Delineating closely related dinoflagellate lineages using phylotranscriptomics

6 pages, 2 figures, supporting information https://doi.org/10.1111/jpy.12748 Recently radiated dinoflagellates Apocalathium aciculiferum (collected in Lake Erken, Sweden), Apocalathium malmogiense (Baltic Sea) and Apocalathium aff. malmogiense (Highway Lake, Antarctica) represent a lineage with an u...

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Bibliographic Details
Published in:Journal of Phycology
Main Authors: Annenkova, Nataliia V., Ahrén, Dag, Logares, Ramiro, Kremp, Anke, Rengefors, Karin
Other Authors: Gordon and Betty Moore Foundation, Swedish Research Council, Russian Foundation for Basic Research
Format: Article in Journal/Newspaper
Language:unknown
Published: Phycological Society of America 2018
Subjects:
Internal transcribed spacer-2
ITS2
Cytochrome b
COB
Bootstrap support
BS
Protists
Adaptive radiation
Transcriptomes
Phylogenomics
Microalgae
High Throughput Sequencing
Highway Lake
Antarc*
Antarctica
Online Access:http://hdl.handle.net/10261/169795
https://doi.org/10.1111/jpy.12748
https://doi.org/10.13039/501100002261
https://doi.org/10.13039/100000936
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Summary:6 pages, 2 figures, supporting information https://doi.org/10.1111/jpy.12748 Recently radiated dinoflagellates Apocalathium aciculiferum (collected in Lake Erken, Sweden), Apocalathium malmogiense (Baltic Sea) and Apocalathium aff. malmogiense (Highway Lake, Antarctica) represent a lineage with an unresolved phylogeny. We determined their phylogenetic relationships using phylotranscriptomics based on 792 amino acid sequences. Our results showed that A. aciculiferum diverged from the other two closely related lineages, consistent with their different morphologies in cell size, relative cell length and presence of spines. We hypothesized that A. aff. malmogiense and A. malmogiense, which inhabit different hemispheres, are evolutionarily more closely related because they diverged from a marine common ancestor, adapting to a wide salinity range, while A. aciculiferum colonized a freshwater habitat, by acquiring adaptations to this environment, in particular, salinity intolerance. We show that phylotranscriptomics can resolve the phylogeny of recently diverged protists. This has broad relevance, given that many phytoplankton species are morphologically very similar, and single genes sometimes lack the information to determine species’ relationships The work was supported through the Russian Foundation for Basic Research (project # 16-04-01704) to NA and a Swedish Research Council grant (2012-10-24) to KR as well as the marine microbial eukaryote transcriptome sequencing project (MMETSP) of the Gordon and Betty Moore Foundation Peer Reviewed

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