What This Document Is
This is a laboratory exercise designed to accompany a course in phylogenetics, ecology, and evolution. Specifically, it focuses on the application of coalescence theory – a core concept in understanding the relationship between gene trees and species trees. The lab utilizes the Mesquite software package to explore simulated evolutionary processes and compare them to real-world genetic data. It’s a hands-on exploration of how genetic variation arises and how lineages trace back to common ancestors.
Why This Document Matters
This resource is ideal for students enrolled in advanced undergraduate or graduate-level courses covering population genetics, molecular evolution, or phylogenetic analysis. It’s particularly beneficial when you’re seeking to solidify your understanding of how population structure influences genetic diversity and how to interpret discrepancies between gene trees and species trees. Accessing the full lab will equip you with practical skills in using bioinformatics tools and interpreting complex evolutionary relationships.
Topics Covered
* Coalescence Theory fundamentals
* Population tree simulation
* Gene tree reconstruction
* Association of alleles with populations
* The impact of population size on coalescence rates
* Comparing simulated and empirical gene trees
* Nexus file format for phylogenetic data
What This Document Provides
* A guided workflow for using Mesquite to simulate coalescence events.
* Instructions for establishing associations between populations and genetic alleles.
* An exploration of how to interpret the results of coalescence simulations.
* Contextual information on the underlying principles of coalescence theory.
* Insights into the relationship between population history and genetic variation.
* A framework for comparing theoretical models with real-world genetic data.