Path: utzoo!utgpu!watserv1!watmath!att!pacbell.com!ucsd!ucbvax!ucdavis!ucdavis.edu!jhgillespie From: jhgillespie@ucdavis.edu Newsgroups: bionet.molbio.evolution Subject: Re: Some thoughts on what to do Message-ID: <8236@ucdavis.ucdavis.edu> Date: 25 Jan 91 20:52:19 GMT References: <4413.9101251737@crc.ac.uk> Sender: usenet@ucdavis.ucdavis.edu Organization: ucdavis Lines: 14 In article <4413.9101251737@crc.ac.uk> mbishop@crc.ac.uk (Martin Bishop) writes: >WHAT TO DO NEXT IN MOLECULAR PHYLOGENY RESEARCH > >Worry more about the processes by which molecular sequences change and >less about getting the most parsimonious (but incorrect tree). Here, here!! We have have known since '71 (Ohta and Kimura) that rates of substitution vary. We also know the the frequency of the four nucleotides vary through time. It is hard to imagine a characterization of the substitution process that is farther from those assumed by most tree-construction algorithms. John Gillespie