Irish Type III - Phylogram

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Introduction

A Phylogenetic tree or Phylogram, sometimes called the 'Tree of Life', shows the evolutionary relationships among various people that are believed to have a common ancestor. Each node with descendants represents the most recent common ancestor of the descendants, with edge lengths in our tree, corresponding to time estimates. Each node in a phylogenetic tree is called a taxonomic unit.

Although phylogenetic trees can provide evolutionary insight, they do have important limitations. Phylogenetic trees do not necessarily (and likely do not) represent actual evolutionary history. The data on which they are based is noisy and recombination and back mutations can all confound the analysis.

Analysis of Irish Type III

Presently (16 January 2011) the Irish Type III cluster has 179 haplotypes that consist of, at least, FTDNA's 67 markers. These data were taken and analyzed to produce this phylogram. Dean McGee's Y-DNA Comparison Utility was used to produce a text file containing the elative-mutations matrix data needed by the SplitTrees4 program for inferring phylogenies (evolutionary trees).

An extremely fast and simple-to-use free program, SplitsTrees4 is being used to construct the Phylogenetic tree for the Irish Type III cluster. Splitstree4 can be downloaded from www.splitstree.org

Citation:- D. H. Huson and D. Bryant Application of Phylogenetic Networks in Evolutionary Studies, Molecular Biology and Evolution, 23(2):254-267, 2006 and http://www.math.auckland.ac.nz/~bryant/Papers/04NeighborNet.pdf

For this exercise I have used the network form of the phylogram. (Last update - 16 January 2011).

Cautionary Note:- The tree gives some indication of how closely each of the families are related to one another but this method of time estimation is considered to only be reasonable in the longer term and relatively inaccurate in the shorter term.

Click Here to download the Network as a pdf file.

Another form of the "Tree of Life" using the same data is shown here.
Thanks are due to Alex Williamson for its preparation.
Click on the image for a larger pdf version.

Legal Notice:

Dennis Wright, Coordinator of the Irish Type III DNA Website, does not assume any legal liability or responsibility for the accuracy, completeness, or usefulness of any information on these pages, nor does he represent that its use would not infringe on privately owned rights. Further, Dennis Wright disclaims any and all warranties, express or implied, relating to this website and any information contained therein, including warranties as to the accuracy or completeness of the information. Dennis Wright shall not be liable for any damages of any kind, under any theory of liability, resulting from user's access to the website or use of any information contained therein.