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Using jModelTest

These are written for use with jModelTest 2.1.4 running on a Mac

Running a basic quick analysis

Load alignment file

File->Load DNA Alignment and select alignment of interest

You can try this example file.

Compute likelihood scores for different models

Analysis->Compute likelihood scores

To run a very quick analysis, just choose

Likelihood settings

  • Number of substitution schemes->3
  • Base frequencies->check
  • Rate variation->uncheck both +I and +G
  • Base tree for likelihood calculations->Fixed BIONJ-JC

and then click "Compute likelihoods"

To include the GTR model in the scheme you need to run as above but using Base frequencies->check

Calculate selection criteria

For now we'll just use AIC

Analysis->Do AIC calculations...

then click "Do AIC calculations"

View results

Results->Show results table

Then choose the AIC tab.

The preferred models are those with the lower AICs; used very naievely, one would assume that the best model to take is the one with the lowest AIC.

Saving the results

Results->Build HTML log

will write an HTML output file containing the results of the analysis