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Visualizing Phylogenetic Trees: Algorithms and Visual Comparison Techniques

This paper is about visualizing tree structured data. In particular, the emphasis is on visualizing the similarities and differences between pairs of trees. The impetus for the work comes from the field of bioinformatics, where biologists construct complex phylogenetic trees to represent the evolution of species or genes. The two main issues that arise when comparing these data is to know how to efficiently and effectively compare phylogenetic trees, and how to visually present the results of the comparison. The primary approach is to present a new framework for tree structure visualization techniques that will display pairs of trees “face to face” with leaf nodes aligned. The results show that a combination of automatic and manual rearrangement is often effective in rapidly generating an arrangement that facilitates tree comparison, even for quite large trees.