[Biopython-dev] Rerooting a tree with Bio.Phylo

Peter biopython at maubp.freeserve.co.uk
Sat Mar 27 12:45:28 UTC 2010


On Fri, Mar 26, 2010 at 11:38 AM, Cymon Cox <cy at cymon.org> wrote:
>
> I think the whole problem stems from only having a single outgroup (which
> when you root to it ends up 'looking' like the immediate ancestor of the
> ingroup). Typically, you would include multiple ougroups and present/display
> the tree with a trifurcating root node, one of which lineages is the ingroup
> - unless you are using a non-reversible model you dont need dichotomously
> rooted trees.
>

And I thought it would be simpler from this example to use a single
out group ;)

Thanks for the comments both of you.

Peter



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