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Delineating closely related dinoflagellate lineages using phylotranscriptomics

AutorAnnenkova, Nataliia V.; Ahrén, Dag; Logares, Ramiro ; Kremp, Anke; Rengefors, Karin
Palabras claveInternal transcribed spacer-2
ITS2
Cytochrome b
COB
Bootstrap support
BS
Protists
Adaptive radiation
Transcriptome
Phylogenomics
Microalgae
High Throughput Sequencing
Fecha de publicaciónago-2018
EditorPhycological Society of America
CitaciónJournal of Phycology 54(4): 571-576 (2018)
ResumenRecently 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
Descripción6 pages, 2 figures, supporting information https://doi.org/10.1111/jpy.12748
Versión del editorhttps://doi.org/10.1111/jpy.12748
URIhttp://hdl.handle.net/10261/169795
Identificadoresdoi: 10.1111/jpy.12748
issn: 0022-3646
e-issn: 1529-8817
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