MacClade

MacClade reconstructs patterns of character evolution on phylogenetic trees to analyze character change and test evolutionary hypotheses in systematics and evolutionary biology.

Key Features:

• Tree and character matrix input: Accepts a phylogenetic tree together with a matrix of character data for comparative analysis.
• Ancestral state reconstruction: Infers ancestral character states across branches of a phylogeny.
• Topology exploration: Supports manipulation and evaluation of alternative tree topologies to assess their effects on character reconstructions.
• Assumption and model variation: Provides options to vary assumptions underlying reconstructions to assess sensitivity to different evolutionary models.
• Data management and editing: Includes facilities for entering, editing, and managing phylogenetic trees and character data.
• Summarization outputs: Generates summaries of character evolution through charts and diagrams.

Scientific Applications:

• Character evolution analysis: Analyze how specific traits evolve across species or lineages using mapped character states on trees.
• Hypothesis testing: Test hypotheses about ancestral states and patterns of character change.
• Comparative phylogenetics: Evaluate and compare alternative phylogenetic hypotheses and their implications for trait evolution.
• Systematics and evolutionary biology: Apply detailed character-state mapping and comparative analyses in systematics and evolutionary biology research.

Methodology:

Performs ancestral state reconstruction from an input phylogenetic tree and character matrix, supports exploration of alternative tree topologies, and allows variation of assumptions underlying the reconstructions.