What This Document Is
This is a laboratory exercise designed to accompany a course in phylogenetics, ecology, and evolution. Specifically, it focuses on the principles and practical application of coalescence theory – a core concept in understanding the relationship between gene trees and species trees. It’s intended to be used in conjunction with the Mesquite software package to simulate and analyze evolutionary processes.
Why This Document Matters
This resource is ideal for students enrolled in advanced evolutionary biology or phylogenetics courses. It will be particularly helpful when you are working to understand how population history influences genetic variation and how gene trees can differ from the overall evolutionary history of a species. It’s best utilized during a lab session where you’re actively applying the concepts through simulation and data analysis, and will support your understanding of complex relationships between populations and their genetic makeup.
Topics Covered
* Coalescence theory and its underlying principles
* The relationship between population trees and gene trees
* The impact of population size and generations on coalescence patterns
* Establishing associations between different taxonomic groups (populations and alleles)
* Using Mesquite software for phylogenetic analysis and simulation
* Interpreting Nexus file formats for phylogenetic data
What This Document Provides
* A framework for simulating coalescent processes using Mesquite.
* Guidance on setting up and interpreting associations between populations and alleles.
* An exploration of how varying parameters (like population size) affect the resulting gene trees.
* Context for understanding the standard format of association blocks within Nexus files.
* A foundation for comparing observed gene trees to potential population histories.
