Buscar
Mostrando ítems 1-10 de 2472
Imputation of non-genotyped individuals using genotyped progeny in Nellore, a Bos indicus cattle breed
(Elsevier B.V., 2014-08-01)
This study aimed at imputing non(un)-genotyped sires using a stepwise imputation approach that combines identity by descent (IBD) detection methods with other imputation algorithms. We also studied the effect of using ...
Use of Data Mining for Intelligent Evaluation of Imputation Methods
In real-world situations, researchers frequently face the difficulty of missing values (MV), i.e., values not observed in a data set. Data imputation techniques allow the estimation of MV using different algorithms, by ...
Genotype imputation in a tropical crossbred dairy cattle population
(2017-12-01)
The objective of this study was to investigate different strategies for genotype imputation in a population of crossbred Girolando (Gyr × Holstein) dairy cattle. The data set consisted of 478 Girolando, 583 Gyr, and 1,198 ...
Imputation accuracy to whole-genome sequence in Nellore cattle
(2021-12-01)
Background: A cost-effective strategy to explore the complete DNA sequence in animals for genetic evaluation purposes is to sequence key ancestors of a population, followed by imputation mechanisms to infer marker genotypes ...
On the influence of imputation in classification: practical issues
(TAYLOR & FRANCIS LTD, 2009)
The substitution of missing values, also called imputation, is an important data preparation task for many domains. Ideally, the substitution of missing values should not insert biases into the dataset. This aspect has ...
Assessing the accuracy of imputation in the gyr breed using different SNP panels
(2021-01-01)
The aim of this study was to evaluate the accuracy of imputation in a Gyr population using two medium- density panels (Bos taurus - Bos indicus) and to test whether the inclusion of the Nellore breed increases the imputation ...
Investigating the accuracy of imputing autosomal variants in Nellore cattle using the ARS-UCD1.2 assembly of the bovine genome
(2020-12-01)
Background: Imputation accuracy among other things depends on the size of the reference panel, the marker’s minor allele frequency (MAF), and the correct placement of single nucleotide polymorphism (SNP) on the reference ...
Use of data imputation tools to reconstruct incomplete air quality datasets: A case-study in Temuco, Chile
(Elsevier Ltd, 2019)
© 2018 Elsevier LtdMissing data from air quality datasets is a common problem, but is much more severe in small cities or localities. This poses a great challenge for environmental epidemiology as high exposures to pollutants ...
A new HLA imputation model for admixed samples: Testing imputation accuracy in Brazil
(Wiley-Blackwell, 2022-05-01)
A strategy to impute age at onset of a particular condition from external sources
(SAGE Publications Ltd, 2021)
© The Author(s) 2021.A key hypothesis in epidemiological studies is that time to disease exposure provides relevant information to be considered in statistical models. However, the initiation time of a particular condition ...