TESS 2.3: Bayesian Clustering using
tessellations and Markov models for spatial population genetics
TESS implements a Bayesian clustering algorithm for spatial population genetic analyses. It can perform
both individual geographical assignment and admixture analysis. It is designed for 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.
Download the latest version of TESS (Updated january 2010; includes dominant
Version 1.0: Chibiao Chen (2006) and Version 2.1+: Eric Durand (2007-2010)
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 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 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