MBASR

MBASR performs ancestral state reconstruction of discrete traits on phylogenetic trees using Bayesian inference via MrBayes within the R environment.

Key Features:

• Ancestral state reconstruction (discrete traits): Implements reconstruction of discrete character states at internal nodes based on observed traits at the tips of a phylogeny.
• Bayesian inference via MrBayes: Uses Bayesian methods implemented in MrBayes to estimate ancestral state probabilities and model uncertainty.
• Integration with R: Operates within the R environment to coordinate input data handling, execution of MrBayes, and output processing.
• Input handling: Accepts a phylogenetic tree together with observed trait data for taxa at the tips as the primary inputs.
• Statistical outputs: Produces node-level state probability summaries enabling interpretation of character evolution patterns.

Scientific Applications:

• Comparative biology: Reconstructs ancestral character states to support comparative analyses across taxa.
• Trait evolution studies: Investigates how discrete traits have evolved over time across lineages using probabilistic ancestral estimates.
• Evolutionary history inference: Informs hypotheses about evolutionary relationships and character transitions among species.

Methodology:

MBASR takes a phylogenetic tree and observed trait data for taxa at the tips and models ancestral states at internal nodes using Bayesian inference implemented in MrBayes.