chloroplast and other genes (was Lucy in Newsweek)

Curtis Clark jcclark at CSUPOMONA.EDU
Thu Apr 1 21:29:07 CST 2004

At 20:41 2004-04-01, Ken Kinman wrote:
>      I have come to a similar conclusion.  Chloroplast genes are probably
> generally less reliable than nuclear genes for phylogeny reconstruction
> (although there are probably exceptions).  With respect to angiosperms in
> particular, I think phylogenies based on chloroplast genes may have been
> stretched beyond their reliability in some cases.

Incongruence between chloroplast and nuclear genomes often has *specific
meaning* relating to introgression, hybrid speciation, lineage sorting, and
other population-level phenomena. It's not that the chloroplast phylogenies
have been stretched beyond their reliability; rather their interpretation
has been stretched.

Curtis Clark        
Web Coordinator, Cal Poly Pomona                 +1 909 979 6371
Professor, Biological Sciences                   +1 909 869 4062

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