Our Sponsors

Download BioinformaticsOnline(BOL) Apps in your chrome browser.


  • Bookmarks
  • Jit
  • slacTree: SVG Large Annotated Circular Tree drawing

slacTree: SVG Large Annotated Circular Tree drawing


A simple, extensible, Perl script for producing figures of large phylogenetic trees.

  • While there are many other tree drawing programs, slacTree was originally written in 2009 to fill a need for producing publication quality figures of circular trees with more than 1000 taxa with custom annotations
  • Because it is a single Perl script with very few dependencies, it is easy to run, and easy to further customize
  • SVG is used because it is a scalable format allowing for very small representations of entire trees or highly magnified regions with unlimited resolution
  • Circular and radial trees are more compact than linear representations