Carex, subgenus Carex (Cyperaceae) — A phylogenetic approach using ITS sequences

To evaluate the sectional classification in Carex, subgenus Carex, the ITS region of 117 species belonging to 32 sections was analyzed with Neighbor Joining (NJ) and Markov chain Monte Carlo (MCMC) methods. In our analyses (1) species of subgenus Indocarex appear as a statistically well supported gr...

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Bibliographic Details
Published in:Plant systematics and evolution 2004-04, Vol.246 (1/2), p.89-107
Main Authors: Hendrichs, M., Oberwinkler, F., Begerow, D., Bauer, R.
Format: Article
Language:English
Subjects:
Biological taxonomies
Carex
Chromosomes
Clusters
Herbs
Internal transcribed spacers
Markov analysis
Markov chains
Monte Carlo simulation
Phylogenetics
Phylogeny
Plants
Ploidies
Species
Taxa
Waterways
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Summary:To evaluate the sectional classification in Carex, subgenus Carex, the ITS region of 117 species belonging to 32 sections was analyzed with Neighbor Joining (NJ) and Markov chain Monte Carlo (MCMC) methods. In our analyses (1) species of subgenus Indocarex appear as a statistically well supported group within subgenus Carex. (2) The representatives of sections Vesicariae, Hirtae, Pseudocypereae, Ceratocystis, Spirostachyae, Bicolores, Paniceae, Trachychlaenae, Scirpinae, Atratae and Albae group in statistically supported clades with higher support in MCMC than in NJ. (3) C. rariflora clusters with representatives of section Limosae, however only weakly supported. (4) Taxa of section Phacocystis are divided in two statistically supported subclusters that are closely related to a core group of section Hymenochlaenae. (5) Species of sections Montanae, Pachystylae, Digitatae, Phacocystis, Rhomboidales, Careyanae and Frigidae are segregated into two or more clusters each. (6) Five species of section Frigidae cluster together, whereas the seven others are in scattered positions. Based on these results, delimitation of sections is discussed.
ISSN:0378-2697
1615-6110
2199-6881
DOI:10.1007/s00606-004-0128-0