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A Practical Guide to Phylogenetics for Nonexperts

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Published on: February 5, 2014

VIRI: a visualization tool for tree reconciliations.

Maurizio Patrignani¹, Giordano Dionisi², Blerina Sinaimeri³

¹Department of Civil, Computer and Aeronautical Engineering, Roma Tre University, Via della Vasca Navale 79, 00146, Rome, Italy.

BMC Bioinformatics

|October 8, 2025

Summary

This summary is machine-generated.

VIRI is a new tool that visualizes host-symbiont coevolutionary patterns. It offers clear, interpretable tree reconciliations, aiding biologists in understanding evolutionary relationships and comparing multiple scenarios efficiently.

Keywords:

Space-filling approach Tree reconciliation Visualization tool

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Area of Science:

Computational biology
Evolutionary biology
Bioinformatics

Background:

Cophylogeny reconciliation analyzes host-symbiont coevolution by mapping symbiont phylogenies onto host phylogenies.
Visualizing these reconciliations is crucial for identifying coevolutionary patterns like duplications, co-speciation, host-switches, and extinctions.
Effective visualization aids in comparing multiple optimal solutions for complex evolutionary scenarios.

Purpose of the Study:

Introduce VIRI (visual inspector of reconciliation instances), a novel software for visualizing cophylogeny reconciliations.
Provide biologists with a tool for clearer interpretation of host-symbiont evolutionary relationships.
Facilitate comparison of different reconciliation scenarios for the same host-symbiont pair.

Main Methods:

VIRI employs a hybrid visualization metaphor combining space-filling (host trees) and node-link (symbiont trees) approaches.
Implements algorithms for clear, top-down tree reconciliation layouts.
Preserves user's mental map across visualizations by maintaining a consistent host tree layout.

Main Results:

VIRI generates unambiguous and interpretable visualizations of tree reconciliations.
A novel feature is the consistent shared host tree layout, enabling direct comparison of multiple reconciliations.
The tool aims for crossing-free visualizations and allows data storage and download of visualizations.

Conclusions:

VIRI provides an efficient method for producing clear and easy-to-read tree reconciliation visualizations.
The software is freely available, supporting accessibility for the scientific community.
VIRI enhances the understanding of host-symbiont coevolutionary dynamics through improved visualization.