One way would be to label the root to make it a leaf, and apply NJ.
Neighbor-joining reconstructs the original branch lengths (and topology) given 
tree-distances between the leaves.

On Nov 30, 2016, at 10:30 AM, Juan Antonio Balbuena 
<<>> wrote:

Hi all

This is a simple question:

I have a set of ultrametric trees with information on their topology but 
without branch lengths. On a separate file, I have the distances of each node 
and leaf to the root. Can someone instruct me on how to to compute the branch 
lengths of the tree with these two separate bits of information?

Many thanks in advance

Juan A. Balbuena

Dr. Juan A. Balbuena
Cavanilles Institute of Biodiversity and Evolutionary Biology
University of Valencia                                   <>
P.O. Box 22085                                           <>
46071 Valencia, Spain
e-mail:<>    tel. +34 963 543 658   
 fax +34 963 543 733
NOTE! For shipments by EXPRESS COURIER use the following street address:
C/ Catedrático José Beltrán 2, 46980 Paterna (Valencia), Spain.
R-sig-phylo mailing list -<>
Searchable archive at

        [[alternative HTML version deleted]]

R-sig-phylo mailing list -
Searchable archive at

Reply via email to