نتایج جستجو برای: genotype imputation

تعداد نتایج: 107592  

Genotype imputation from low-density to high-density (SNP) chips is an important step before applying genomic selection, because denser chips can provide more reliable genomic predictions. In the current research, the accuracy of genotype imputation from low and moderate-density panels (5K and 50K) to high-density panels in the purebred and crossbred populations was assessed. The simulated popu...

Journal: :Annual Review of Genomics and Human Genetics 2009

Journal: :علوم دامی ایران 0
محمد صاحب هنر پردیس کشاورزی و منابع طبیعی دانشگاه تهران، کرج، ایران محمد مرادی شهربابک استاد پردیس کشاورزی و منابع طبیعی دانشگاه تهران، کرج، ایران سید رضا میرایی آشتیانی استاد پردیس کشاورزی و منابع طبیعی دانشگاه تهران، کرج، ایران عباس پاکدل دانشیار پردیس کشاورزی و منابع طبیعی دانشگاه تهران، کرج، ایران دورین جی. گریک استاد گروه علوم دامی، دانشگاه ایالتی آیوا، ایمز، ایالات متحدۀ امریکا

in this study, effect of two genotype imputation strategies, relatedness between reference panel and test populations and minor allele frequency on imputation error rate were examined with using a stochastic simulated population. reference panel and test populations were composed of 1,000 and 500 individuals, respectively. individuals in the reference panel were genotyped with using a high and ...

Journal: :Annual review of genomics and human genetics 2009
Yun Li Cristen Willer Serena Sanna Gonçalo Abecasis

Genotype imputation is now an essential tool in the analysis of genome-wide association scans. This technique allows geneticists to accurately evaluate the evidence for association at genetic markers that are not directly genotyped. Genotype imputation is particularly useful for combining results across studies that rely on different genotyping platforms but also increases the power of individu...

2013
Donghyung Lee T. Bernard Bigdeli Brien P. Riley Ayman H. Fanous Silviu-Alin Bacanu

MOTIVATION Genotype imputation methods are used to enhance the resolution of genome-wide association studies, and thus increase the detection rate for genetic signals. Although most studies report all univariate summary statistics, many of them limit the access to subject-level genotypes. Because such an access is required by all genotype imputation methods, it is helpful to develop methods tha...

The objective of this study was to investigate the role of genetic relationships between training and validation set with considering different ratio of phenotypic records of training set on accuracy of genomic prediction via animal models containing genotype × environment interactions in simulated imputation data. For this purpose, four different scenarios using 15k density containing differen...

2015
Daniel Money Kyle Gardner Zoë Migicovsky Heidi Schwaninger Gan-Yuan Zhong Sean Myles

Obtaining genome-wide genotype data from a set of individuals is the first step in many genomic studies, including genome-wide association and genomic selection. All genotyping methods suffer from some level of missing data, and genotype imputation can be used to fill in the missing data and improve the power of downstream analyses. Model organisms like human and cattle benefit from high-qualit...

2014
Yong-Bi Fu

Genotyping by sequencing (GBS) recently has emerged as a promising genomic approach for assessing genetic diversity on a genome-wide scale. However, concerns are not lacking about the uniquely large unbalance in GBS genotype data. Although some genotype imputation has been proposed to infer missing observations, little is known about the reliability of a genetic diversity analysis of GBS data, ...

2014
Yong-Bi Fu

17 Genotyping by sequencing (GBS) has recently emerged as a promising genomic approach for 18 assessing genetic diversity on a genome-wide scale. However, concerns are not lacking about the 19 uniquely large unbalance in GBS genotype data. While some genotype imputation has been 20 proposed to infer missing observations, little is known about the reliability of a genetic diversity 21 analysis o...

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