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Systematics and phylogeography of the Dactylorhiza maculata complex (Orchidaceae) in Scandinavia: insights from cytological, morphological and molecular data

Plant systematics and evolution, 2008-06, Vol.273 (1-2), p.107-132 [Peer Reviewed Journal]

Springer-Verlag 2008 ;Plant Systematics and Evolution is a copyright of Springer, (2008). All Rights Reserved. ;ISSN: 0378-2697 ;ISSN: 1615-6110 ;EISSN: 1615-6110 ;DOI: 10.1007/s00606-008-0035-x

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Title:
Systematics and phylogeography of the Dactylorhiza maculata complex (Orchidaceae) in Scandinavia: insights from cytological, morphological and molecular data
Author: Ståhlberg, David ; Hedrén, Mikael
Subjects: Alleles ; Autotetraploid ; Biologi ; Biological Sciences ; Biomedical and Life Sciences ; Dactylorhiza ; Dactylorhiza maculata ; Deoxyribonucleic acid ; Diploidy ; DNA ; Ecology ; Ekologi ; Flow cytometry ; Gene flow ; Geography ; Haplotypes ; Hybridization ; Immigration ; Introgression ; ITS ; Life Sciences ; Loci ; Morphology ; Morphometry ; Natural Sciences ; Naturvetenskap ; Original Article ; Plant Anatomy/Development ; Plant Ecology ; Plant Sciences ; Plant Systematics/Taxonomy/Biogeography ; Plants ; Plastid DNA ; Plastids ; Polyploidy ; Population mean ; Populations ; Recombination ; Ribosomal DNA ; Systematics ; Taxa ; Taxonomy ; Tetraploidy
Is Part Of: Plant systematics and evolution, 2008-06, Vol.273 (1-2), p.107-132
Description: Flow cytometry, morphometry and molecular markers [plastid DNA and internal transcribed spacers (ITS) of nuclear ribosomal DNA] were used to determine taxonomic and phylogeographic patterns in Dactylorhiza maculata s.l. from Scandinavia. A total of 238 individuals from 27 populations from throughout all of Scandinavia, including the adjacent Kola Peninsula of Russia, were analyzed. Diploid D. maculata ssp. fuchsii and autotetraploid D. maculata ssp. maculata are morphologically differentiated. Fragment size variants from 10 plastid DNA loci (seven microsatellite loci and three loci with indel variation) were combined to give 43 haplotypes. Three major groups of haplotypes were found. Group I haplotypes were prevalent in the north and the northeast, whereas Group II haplotypes were prevalent in the south and the southwest. Group III was represented by only a single haplotype and appeared to be the result of introgression from D. incarnata s.l. Group I and Group II haplotypes did not correspond with cytologically and morphologically defined D. maculata ssp. fuchsii or D. maculata ssp. maculata. Past introgressive gene flow rather than recent hybridization is envisaged. Intermediate Group I haplotypes between Group II and the rest of Group I were detected in a zone of contact in central Sweden, which may suggest plastid DNA recombination. The six ITS alleles scored showed strong positive correlation with taxonomy. All data sets obtained for ssp. maculata were significantly correlated with geography. Three different autotetraploid lineages are hypothesized. One lineage may represent postglacial immigration from the south and the other two lineages may represent eastern immigration routes. Morphology and ITS data suggested that subarctic populations of ssp. maculata should be recognized as var. kolaënsis.
Publisher: Vienna: Vienna : Springer Vienna
Language: English
Identifier: ISSN: 0378-2697
ISSN: 1615-6110
EISSN: 1615-6110
DOI: 10.1007/s00606-008-0035-x
Source: Alma/SFX Local Collection
SWEPUB Freely available online
ProQuest Central

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Systematics and phylogeography of the Dactylorhiza maculata complex (Orchidaceae) in Scandinavia: insights from cytological, morphological and molecular data

Springer-Verlag 2008 ;Plant Systematics and Evolution is a copyright of Springer, (2008). All Rights Reserved. ;ISSN: 0378-2697 ;ISSN: 1615-6110 ;EISSN: 1615-6110 ;DOI: 10.1007/s00606-008-0035-x

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