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fDesc[0] = "MrBayes is a program for Bayesian inference and model choice across a wide range of phylogenetic and evolutionary models. MrBayes uses Markov chain Monte Carlo (MCMC) methods to estimate the posterior distribution of model parameters.<br /> <br /> Program features include:<br /> <br /> A common command-line interface across Macintosh, Windows, and UNIX operating systems;<br /> Extensive help available from the command line;<br /> Analysis of nucleotide, amino acid, restriction site, and morphological data;<br /> Mixing of data types, such as molecular and morphological characters, in a single analysis;<br /> Easy linking and unlinking of parameters across data partitions;<br /> An abundance of evolutionary models, including 4 X 4, doublet, and codon models for nucleotide data and many of the standard rate matrices for amino acid data;<br /> Estimation of positively selected sites in a fully hierarchical Bayesian framework;<br /> Full integration of the BEST algorithms for the multi-species coalescent.<br /> Support for complex combinations of positive, negative, and backbone constraints on topologies;<br /> Model jumping across the GTR model space and across fixed rate matrices for amino acid data;<br /> Monitoring of convergence during the analysis, and access to a wide range of convergence diagnostics tools after the analysis has finished;<br /> Rich summaries of posterior samples of branch and node parameters printed to majority rule consensus trees in FigTree format;<br /> Implementation of the stepping-stone method for accurate estimation of model likelihoods for Bayesian model choice using Bayes factors;<br /> The ability to spread jobs over a cluster of computers using MPI (for Macintosh (OS X) and UNIX environments only);<br /> Support for the BEAGLE library, resulting in dramatic speedups for codon and amino acid models on compatible hardware (NVIDIA graphics cards);<br /> Checkpointing across all models, allowing the user to seemlessly extend a previous analysis or recover from a system crash;";

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