Carla Ann Hass CAH19 at
Fri Aug 25 12:40:06 EST 1995

>Neighbor Joining is NOT a good tree building method. If you change the order o

>input of taxa, you change the tree.

   What is your reference for this statement?  I have "built" lots of neighbor-
joining tress using both MEGA and other programs and have never found this to
be true.  Also, someone mentioned that distances assume rate constancy.  That
is not true.  Some tree-building algorithms (UPGMA) do, but that is different.
Neighbor joining certainly allows different rates of evolution in different

 Carla Hass
 Penn State

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