TAGster | National Institute of Environmental Health Sciences
Source: https://www.niehs.nih.gov/research/resources/software/epidemiology/tagster
Archived: 2026-04-23 17:11
TAGster | National Institute of Environmental Health Sciences
Skip Navigation
TAGster
Close the left navigation
Add
TAGster: Single or Multi-Population Tag SNPs Selection, Evaluation and Visualization
Developed by:
Epidemiology
and
Biostatistics & Computational Biology
Branches
National Institute of Environmental Health
Division of Intramural Research
Epidemiology Branch
Molecular and Genetic Epidemiology Group
TAGster is a tool to select, evaluate and visualize LD tag SNPs for single or multiple populations. The input files can be a set of dumped genotype files from
Seattle SNPs
(Prettybase format). The output is a set of LD tag SNPs for single or multiple populations.
The TAGster also creates figures for LD structure and genotype data with many customized tracks to facilitate investigators visually checking and optimizing tag SNPs.
The TAGster uses composite linkage disequilibrium (CLD) coefficient or r2 to measure patterns of linkage disequilibrium between polymorphic sites in a genome region within each of multiple populations, and employs 3 methods to select LD tag SNPs:
A greedy algorithm to select a set containing a near-minimal number of LD tag SNPs for a single or multiple populations
A computation efficient exhaustive method to select minimal number of tag SNPs for a single population
A two-stage optimal method to select a set of near-minimal number of tag SNPs for multiple populations
Downloads
Windows Binary:
tagster_win.zip
(1MB)
Linux Binary:
tagster_linux.zip
(1MB)
Macintosh Binary:
tagster_mac.zip
(2MB)
Software Manual
Detailed Algorithms
Evaluation Results
Tagster Tutorial
Source code: please contact
Jack Taylor
Credits
The TAGster was developed in and is maintained at the NIEHS by Zongli Xu, Norman L. Kaplan and Jack A Taylor.
Reference
Xu Z, Kaplan NL, Taylor JA. TAGster: efficient selection of LD tag SNPs in single or multiple populations. Bioinformatics. 2007 23:3254-5. Epub 2007 Sep 7.
Installation
The TAGster is written in
Perl
and
R
programming language, It can be run on Linux, Macintosh, or Microsoft Windows operating system with
R
installed.
Contact
Jack A. Taylor, M.D., Ph.D. (Retired)
Scientist Emeritus
Tel 984-287-3684
[email protected]
Zongli Xu, Ph.D.
Staff Scientist
Tel 984-287-3730
[email protected]
Related Links
Biostatistics & Computational Biology Branch
Epidemiology Branch
SNPinfo Web Server
Back
to Top
Last Reviewed: March 30, 2026
Skip Navigation
TAGster
Close the left navigation
Add
TAGster: Single or Multi-Population Tag SNPs Selection, Evaluation and Visualization
Developed by:
Epidemiology
and
Biostatistics & Computational Biology
Branches
National Institute of Environmental Health
Division of Intramural Research
Epidemiology Branch
Molecular and Genetic Epidemiology Group
TAGster is a tool to select, evaluate and visualize LD tag SNPs for single or multiple populations. The input files can be a set of dumped genotype files from
Seattle SNPs
(Prettybase format). The output is a set of LD tag SNPs for single or multiple populations.
The TAGster also creates figures for LD structure and genotype data with many customized tracks to facilitate investigators visually checking and optimizing tag SNPs.
The TAGster uses composite linkage disequilibrium (CLD) coefficient or r2 to measure patterns of linkage disequilibrium between polymorphic sites in a genome region within each of multiple populations, and employs 3 methods to select LD tag SNPs:
A greedy algorithm to select a set containing a near-minimal number of LD tag SNPs for a single or multiple populations
A computation efficient exhaustive method to select minimal number of tag SNPs for a single population
A two-stage optimal method to select a set of near-minimal number of tag SNPs for multiple populations
Downloads
Windows Binary:
tagster_win.zip
(1MB)
Linux Binary:
tagster_linux.zip
(1MB)
Macintosh Binary:
tagster_mac.zip
(2MB)
Software Manual
Detailed Algorithms
Evaluation Results
Tagster Tutorial
Source code: please contact
Jack Taylor
Credits
The TAGster was developed in and is maintained at the NIEHS by Zongli Xu, Norman L. Kaplan and Jack A Taylor.
Reference
Xu Z, Kaplan NL, Taylor JA. TAGster: efficient selection of LD tag SNPs in single or multiple populations. Bioinformatics. 2007 23:3254-5. Epub 2007 Sep 7.
Installation
The TAGster is written in
Perl
and
R
programming language, It can be run on Linux, Macintosh, or Microsoft Windows operating system with
R
installed.
Contact
Jack A. Taylor, M.D., Ph.D. (Retired)
Scientist Emeritus
Tel 984-287-3684
[email protected]
Zongli Xu, Ph.D.
Staff Scientist
Tel 984-287-3730
[email protected]
Related Links
Biostatistics & Computational Biology Branch
Epidemiology Branch
SNPinfo Web Server
Back
to Top
Last Reviewed: March 30, 2026