing prolificacy, and second-lambing prolificacy were .191 ± .088 (LS) and .200 ± .132 (REML), .914 ± .091 (LS) and …
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Diversidade genética, ganhos com seleção e seleção genômica ampla na espécie Coffea arabica
… por meio de procedimentos de modelos mistos (REML/BLUP), por permitirem a estimação de parâmetros genéticos de forma acurada mesmo em situação de experimentos desbalanceados, têm se mostrado vantajosos. Finalmente, os métodos de seleção genômica ampla (GWS), que buscam conhecer as associações …
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Selecting the Best Linear Mixed Model Using Predictive Approaches
… for PRESS, CCC and R-squared. It suggested using REML likelihood function which has the determinant term for AIC and BIC. For CCC, R-squared, and the information criterion, there was no difference for the various parameter number adjustments. For autoregressive order 1 plus random effect, the …
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Choosing Between the Fixed-, Random-, and Mixed-Effects Model in Meta-Analysis: An Analysis of Existing and New Model Selection Methods
… estimators, the restricted maximum-likelihood (REML) estimator is found to be most efficient and has desirable statistical properties such as asymptotic efficiency. The REML estimator can be easily found via the Fisher scoring algorithm, which is robust to poor starting values and has good …
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Genetic Analysis of Sheep Discrete Reproductive Traits Using Simulation and Field Data
… applicability of restricted maximum likelihood (REML) in genetic analyses of categorical data was evaluated using simulation and field data. Four genetic models were used to simulate underlying phenotypic variates, which were derived as the sum of additive genetic and environmental effects (Model …
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Studies on Estimation of Genetic Variances Under Nonadditive Gene Action
… in objective (2): restricted maximum likelihood (REML) for normal data, and an extension thereof for threshold models. Asymptotic theory indicated that in a genetic model with additive, dominance and additive x additive effects, the most difficult parameter to estimate was the variance "due to" …
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Logistic growth curve parameter estimates for scrotal circumference and relationships with female reproduction in crossbred sheep
… mating behavior. Restricted maximum likelihood (REML) was used to estimate variance components for additive genetic, ewe, and litter effects in group two Jambs. Heritability estimates for wt at birth to 150 d ranged from .14 to .42. Heritabilities for sc and sc scaled to the 1/3 power of body …
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Syringomyelian perinnöllinen vaihtelu suomalaisilla cavalier kingcharlesinspanieleilla
… Varianssikomponentit estimoitiin eläinmallilla (REML-menetelmä). Ikä oli ainoa systemaattinen tekijä, joka vaikutti syringomyelian ilmenemiseen. Syringomyelian periytymisasteen arvioksi saatiin 0,21, joten syringomyelian yleisyyttä voidaan vähentää jalostusvalinnan avulla. …
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Variance Components of litter size in Icelandic farmed mink (Neovison vison)
… were employed, MCMC Gibbs sampler method and REML. The two different methods gave similar results. Heritability (0.03-0.06) and repeatability (0.08-0.16) was lower than in previous studies. EVA software was used to estimate pedigree structure. Average inbreeding was low (0.015). Data suggests …
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Fylgni svipfars í íslensku byggi
… gagna, þar sem dreifniþættir voru metnir með REML, og kynbótaspá Völu sem reiknað var 2023. Fylgni milli ára var metin með Pearson-fylgni og arfgengi í víðum skilningi reiknað út frá dreifniþáttum líkananna. Niðurstöður sýndu miðlungs fylgni milli ára fyrir hæð og skriðtíma. Fyrir hæð var …
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Grupos heteróticos e seleção recorrente recíproca em cana-de-açúcar
… genético-estatística foi realizada pelo método REML/BLUP. Os resultados revelaram que os efeitos não-aditivos foram predominantes para explicar a variação genética para os caracteres toneladas de cana por hectare (TCH), toneladas pol por hectare (TPH) e toneladas de fibra por hectare (TFH). Para …
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Estimation of genetic parameters for development of alternative selection criteria for increased litter size in Rambouillet sheep
… weight in Rambouillet sheep were estimated using REML (Restricted Maximum Likelihood) via an EM (Expectation-Maximization) type algorithm. Data were obtained from the University of Illinois Rambouillet flock located at the Dixon Springs Agricultural Center near Simpson, Illinois. There were 437 …
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Júgur- og spenaeiginleikar íslenskra kúa á öðru mjaltaskeiði
… og (sam)dreifnistuðlar metnir með AI-REML. Júgur- og spenabygging var að jafnaði slakari hjá kúm á öðru mjaltaskeiði. Erfðafylgni júgur- og spenaeiginleika milli fyrsta og annars mjaltaskeiðs var á bilinu 0,75-0,92 , hæst fyrir spenalengd og lægst fyrir spenaodd. Staðalskekkja …
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Eru keppniseiginleikar íslenska hestsins í alþjóðlega staðlaðri íþróttakeppni þeir sömu óháð landi?
… með DMU forritapakkanum með REML aðferðafræði. Erfðastuðlar keppniseiginleikanna voru metnir og innbyrðistengsl þeirra könnuð. Í stuttu máli var jákvæð og almennt há erfðafylgni á milli keppniseiginleikanna sem gefur til kynna að keppnishæfni er sameiginlegur erfðaþáttur …
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