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Proc Natl Acad Sci U S A. 2000 Nov 21;97(24):13166-71.

Independent and combined analyses of sequences from all three genomic compartments converge on the root of flowering plant phylogeny.

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  • 1Department of Biology, Institute of Molecular Evolutionary Genetics, and Life Sciences Consortium, Pennsylvania State University, University Park, PA 16802, USA.

Abstract

Plant phylogenetic estimates are most likely to be reliable when congruent evidence is obtained independently from the mitochondrial, plastid, and nuclear genomes with all methods of analysis. Here, results are presented from separate and combined genomic analyses of new and previously published data, including six and nine genes (8, 911 bp and 12,010 bp, respectively) for different subsets of taxa that suggest Amborella + Nymphaeales (water lilies) are the first-branching angiosperm lineage. Before and after tree-independent noise reduction, most individual genomic compartments and methods of analysis estimated the Amborella + Nymphaeales basal topology with high support. Previous phylogenetic estimates placing Amborella alone as the first extant angiosperm branch may have been misled because of a series of specific problems with paralogy, suboptimal outgroups, long-branch taxa, and method dependence. Ancestral character state reconstructions differ between the two topologies and affect inferences about the features of early angiosperms.

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PMID:
11069280
[PubMed - indexed for MEDLINE]
PMCID:
PMC27196
Free PMC Article

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