Thomas Marcussen

Image of Thomas Marcussen
Visiting address Blindernveien 31 0371 Oslo
Postal address Postboks 1066 Blindern 0316 Oslo

I hold a PhD degree in plant systematics from UiO and have worked as postdoc/researcher at Uppsala, Gothenburg and NMBU. My research interest is primarily phylogenetics, especially relating to fossil dating and reticulate evolution. Organisms of choice have been diploid wheats and grasses in general, Viola and Violaceae, Geranium, and Salicaceae. Here at CEES I will be working on the Earth Biogenome Project during spring 2020.


  • Lindberg, Camilla Lorange; Hanslin, Hans Martin; Schubert, Marian; Marcussen, Thomas; Trevaskis, Ben; Preston, Jill Christine & Fjellheim, Siri (2020). Increased above-ground resource allocation is a likely precursor for independent evolutionary origins of annuality in the Pooideae grass subfamily. New Phytologist.  ISSN 0028-646X.  228(1), s 318- 329 . doi: 10.1111/nph.16666 Full text in Research Archive. Show summary
  • Bravo, Gustavo A.; Antonelli, Alexandre; Bacon, Christine D.; Bartoszek, Krzysztof; Blom, Mozes P.K.; Huynh, Stella; Jones, Graham; Knowles, L. Lacey; Lamichhaney, Sangeet; Marcussen, Thomas; Morlon, Hélène; Nakhleh, Luay K.; Oxelman, Bengt; Pfeil, Bernard; Schliep, Alexander; Wahlberg, Niklas; Werneck, Fernanda P.; Wiedenhoeft, John; Willows-Munro, Sandi & Edwards, Scott V. (2019). Embracing heterogeneity: Coalescing the tree of life and the future of phylogenomics. PeerJ.  ISSN 2167-8359.  2019(2), s 1- 60 . doi: 10.7717/peerj.6399 Full text in Research Archive.
  • Huynh, Stella; Marcussen, Thomas; Felber, Francois & Parisod, Christian (2019). Hybridization preceded radiation in diploid wheats. Molecular Phylogenetics and Evolution.  ISSN 1055-7903.  139, s 1- 10 . doi: 10.1016/j.ympev.2019.106554
  • Kwiatkowska, Monika; Bohdanowicz, Jerzy; Cubala, Marlena; Slomka, Aneta; Zabicka, Justyna; Zabicki, Piotr; Migdalek, Grzegorz; Marcussen, Thomas; Thiele, Kevin R. & Kuta, Elzbieta (2019). A new pollination system in non-cleistogamous species of Viola results from nyctinastic (night-closing) petal movements – A mixed outcrossing-selfing strategy. Flora: Morphologie, Geobotanik, Oekophysiologie.  ISSN 0367-2530.  253, s 1- 9 . doi: 10.1016/j.flora.2019.01.007
  • Kwiatkowska, Monika; Żabicka, Justyna; Migdałek, Grzegorz; Żabicki, Piotr; Cubala, Marlena; Bohdanowicz, Jerzy; Słomka, Aneta; Jędrzejczyk-Korycińska, Monika; Sliwinska, Elwira; Sychta, Klaudia; Marcussen, Thomas; Thiele, Kevin & Kuta, Elżbieta (2019). Comprehensive characteristics and genetic diversity of the endemic Australian Viola banksii (section Erpetion, Violaceae). Australian Journal of Botany.  ISSN 0067-1924.  67(2), s 81- 98 . doi: 10.1071/BT18233
  • Schubert, Marian; Marcussen, Thomas; Meseguer, Andrea S. & Fjellheim, Siri (2019). The grass subfamily Pooideae: Cretaceous–Palaeocene origin and climate‐driven Cenozoic diversification. Global Ecology and Biogeography.  ISSN 1466-822X.  28(8), s 1168- 1182 . doi: 10.1111/geb.12923
  • Blaxland, Kim; Ballard, Harvey E. & Marcussen, Thomas (2018). Viola pluviae sp. nov. (Violaceae), a member of subsect. Stolonosae in the Pacific Northwest region of North America. Nordic Journal of Botany (NJB).  ISSN 0107-055X.  36(9), s 1- 9 . doi: 10.1111/njb.01931
  • Migdalek, Grzegorz; Nowak, J; Saluga, M; Cieslak, E; Szczepaniak, M; Ronikier, M; Marcussen, Thomas; Slomka, Aneta & Kuta, Elzbieta (2017). No evidence of contemporary interploidy gene flow between the closely related European woodland violets Viola reichenbachiana and V. riviniana (sect. Viola, Violaceae). Plant Biology.  ISSN 1435-8603.  19(4), s 542- 551 . doi: 10.1111/plb.12571
  • Oxelman, Bengt; Brysting, Anne Krag; Jones, Graham R; Marcussen, Thomas; Oberprieler, Christoph & Pfeil, Bernard E. (2017). Phylogenetics of Allopolyploids. Annual Review of Ecology, Evolution and Systematics.  ISSN 1543-592X.  48, s 543- 557 . doi: 10.1146/annurev-ecolsys-110316-022729 Full text in Research Archive.
  • Park, Sungkyu; Yoo, Ki-Oug; Marcussen, Thomas; Backlund, Anders; Jacobsson, Erik; Rosengren, K Johan; Doo, Inseok & Göransson, Ulf (2017). Cyclotide evolution: Insights from the analyses of their precursor sequences, structures and distribution in violets (Viola). Frontiers in Plant Science.  ISSN 1664-462X.  8 . doi: 10.3389/fpls.2017.02058
  • Knoche, Gerd & Marcussen, Thomas (2016). Viola barhalensis (Violaceae), a new species from northeastern Turkey. Phytotaxa.  ISSN 1179-3155.  275(1), s 14- 22 . doi: 10.11646/phytotaxa.275.1.2
  • Malobecki, Andrzej; Marcussen, Thomas; Bohdanowicz, Jerzy; Migdalek, Grzegorz; Slomka, Aneta & Kuta, Elzbieta (2016). Cleistogamy and phylogenetic position of Viola uliginosa (Violaceae) re-examined. Botanical journal of the Linnean Society.  ISSN 0024-4074.  182(1), s 180- 194 . doi: 10.1111/boj.12460
  • McKeown, Meghan; Schubert, Marian; Marcussen, Thomas; Fjellheim, Siri & Preston, Jill C (2016). Evidence for an early origin of vernalization responsiveness in temperate pooideae grasses. Plant Physiology.  ISSN 0032-0889.  172(1), s 416- 426 . doi: 10.1104/pp.16.01023
  • Toprak, Zeynep; Pfeil, Bernard E; Jones, Graham; Marcussen, Thomas; Ertekin, Alaattin Selcuk & Oxelman, Bengt (2016). Species delimitation without prior knowledge: DISSECT reveals extensive cryptic speciation in the Silene aegyptiaca complex (Caryophyllaceae). Molecular Phylogenetics and Evolution.  ISSN 1055-7903.  102, s 1- 8 . doi: 10.1016/j.ympev.2016.05.024
  • Bertrand, Yann J.K.; Scheen, Anne-Cathrine; Marcussen, Thomas; Pfeil, Bernard E.; de Sousa, Filipe & Oxelman, Bengt (2015). Assignment of homoeologs to parental genomes in allopolyploids for species tree inference, with an example from fumaria (papaveraceae). Systematic Biology.  ISSN 1063-5157.  64(3), s 448- 471 . doi: 10.1093/sysbio/syv004
  • Marcussen, Thomas; Heier, Lise; Brysting, Anne Krag; Oxelman, Bengt & Jakobsen, Kjetill Sigurd (2015). From gene trees to a dated allopolyploid network: insights from the angiosperm genus Viola (Violaceae). Systematic Biology.  ISSN 1063-5157.  64(1), s 84- 101 . doi: 10.1093/sysbio/syu071
  • Mohammadi Shahrestani, Maryam; Marcussen, Thomas; Saeidi Mehrvarz, Shahryar & Yousefi, Narjes (2015). Morphological and phylogenetic relationships within Viola sect. Sclerosium (Violaceae) in Iran. Flora: Morphologie, Geobotanik, Oekophysiologie.  ISSN 0367-2530.  215, s 67- 74 . doi: 10.1016/j.flora.2015.07.008
  • Sandve, Simen Rød; Marcussen, Thomas; Mayer, Klaus F X; Jakobsen, Kjetill Sigurd; Heier, Lise; Steuernagel, Burkhard; Wulff, Brande B.H. & Olsen, Odd-Arne (2015). Chloroplast phylogeny of Triticum/Aegilops species is not incongruent with an ancient homoploid hybrid origin of the ancestor of the bread wheat D-genome. New Phytologist.  ISSN 0028-646X.  208(1), s 9- 10 . doi: 10.1111/nph.13487
  • Marcussen, Thomas; Sandve, Simen Rød; Heier, Lise; Spannagl, Manuel; Pfeifer, Matthias; The International Wheat Genom, IWGSC; Jakobsen, Kjetill Sigurd; Wulff, Brande B.H.; Steuernagel, Burkhard; Mayer, Klaus & Olsen, Odd-Arne (2014). Ancient hybridizations among the ancestral genomes of bread wheat. Science.  ISSN 0036-8075.  345(6194) . doi: 10.1126/science.1250092
  • Elven, Reidar; Fremstad, Eli & Marcussen, Thomas (2013). Viola epipsila Ledeb, In Reidar Elven; Eli Fremstad & Oddvar Pedersen (ed.),  Distribution maps of Norwegian vascular plants. IV The eastern and northeastern elements.  Akademika forlag.  ISBN 978-82-321-0246-4.  Selvstendig kapittel.  s 447 - 450
  • Nordal, Inger; Marcussen, Thomas & Elven, Reidar (2013). Viola rupestris F.W.Schmidt, In Reidar Elven; Eli Fremstad & Oddvar Pedersen (ed.),  Distribution maps of Norwegian vascular plants. IV The eastern and northeastern elements.  Akademika forlag.  ISBN 978-82-321-0246-4.  kapittel.  s 453 - 455
  • Marcussen, Thomas; Jakobsen, Kjetill Sigurd; Danihelka, Jiří; Ballard, Harvey E.; Blaxland, Kim; Brysting, Anne Krag & Oxelman, Bengt (2012). Inferring Species Networks from Gene Trees in High-Polyploid North American and Hawaiian Violets (Viola, Violaceae). Systematic Biology.  ISSN 1063-5157.  61(1), s 107- 126 . doi: 10.1093/sysbio/syr096
  • Brysting, Anne Krag; Mathiesen, Cecilie & Marcussen, Thomas (2011). Challenges in polyploid phylogenetic reconstruction: A case story from the arctic-alpine Cerastium alpinum complex. Taxon.  ISSN 0040-0262.  60(2), s 333- 347 . doi: 10.1002/tax.602004
  • Marcussen, Thomas & Borgen, Liv (2011). Species delimitation in the Ponto-Caucasian Viola sieheana complex, based on evidence from allozymes, morphology, ploidy levels, and crossing experiments. Plant Systematics and Evolution.  ISSN 0378-2697.  291(3-4), s 183- 196 . doi: 10.1007/s00606-010-0377-z
  • Marcussen, Thomas; Oxelman, Bengt; Skog, Anna & Jakobsen, Kjetill Sigurd (2010). Evolution of plant RNA polymerase IV/V genes: evidence of subneofunctionalization of duplicated NRPD2/NRPE2-like paralogs in Viola (Violaceae). BMC Evolutionary Biology.  ISSN 1471-2148.  10(45) . doi: 10.1186/1471-2148-10-45
  • Malecot, V; Marcussen, Thomas; Munzinger, J; Yockteng, R & Henry, M (2007). On the origin of the sweet-smelling Parma violet cultivars (Violaceae): Wide intraspecific hybridization, sterility, and sexual reproduction. American Journal of Botany.  ISSN 0002-9122.  94(1), s 29- 41
  • Marcussen, Thomas (2007). Lifiol er død - leve engfiol! en kritisk morfologisk gjennomgang av komplekset i Norge. Blyttia : Norsk botanisk forenings tidsskrift.  ISSN 0006-5269.  65(3), s 195- 207
  • Marcussen, Thomas (2006). Allozymic variation in the widespread and cultivated Viola odorata (Violaceae) in western Eurasia. Botanical journal of the Linnean Society.  ISSN 0024-4074.  151, s 563- 571
  • Marcussen, Thomas; Borgen, Liv & Nordal, Inger (2005). New distributional and molecular information call into question the systematic position of the West Asian Viola sintenisii (Violaceae). Botanical journal of the Linnean Society.  ISSN 0024-4074.  147, s 91- 98
  • Nordal, Inger; Jonsell, Bengt & Marcussen, Thomas (2005). Viola rupestris: molecular analyses to elucidate postglacial migration in Western Europe. Journal of Biogeography.  ISSN 0305-0270.  32, s 1453- 1459
  • Nordal, Inger & Marcussen, Thomas (2005). Kalkfiol Viola rupestris ssp. relicta er bisentrisk i Skandinavia - ny forekomst på Møre. Blyttia : Norsk botanisk forenings tidsskrift.  ISSN 0006-5269.  63(2), s 67- 71
  • Marcussen, Thomas; Borgen, Liv & Nordal, Inger (2001). Viola hirta (Violaceae) and its relatives in Norway. Nordic Journal of Botany (NJB).  ISSN 0107-055X.  21(1), s 5- 17 Show summary
  • Marcussen, Thomas & Borgen, Liv (2000). Allozymic variation and relationships within Viola subsection Viola (Violaceae). Plant Systematics and Evolution.  ISSN 0378-2697.  223, s 29- 57 Show summary
  • Marcussen, Thomas & Nordal, Inger (1998). Viola suavis - a new species in the Nordic flora - with comparisons with other species in the subsection Viola.. Nordic Journal of Botany (NJB).  ISSN 0107-055X.  18, s 221- 237
  • Marcussen, Thomas & Nordal, Inger (1998). Viola suavis, a new species in the Nordic flora, with analyses of the relation to other species in the subsection Viola (Violaceae). Nordic Journal of Botany (NJB).  ISSN 0107-055X.  18(2), s 221- 237 Show summary

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  • Schubert, Marian; Grønvold, Lars; Marcussen, Thomas; Meseguer, Andrea; Sandve, Simen Rød; Hvidsten, Torgeir Rhoden & Fjellheim, Siri (2019). Evolution of tolerance to temperate climates in the grass subfamily Pooideae.
  • Fjellheim, Siri; Marcussen, Thomas; Schubert, Marian & Meseguer, Andrea (2018). Evolution of adaptations to temperate climate in the grass subfamily Pooideae.
  • Vivian-Smith, Adam; Sønstebø, Jørn Henrik; Marcussen, Thomas; Uleberg, Eivind; Graham, Julie; Sønsteby, Anita & Martinussen, Inger (2015). Genomic Survey Sequences and the Structure of the Rubus chamaemorus L. and Rubus arcticus L. Genomes As Determined By Double Digest Restriction Associated Digest-(ddRAD) Tags.
  • Marcussen, Thomas; Nordal, Inger & Jonsell, Bengt (2001). Phylogeography in the Viola rupestris and V. riviniana complexes ¿ a preliminary study. Show summary
  • Marcussen, Thomas (2000). Phylogeography in Viola elucidated by allozymes. Show summary
  • Henriksen, Olaf; Corey, Linda A.; Pellock, John M.; Berg, Kåre; Solaas, Marit Hornberg; Refsland, Grethe B. & Marcussen, Thomas (1999). The roleof genetics in epilepsy is demonstrated through studies of Norwegian and Virginian twins.
  • Marcussen, Thomas & Borgen, Liv (1999). Variation and relationships within Viola, subsect. Viola.
  • Nordal, Inger; Marcussen, Thomas & Berg, Tore (1999). Fagerfiol Viola suavis - ny, men likevel gammel i norsk flora!. Blyttia : Norsk botanisk forenings tidsskrift.  ISSN 0006-5269.  57(3), s 109- 116 Show summary
  • Marcussen, Thomas (1998). Viola L. subsection Viola: Variation, hybridization, and relationships among taxa. Show summary

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Published Apr. 22, 2020 11:51 AM - Last modified Apr. 22, 2020 11:51 AM