Phylogenomics reshuffles the eukaryotic supergroups. Export

@article{citeulike:1718910, abstract = {BACKGROUND: Resolving the phylogenetic relationships between eukaryotes is an ongoing challenge of evolutionary biology. In recent years, the accumulation of molecular data led to a new evolutionary understanding, in which all eukaryotic diversity has been classified into five or six supergroups. Yet, the composition of these large assemblages and their relationships remain controversial. METHODOLOGY/PRINCIPLE FINDINGS: Here, we report the sequencing of expressed sequence tags (ESTs) for two species belonging to the supergroup Rhizaria and present the analysis of a unique dataset combining 29908 amino acid positions and an extensive taxa sampling made of 49 mainly unicellular species representative of all supergroups. Our results show a very robust relationship between Rhizaria and two main clades of the supergroup chromalveolates: stramenopiles and alveolates. We confirm the existence of consistent affinities between assemblages that were thought to belong to different supergroups of eukaryotes, thus not sharing a close evolutionary history. CONCLUSIONS: This well supported phylogeny has important consequences for our understanding of the evolutionary history of eukaryotes. In particular, it questions a single red algal origin of the chlorophyll-c containing plastids among the chromalveolates. We propose the abbreviated name 'SAR' (Stramenopiles+Alveolates+Rhizaria) to accommodate this new super assemblage of eukaryotes, which comprises the largest diversity of unicellular eukaryotes.}, address = {Department of Zoology and Animal Biology, University of Geneva, Geneva, Switzerland. Fabien.Burki@zoo.unige.ch}, author = {Burki, F. and Shalchian-Tabrizi, K. and Minge, M. and Skjaeveland, A. and Nikolaev, S. I. and Jakobsen, K. S. and Pawlowski, J.}, citeulike-article-id = {1718910}, citeulike-linkout-0 = {http://dx.doi.org/10.1371/journal.pone.0000790}, citeulike-linkout-1 = {http://view.ncbi.nlm.nih.gov/pubmed/17726520}, citeulike-linkout-2 = {http://www.hubmed.org/display.cgi?uids=17726520}, doi = {10.1371/journal.pone.0000790}, issn = {1932-6203}, journal = {PLoS ONE}, keywords = {4-supergroups, 6-supergroups, eukaryote-evolution, supergroups, tree-of-life}, number = {8}, posted-at = {2008-07-03 21:57:53}, priority = {2}, title = {Phylogenomics reshuffles the eukaryotic supergroups.}, url = {http://dx.doi.org/10.1371/journal.pone.0000790}, volume = {2}, year = {2007} }

TY - JOUR ID - citeulike:1718910 L3 - citeulike-article-id:1718910 N2 - BACKGROUND: Resolving the phylogenetic relationships between eukaryotes is an ongoing challenge of evolutionary biology. In recent years, the accumulation of molecular data led to a new evolutionary understanding, in which all eukaryotic diversity has been classified into five or six supergroups. Yet, the composition of these large assemblages and their relationships remain controversial. METHODOLOGY/PRINCIPLE FINDINGS: Here, we report the sequencing of expressed sequence tags (ESTs) for two species belonging to the supergroup Rhizaria and present the analysis of a unique dataset combining 29908 amino acid positions and an extensive taxa sampling made of 49 mainly unicellular species representative of all supergroups. Our results show a very robust relationship between Rhizaria and two main clades of the supergroup chromalveolates: stramenopiles and alveolates. We confirm the existence of consistent affinities between assemblages that were thought to belong to different supergroups of eukaryotes, thus not sharing a close evolutionary history. CONCLUSIONS: This well supported phylogeny has important consequences for our understanding of the evolutionary history of eukaryotes. In particular, it questions a single red algal origin of the chlorophyll-c containing plastids among the chromalveolates. We propose the abbreviated name 'SAR' (Stramenopiles+Alveolates+Rhizaria) to accommodate this new super assemblage of eukaryotes, which comprises the largest diversity of unicellular eukaryotes. IS - 8 JF - PLoS ONE SN - 1932-6203 AD - Department of Zoology and Animal Biology, University of Geneva, Geneva, Switzerland. Fabien.Burki@zoo.unige.ch TI - Phylogenomics reshuffles the eukaryotic supergroups. VL - 2 KW - 4-supergroups KW - 6-supergroups KW - eukaryote-evolution KW - supergroups KW - tree-of-life AU - Burki, F AU - Shalchian-Tabrizi, K AU - Minge, M AU - Skjaeveland, A AU - Nikolaev, SI AU - Jakobsen, KS AU - Pawlowski, J PY - 2007/// UR - http://dx.doi.org/10.1371/journal.pone.0000790 ER -