FIGURE 4. Phylogenetic diversity of bacteria and archaea on the basis of SSU rRNA genes.

From the following article:

A phylogeny-driven genomic encyclopaedia of Bacteria and Archaea

Dongying Wu, Philip Hugenholtz, Konstantinos Mavromatis, Rüdiger Pukall, Eileen Dalin, Natalia N. Ivanova, Victor Kunin, Lynne Goodwin, Martin Wu, Brian J. Tindall, Sean D. Hooper, Amrita Pati, Athanasios Lykidis, Stefan Spring, Iain J. Anderson, Patrik D’haeseleer, Adam Zemla, Mitchell Singer, Alla Lapidus, Matt Nolan, Alex Copeland, Cliff Han, Feng Chen, Jan-Fang Cheng, Susan Lucas, Cheryl Kerfeld, Elke Lang, Sabine Gronow, Patrick Chain, David Bruce, Edward M. Rubin, Nikos C. Kyrpides, Hans-Peter Klenk & Jonathan A. Eisen

Nature 462, 1056-1060(24 December 2009)

doi:10.1038/nature08656

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Using a phylogenetic tree of unique SSU rRNA gene sequences7, phylogenetic diversity was measured for four subsets of this tree: organisms with sequenced genomes pre-GEBA (blue), the GEBA organisms (red), all cultured organisms (dark grey), and all available SSU rRNA genes (light grey). For each subtree, taxa were sorted by their contribution to the subtree phylogenetic diversity30 and the cumulative phylogenetic diversity was plotted from maximal (left) to the least (right). The inset magnifies the first 1,500 organisms. Comparison of the plots shows the phylogenetic ‘dark matter’ left to be sampled.

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