Results 1 to 10 of about 785,074 (201)

Genetic heterogeneity of residual variance in broiler chickens [PDF]

Genetics Selection Evolution, 2006
Aims were to estimate the extent of genetic heterogeneity in environmental variance. Data comprised 99 535 records of 35-day body weights from broiler chickens reared in a controlled environment.
Hill William G, Avendaño Santiago, White Ian MS, Rowe Suzanne J   +3 more
doaj   +7 more sources

QTL Mapping on a Background of Variance Heterogeneity

G3: Genes, Genomes, Genetics, 2018
Standard QTL mapping procedures seek to identify genetic loci affecting the phenotypic mean while assuming that all individuals have the same residual variance.
Robert W. Corty, William Valdar
doaj   +2 more sources

Genetic heterogeneity of residual variance - estimation of variance components using double hierarchical generalized linear models

Genetics Selection Evolution, 2010
Background The sensitivity to microenvironmental changes varies among animals and may be under genetic control. It is essential to take this element into account when aiming at breeding robust farm animals.
Fikse Freddy, Felleki Majbritt, Rönnegård Lars, Mulder Herman A, Strandberg Erling   +4 more
doaj   +2 more sources

Variance heterogeneity analysis for detection of potentially interacting genetic loci: method and its limitations [PDF]

BMC Genetics, 2010
Background Presence of interaction between a genotype and certain factor in determination of a trait's value, it is expected that the trait's variance is increased in the group of subjects having this genotype.
van Duijn Cornelia, Witteman Jacqueline CM, Dehghan Abbas, Struchalin Maksim V, Aulchenko Yurii S   +4 more
doaj   +8 more sources

Genetic and environmental heterogeneity of residual variance of weight traits in Nellore beef cattle

Genetics Selection Evolution, 2012
Background Many studies have provided evidence of the existence of genetic heterogeneity of environmental variance, suggesting that it could be exploited to improve robustness and uniformity of livestock by selection.
Neves Haroldo HR, Carvalheiro Roberto, Queiroz Sandra A   +2 more
doaj   +2 more sources

Stochasticity, heterogeneity, and variance in longevity in human populations.

Theor Popul Biol, 2017
Hartemink N, Missov TI, Caswell H.
europepmc   +2 more sources

Heterogeneity in response to repeated intranasal oxytocin in schizophrenia and autism spectrum disorders: A meta‐analysis of variance

British Journal of Pharmacology, 2021
Intranasal oxytocin (OT) has been suggested as a putative adjunctive treatment for patients with schizophrenia and autism spectrum disorders (ASD). Here, we examine available evidence from trials investigating the effects of repeated administrations of ...
D. Martins, Maria Paduraru, Y. Paloyelis
semanticscholar   +1 more source

Detecting Heterogeneity of Intervention Effects Using Analysis and Meta-analysis of Differences in Variance Between Trial Arms

Epidemiology, 2021
Supplemental Digital Content is available in the text. Background: Randomized controlled trials (RCTs) with continuous outcomes usually only examine mean differences in response between trial arms.
Harriet L Mills, J. Higgins, Richard W. Morris, D. Kessler, J. Heron, N. Wiles, G. Davey Smith, K. Tilling   +7 more
semanticscholar   +1 more source

Estimation of noise-free variance to measure heterogeneity. [PDF]

PLoS ONE, 2015
Variance is a statistical parameter used to characterize heterogeneity or variability in data sets. However, measurements commonly include noise, as random errors superimposed to the actual value, which may substantially increase the variance compared to
Tilo Winkler, Marcos F Vidal Melo, Luiza H Degani-Costa, R Scott Harris, John A Correia, Guido Musch, Jose G Venegas   +6 more
doaj   +1 more source

Is it worth it to personalize the treatment of PTSD? - A variance-ratio meta-analysis and estimation of treatment effect heterogeneity in RCTs of PTSD.

Journal of Anxiety Disorders, 2022
Several evidence-based treatments for posttraumatic stress disorder (PTSD) are recommended by international guidelines (e.g., APA, NICE). While their average effects are in general high, non-response rates indicate differential treatment effects.
P. Herzog, T. Kaiser
semanticscholar   +1 more source