Untangling the early diversification of eukaryotes: a phylogenomic study of the evolutionary origins of Centrohelida, Haptophyta and Cryptista

Fabien Burki, Maia Kaplan, Denis V. Tikhonekov, Vasily Zlatogursky, Bui Quang Minh, Liudmila V. Radaykina, Alexey Smirnov, Alexander P. Mylnikov, Patrick J. Keeling

Research output: Contribution to journalArticlepeer-review

147 Scopus citations

Abstract

Assembling the global eukaryotic tree of life has long been a major effort of Biology. In recent years, pushed by the new availability of genome-scale data for microbial eukaryotes, it has become possible to revisit many evolutionary enigmas. However, some of the most ancient nodes, which are essential for inferring a stable tree, have remained highly controversial. Among other reasons, the lack of adequate genomic datasets for key taxa has prevented the robust reconstruction of early diversification events. In this context, the centrohelid heliozoans are particularly relevant for reconstructing the tree of eukaryotes because they represent one of the last substantial groups that was missing large and diverse genomic data. Here, we filled this gap by sequencing high-quality transcriptomes for 4 centrohelid lineages, each corresponding to a different family. Combining this new data with a broad eukaryotic sampling, we produced a gene-rich taxon-rich phylogenomic dataset that enabled us to refine the structure
Original languageEnglish
Pages (from-to)1-10
JournalProceedings of the Royal Society B: Biological Sciences
Volume283
DOIs
StatePublished - 2016

Keywords

  • phylogenomics
  • eukaryotes
  • centrohelids
  • tree of life
  • plastid evolution

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