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Evolutionary history of the Dactylorhiza maculata polyploid complex (Orchidaceae)

Ståhlberg, David LU and Hedrén, Mikael LU (2010) In Biological Journal of the Linnean Society 101(3). p.503-525
Abstract
Taxonomic complexity may be associated with migration history and polyploidy. We used plastid and nuclear DNA markers to investigate the evolutionary history of the systematically challenging Dactylorhiza maculata polyploid complex. A total of 1833 individuals from 298 populations from throughout Europe were analysed. We found that gene flow was limited between the two major taxa, diploid ssp. fuchsii (including ssp. saccifera) and tetraploid ssp. maculata. A minimum of three autotetraploid lineages were discerned: (1) southern/western ssp. maculata;

(2) northern/eastern ssp. maculata; and (3) Central European ssp. fuchsii. The two ssp. maculata lineages, which probably pre-date the last glaciation, form a contact zone with high... (More)
Taxonomic complexity may be associated with migration history and polyploidy. We used plastid and nuclear DNA markers to investigate the evolutionary history of the systematically challenging Dactylorhiza maculata polyploid complex. A total of 1833 individuals from 298 populations from throughout Europe were analysed. We found that gene flow was limited between the two major taxa, diploid ssp. fuchsii (including ssp. saccifera) and tetraploid ssp. maculata. A minimum of three autotetraploid lineages were discerned: (1) southern/western ssp. maculata;

(2) northern/eastern ssp. maculata; and (3) Central European ssp. fuchsii. The two ssp. maculata lineages, which probably pre-date the last glaciation, form a contact zone with high genetic diversity in central Scandinavia. Intermediate plastid haplotypes in the contact zone hint at recombination. Central Europe may have been a source area for the postglacial migration for the southern/western lineage of ssp. maculata, as well as for ssp. fuchsii. The northern/eastern lineage of ssp. maculata may have survived the LGM in central Russia west of the Urals. The tetraploid lineage of ssp. fuchsii is indistinguishable from diploid ssp. fuchsii, and is probably of postglacial origin. The Mediterranean region and the Caucasus have not contributed to the northward migration of either ssp. fuchsii or ssp. maculata. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
polyploid evolution, plastid DNA, phylogeography, ITS, hybrid zone, genetic variation, glacial refugia, recombination, systematics
in
Biological Journal of the Linnean Society
volume
101
issue
3
pages
503 - 525
publisher
Linnean Society of London
external identifiers
  • wos:000283081700001
  • scopus:77958584756
ISSN
0024-4066
DOI
10.1111/j.1095-8312.2010.01505.x
language
English
LU publication?
yes
id
0be0643d-f251-4e0c-b247-f5f127ae3ca1 (old id 1699197)
date added to LUP
2010-10-28 16:13:10
date last changed
2018-05-29 10:09:39
@article{0be0643d-f251-4e0c-b247-f5f127ae3ca1,
  abstract     = {Taxonomic complexity may be associated with migration history and polyploidy. We used plastid and nuclear DNA markers to investigate the evolutionary history of the systematically challenging Dactylorhiza maculata polyploid complex. A total of 1833 individuals from 298 populations from throughout Europe were analysed. We found that gene flow was limited between the two major taxa, diploid ssp. fuchsii (including ssp. saccifera) and tetraploid ssp. maculata. A minimum of three autotetraploid lineages were discerned: (1) southern/western ssp. maculata;<br/><br>
(2) northern/eastern ssp. maculata; and (3) Central European ssp. fuchsii. The two ssp. maculata lineages, which probably pre-date the last glaciation, form a contact zone with high genetic diversity in central Scandinavia. Intermediate plastid haplotypes in the contact zone hint at recombination. Central Europe may have been a source area for the postglacial migration for the southern/western lineage of ssp. maculata, as well as for ssp. fuchsii. The northern/eastern lineage of ssp. maculata may have survived the LGM in central Russia west of the Urals. The tetraploid lineage of ssp. fuchsii is indistinguishable from diploid ssp. fuchsii, and is probably of postglacial origin. The Mediterranean region and the Caucasus have not contributed to the northward migration of either ssp. fuchsii or ssp. maculata.},
  author       = {Ståhlberg, David and Hedrén, Mikael},
  issn         = {0024-4066},
  keyword      = {polyploid evolution,plastid DNA,phylogeography,ITS,hybrid zone,genetic variation,glacial refugia,recombination,systematics},
  language     = {eng},
  number       = {3},
  pages        = {503--525},
  publisher    = {Linnean Society of London},
  series       = {Biological Journal of the Linnean Society},
  title        = {Evolutionary history of the Dactylorhiza maculata polyploid complex (Orchidaceae)},
  url          = {http://dx.doi.org/10.1111/j.1095-8312.2010.01505.x},
  volume       = {101},
  year         = {2010},
}