TESS 2.3: Bayesian Clustering using
tessellations and Markov models for spatial population genetics
TESS3: Fast inference of ancestry coefficients and genome scans for selection
TESS implements ancestry estimation algorithms for spatial population genetic analyses. The program performs individual geographical assignment, admixture analysis,
and can be used to run genome scans for selection. TESS is particularly suited to seeking genetic
discontinuities in continuous populations and estimating spatially varying individual admixture proportions.
TESS returns graphical displays of geographical cluster assignments or admixture proportions (depending on the model used) and textual output of the admixture Q matrix.
June 2015 -- New version TESS3: Faster and more accurate! Novelty: TESS3 runs genome scans for selection based on ancestral allele frequency differentiation statistics. Version 3: Kevin Caye (based on Eric Frichot's sNMF code).
- Download installation files, documentation and R scripts for visualizing results:
The program requires that Cmake is installed on your operating system
- Documentation and examples are available from the
Download the 2.3 version of TESS (Updated january 2010)
Version 1.0: Chibiao Chen (2006) and Version 2.1+: Eric Durand (2007-2010)
Graphical outputs using R
The reference manual, an example data set and R scripts are included in the TESS 2.3.1 package. For new users, we advice using the tessgui.exe
program first. We also advice using
CLUMPP and DISTRUCT for
post-processing the program outputs. The important quantities to look at are the admixture/membership coefficients.
Send feedback and comments or ask assistance:
- For tess3: K. Caye, T.M. Deist, H. Martins, O. Michel, O. François (2015) TESS3: Fast inference of spatial population structure and genome scans for selection, PDF, Molecular Ecology Resources, in press.
- For the admixture model: E. Durand, F. Jay, O.E. Gaggiotti, O. François (2009) Spatial inference of admixture proportions and secondary
contact zones, PDF, Molecular Biology and Evolution 26:1963-1973.
- For the graphic user interface and for comparisons with other programs: C. Chen, E. Durand, F. Forbes, O. François (2007) Bayesian clustering algorithms ascertaining spatial population
structure: A new computer program and a comparison study, PDF, Molecular Ecology Notes 7:747-756.
- A review on spatial clustering methods:
O. François, E. Durand (2010)
THE STATE OF THE ART - Spatially explicit Bayesian clustering models in population genetics
PDF Molecular Ecology Resources, 10: 773-784.
- For the R scripts visualizing Q matrices in Raster maps: F. Jay, S. Manel, N. Alvarez, EY Durand, W. Thuiller, R. Holderegger, P. Taberlet, O. François. Forecasting changes in population genetic structure of Alpine plants in response to global warming (2012). Molecular Ecology, 21 (10):2354-2368. Link to Molecular Ecology. Watch the supporting musical movie!
- For the hidden Markov Random Field model (without admixture): O. François, S. Ancelet, G. Guillot (2006) Bayesian
clustering using hidden Markov random fields in spatial population
genetics, PDF, Genetics, 174: 805-816.
- Supporting Material for Chen et al. (2007)
PDF, and the five and two-island data used in the simulation study
five island data ,
eric dot durand at berkeley dot edu
olivier dot francois at imag dot fr