Bootstrap trees and PAUP
joe at evolution.genetics.washington.edu
Sun May 23 12:51:44 EST 1999
In article <7i2a9r$3v6 at net.bio.net>,
Mark Dowton <Mark_Dowton at uow.edu.au> wrote:
>... One problem with this is that if some replicates
>generate many equally parsimonious trees (say 100), while others only
>generate a single (or a few) most parsimonious tree(s), the maj. rule tree
>will be overly influenced by those replicates in which many equally
>parsimonious trees are found.
>I was under the impression that this was also a problem (although
>admittedly minor in most cases) with the bootstrap tree, but a friend
>tells me that the PAUP bootstrap tree corrects this. Is this the case?
I am virtually certain that PAUP corrects for this (I know that PHYLIP
does too). One counts the trees when there are 100 of them as 0.01 of
a tree each, in doing the consensus tree.
Joe Felsenstein joe at genetics.washington.edu
Dept. of Genetics, Univ. of Washington, Box 357360, Seattle, WA 98195-7360 USA
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