Visual Linkage and Interactive Features of Evidente for an Enhanced Analysis of SNP-based Phylogenies

Abstract

Phylogenetic trees of a set of bacterial strains are often used to analyze their evolutionary relationships and they are commonly based on genomic features, such as single nucleotide polymorphisms (SNPs). Evidente - a recently published tool - provides visual and analytical linkage across a phylogenetic tree, SNP data and metadata, and integrates them into one interactive visual analytics platform. In contrast to other approaches, Evidente shows how SNPs agree with the tree structure. Evidente is part of the TueVis server (https://evidente-tuevis.cs.uni-tuebingen.de/). Here, we give an overview of the tasks supported by Evidente. The version of Evidente described in the publication can seamlessly visualize up to 150 strains. Thus, we introduce further enhancements for larger trees, such as data-driven aggregation and semantic zooming.