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Phylogenetic relationships of Betula species (Betulaceae) based on nuclear Adh and chloroplast matK sequences
Department of Biology, University of Joensuu, Joensuu, Finland.
Department of Conservation Biology and Genetics, Evolutionary Biology Centre, Uppsala University, Uppsala, Sweden.
Department of Biology, University of Joensuu, Joensuu, Finland. (Molecular Biochemistry)ORCID-id: 0000-0002-9233-7254
Department of Biology, University of Joensuu, Joensuu, Finland.
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2004 (engelsk)Inngår i: American Journal of Botany, ISSN 0002-9122, E-ISSN 1537-2197, Vol. 91, nr 11, s. 1834-1845Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

The phylogenetic relationships within the genus Betula (Betulaceae) were investigated using a part of the nuclear ADH gene and DNA sequences of the chloroplast matK gene with parts of its flanking regions. Two well‐supported phylogenetic groups could be identified in the chloroplast DNA sequence: one containing the three American species B. lenta, B. alleghaniensis, and B. papyrifera and the other including all the other species studied. The ADH gene displayed more variation, and three main groups could be identified. In disagreement with the classical division of the genus Betula, B. schmidtii and B. nana grouped with the species in subgenus Betula, and B. ermanii grouped with species in subgenus Chamaebetula, including B. humilis and B. fruticosa. The ADH phylogeny suggests that several independent polyploidizations within the genus Betula could have taken place. The ADH and chloroplast phylogenies were in part incongruent due to the placement of B. papyrifera. The most likely reason for this seems to be cytoplasmic introgression.

sted, utgiver, år, opplag, sider
John Wiley & Sons, 2004. Vol. 91, nr 11, s. 1834-1845
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URN: urn:nbn:se:oru:diva-72410DOI: 10.3732/ajb.91.11.1834ISI: 000225242500011Scopus ID: 2-s2.0-24044431571OAI: oai:DiVA.org:oru-72410DiVA, id: diva2:1288093
Tilgjengelig fra: 2019-02-12 Laget: 2019-02-12 Sist oppdatert: 2019-02-19bibliografisk kontrollert

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