Running beast for the first time this tutorial will guide you through running beast and some of its accessory programs to do a simple phylogenetic analysis If you haven’t already, download and install beast following these instructions. It can be used as a method of reconstructing phylogenies but is also a framework for testing evolutionary hypotheses without conditioning on a single tree topology Beast | bayesian evolutionary analysis sampling trees This is the main program that takes a control file generated by beauti and performs the analysis. Treeannotator is a program to summarize the information from a sample of trees produced by beast onto a single “target” tree
The summary information includes the posterior probabilities of the nodes in the target tree, the posterior estimates and hpd limits of the node heights and (in the case of a relaxed molecular clock model) the rates. The current version of beagle will only work with beast v1.6 or later downloading and installing beagle. To inform beauti/beast about the sampling dates of the sequences, go to the tips menu and select the “use tip dates” option By default all the taxa are assumed to have a date of zero (i.e The sequences are assumed to be sampled at the same time Beast considers the present or most recent sampling time as time 0).
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