publication . Other literature type . Article . 1999

Phylogenetic Classification and the Universal Tree

W. F. Doolittle;
  • Published: 25 Jun 1999
  • Publisher: American Association for the Advancement of Science (AAAS)
Abstract
From comparative analyses of the nucleotide sequences of genes encoding ribosomal RNAs and several proteins, molecular phylogeneticists have constructed a “universal tree of life,” taking it as the basis for a “natural” hierarchical classification of all living things. Although confidence in some of the tree's early branches has recently been shaken, new approaches could still resolve many methodological uncertainties. More challenging is evidence that most archaeal and bacterial genomes (and the inferred ancestral eukaryotic nuclear genome) contain genes from multiple sources. If “chimerism” or “lateral gene transfer” cannot be dismissed as trivial in extent or...
Subjects
free text keywords: Multidisciplinary, Bacterial genome size, Phylogenetics, Genetics, Evolutionary biology, Phylogenetic tree, Phylogenetic nomenclature, Tree of life, Horizontal gene transfer in evolution, Nuclear gene, Biology, Last universal ancestor
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publication . Other literature type . Article . 1999

Phylogenetic Classification and the Universal Tree

W. F. Doolittle;