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Patterns of polyploid evolution in Greek marsh orchids (Dactylorhiza; Orchidaceae) as revealed by allozymes, AFLPs, and plastid DNA data

Hedrén, Mikael LU ; Olofsson, Sofie LU ; Persson Hovmalm, Helena A; Aerenlund Pedersen, Henrik and Hansson, Sven (2007) In American Journal of Botany 94(7). p.1205-1218
Abstract
Polyploidy is common in higher plants, and speciation in polyploid complexes is usually the result of reticulate evolution. We examined variation in nuclear AFLP fingerprints, nuclear isozymes, and hypervariable plastid DNA loci to describe speciation patterns and species relationships in the Dactylorhiza incarnatalmaculata polyploid complex (marsh orchids; Orchidaceae) in Greece. Several endemic taxa with restricted distribution have been described from this area, and to propose meaningful conservation priorities, detailed relationships need to be known. We identified four independently derived allopolyploid lineages, which is a pattern poorly correlated with prevailing taxonomy. Three lineages were composed of populations restricted to... (More)
Polyploidy is common in higher plants, and speciation in polyploid complexes is usually the result of reticulate evolution. We examined variation in nuclear AFLP fingerprints, nuclear isozymes, and hypervariable plastid DNA loci to describe speciation patterns and species relationships in the Dactylorhiza incarnatalmaculata polyploid complex (marsh orchids; Orchidaceae) in Greece. Several endemic taxa with restricted distribution have been described from this area, and to propose meaningful conservation priorities, detailed relationships need to be known. We identified four independently derived allopolyploid lineages, which is a pattern poorly correlated with prevailing taxonomy. Three lineages were composed of populations restricted to small areas and may be of recent origins from extant parental lineages. One lineage with wide distribution in northern Greece was characterized by several unique plastid haplotypes that were phylogenetically related and evidently older. The D. incarnatal maculata polyploid complex in Greece has high levels of genetic diversity at the polyploid level. This diversity has accumulated over a long time and may include genetic variants originating from now extinct parental populations. Our data also indicate that the Balkans may have constituted an important refuge from which northern European Dactylorhiza were recruited after the Weichselian ice age. (Less)
Please use this url to cite or link to this publication:
author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Dactylorhiza, Greece, Orchidaceae, plastid DNA, systematics, polyploid evolution, AFLP, allozymes
in
American Journal of Botany
volume
94
issue
7
pages
1205 - 1218
publisher
Botanical Society of America
external identifiers
  • wos:000249830800013
  • scopus:34447316149
ISSN
0002-9122
language
English
LU publication?
yes
id
4c4b101b-6e50-45e1-819d-b9ae2aacf8d5 (old id 656299)
alternative location
http://www.amjbot.org/cgi/content/abstract/94/7/1205
date added to LUP
2007-12-12 12:42:35
date last changed
2017-01-01 06:59:14
@article{4c4b101b-6e50-45e1-819d-b9ae2aacf8d5,
  abstract     = {Polyploidy is common in higher plants, and speciation in polyploid complexes is usually the result of reticulate evolution. We examined variation in nuclear AFLP fingerprints, nuclear isozymes, and hypervariable plastid DNA loci to describe speciation patterns and species relationships in the Dactylorhiza incarnatalmaculata polyploid complex (marsh orchids; Orchidaceae) in Greece. Several endemic taxa with restricted distribution have been described from this area, and to propose meaningful conservation priorities, detailed relationships need to be known. We identified four independently derived allopolyploid lineages, which is a pattern poorly correlated with prevailing taxonomy. Three lineages were composed of populations restricted to small areas and may be of recent origins from extant parental lineages. One lineage with wide distribution in northern Greece was characterized by several unique plastid haplotypes that were phylogenetically related and evidently older. The D. incarnatal maculata polyploid complex in Greece has high levels of genetic diversity at the polyploid level. This diversity has accumulated over a long time and may include genetic variants originating from now extinct parental populations. Our data also indicate that the Balkans may have constituted an important refuge from which northern European Dactylorhiza were recruited after the Weichselian ice age.},
  author       = {Hedrén, Mikael and Olofsson, Sofie and Persson Hovmalm, Helena A and Aerenlund Pedersen, Henrik and Hansson, Sven},
  issn         = {0002-9122},
  keyword      = {Dactylorhiza,Greece,Orchidaceae,plastid DNA,systematics,polyploid evolution,AFLP,allozymes},
  language     = {eng},
  number       = {7},
  pages        = {1205--1218},
  publisher    = {Botanical Society of America},
  series       = {American Journal of Botany},
  title        = {Patterns of polyploid evolution in Greek marsh orchids (Dactylorhiza; Orchidaceae) as revealed by allozymes, AFLPs, and plastid DNA data},
  volume       = {94},
  year         = {2007},
}