Results 41 to 50 of about 7,497,770 (317)

A variance components factor model for genetic association studies: a Bayesian analysis.

, 2010
Studies of gene-trait associations for complex diseases often involve multiple traits that may vary by genotype groups or patterns. Such traits are usually manifestations of lower-dimensional latent factors or disease syndromes.
Nonyane, BAS, Whittaker, JC
core   +1 more source

Testing multiple variance components in linear mixed-effects models.

Biostatistics, 2013
Testing zero variance components is one of the most challenging problems in the context of linear mixed-effects (LME) models. The usual asymptotic chi-square distribution of the likelihood ratio and score statistics under this null hypothesis is ...
Reza Drikvandi, G. Verbeke, A. Khodadadi, V. Partovi Nia   +3 more
semanticscholar   +1 more source

Population and species neighbor identity impact trait–trait relationships and plant performance

Population Ecology, EarlyView.
We evaluated how populations and species identity influence plant performance and trait outcomes in mixtures, and assessed trait variation among populations of two forb species native to the western United States (Dieteria canescens and Heterotheca villosa) following three interaction treatments (single‐population monoculture, two‐population mixture ...
Alicia J. Foxx, Florian Fort, Andrea T. Kramer   +2 more
wiley   +1 more source

Estimation of genetic variation in residual variance in female and male broiler chickens [PDF]

, 2008
In breeding programs, robustness of animals and uniformity of end product can be improved by exploiting genetic variation in residual variance. Residual variance can be defined as environmental variance after accounting for all identifiable effects.
A. Vereijken, Akaike, Bolet, Cardin, Falconer, Garreau, Gilmour, Gutierrez, H.A. Mulder, Hill, Hohenboken, Ibanez-Escriche, Ibanez-Escriche, Kaufman, Lidauer, Mackay, Mulder, Mulder, Odegard, R.F. Veerkamp, Rendel, Ros, Rowe, SanCristobal-Gaudy, SanCristobal-Gaudy, Schwarz, Sorensen, W.G. Hill, Wilks, Wolc   +29 more
core   +4 more sources

Variance components model with disequilibria [PDF]

European Journal of Human Genetics, 2006
The variance components (VC) model has been popular for genetic analysis. It has received wide applications in a variety of genetic practices, and been extended to various forms for different settings. However, most of the existing VC models are, explicitly or implicitly, under the assumption of the Hardy-Weinberg and/or linkage equilibria, which is ...
Charles N. Rotimi, George E Bonney, Ao Yuan, Qi Yang, Guanjie Chen   +4 more
openaire   +2 more sources

Effects of chronic browsing on life‐history traits of an irruptive large herbivore population

Population Ecology, EarlyView.
This study aimed to determine the relationship between diet quality, body mass, and size (hind foot length), and female reproduction and sought to identify the mechanism by which high density under severe food limitations is maintained. Our results demonstrated that sika deer introduced to Nakanoshima Island have maintained high densities through high ...
Koichi Kaji, Kazutaka M. Takeshita, Hiroshi Takahashi, Hiromasa Igota, Mayumi Ueno, Yukiko Matsuura, Takashi Ikeda, Ryo Yoshizawa, Hino Takafumi, Tsuyoshi Yoshida   +9 more
wiley   +1 more source

Optimal Designs For the Restricted Maximum Likelihood Estimators in a Random Split-Plot Model

Lithuanian Journal of Statistics, 2017
The design effect for the restricted maximum likelihood estimators of variance components in acompletely randomized split-plot model is studied. The model was used to represent the response generated froman experimental scenario where the whole-plot and
Oluwole Nuga, G. N. Amahia, Fatai Salami
doaj   +1 more source

Physical appearance perfectionism explains variance in eating disorder symptoms above general perfectionism [PDF]

, 2015
Physical appearance perfectionism is a domain-specific form of perfectionism comprising two components: hope for perfection and worry about imperfection (Yang & Stoeber, 2012).
Bardone-Cone, Bardone-Cone, Chan, Chang, Chen, Choo, Dunn, Dunn, Dunn, Egan, Enns, Fairburn, Flett, Frost, Frost, Garner, Haase, Haase, Haase, Hewitt, Hewitt, Hill, Hill, Hongfei Yang, Joachim Stoeber, Landa, Lombardo, McArdle, Minarik, Nunnally, Peixoto-Plácido, Sherry, Slade, Slaney, Slaney, Snell, Soares, Stoeber, Stoeber, Stoeber, Tabachnick, Terry-Short, Wade, Welch, Yang, Yang, Yang, Zhu   +47 more
core   +1 more source

Variance components models for gene-environment interaction in twin analysis.

Twin research : the official journal of the International Society for Twin Studies, 2002
Gene-environment interaction is likely to be a common and important source of variation for complex behavioral traits. Often conceptualized as the genetic control of sensitivity to the environment, it can be incorporated in variance components twin ...
S. Purcell
semanticscholar   +1 more source

COSMIC Variance in Binary Population Synthesis [PDF]

Astrophysical Journal, 2019
The formation and evolution of binary stars are critical components of several fields in astronomy. The most numerous sources for gravitational wave observatories are inspiraling or merging compact binaries, while binary stars are present in nearly every
K. Breivik, S. Coughlin, M. Zevin, C. Rodriguez, K. Kremer, Claire S. Ye, J. Andrews, M. Kurkowski, Matthew C. Digman, S. Larson, F. Rasio   +10 more
semanticscholar   +1 more source