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Phylogenetic Relationships and Evolution in the Strelitziaceae (Zingiberales)

Evolutionary trends and phylogenetic relationships in the Strelitziaceae (Zingiberales) were investigated using sequence data from ten plastid and two nuclear regions and a morphological dataset. The status of species of Strelitzia were evaluated in terms of the phylogenetic species concept. Relatio... Full description

Journal Title: Systematic botany 2012-09, Vol.37 (3), p.606-619
Main Author: Cron, Glynis V
Other Authors: Pirone, Cary , Bartlett, Madelaine , Kress, W. John , Specht, Chelsea
Format: Electronic Article Electronic Article
Language: English
Subjects:
Quelle: Alma/SFX Local Collection
Publisher: American Society of Plant Toxonomists
ID: ISSN: 0363-6445
Zum Text:
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recordid: cdi_bioone_primary_10_1600_036364412X648562
title: Phylogenetic Relationships and Evolution in the Strelitziaceae (Zingiberales)
format: Article
creator:
  • Cron, Glynis V
  • Pirone, Cary
  • Bartlett, Madelaine
  • Kress, W. John
  • Specht, Chelsea
subjects:
  • Analysis
  • Biogeography
  • Biological diversity
  • Biological taxonomies
  • Datasets
  • DNA sequencing
  • Evolution
  • Inflorescences
  • Molecular Phylogenetics
  • Morphology
  • Nucleotide sequencing
  • Parsimony
  • Petals
  • Phylogenetics
  • Phylogeny
  • Plants
  • Plastids
  • Pollination
  • Strelitzia
ispartof: Systematic botany, 2012-09, Vol.37 (3), p.606-619
description: Evolutionary trends and phylogenetic relationships in the Strelitziaceae (Zingiberales) were investigated using sequence data from ten plastid and two nuclear regions and a morphological dataset. The status of species of Strelitzia were evaluated in terms of the phylogenetic species concept. Relationships among the genera remain equivocal with two hypotheses emerging: (i) Strelitzia sister to a clade comprising Ravenala and Phenakospermum when indels are included, or (ii) Ravenala sister to the remainder of the Strelitziaceae when indels are excluded in/from the combined molecular and ‘total evidence’ analyses. Within Strelitzia, S. nicolai is sister to the rest of the genus, with S. alba sister to S. caudata. Strelitzia reginae is shown to be paraphyletic as S. juncea is nested within it, but more sampling at the population level is needed to confirm the taxonomic status of S. juncea. The highly localized and endangered Strelitzia alba is confirmed as a distinct species, as are S. caudata and S. nicolai, despite few morphological differences. Evolutionary trends are linked to changes in habitat and coevolution with pollinators. Climate change in southern Africa is thought to have restricted Strelitzia nicolai (or its ancestor) to the eastern coastal region, with subsequent allopatric speciation of S. alba and S. caudata, and relatively recent parapatric divergence of S. juncea from S. reginae.
language: eng
source: Alma/SFX Local Collection
identifier: ISSN: 0363-6445
fulltext: fulltext
issn:
  • 0363-6445
  • 1548-2324
url: Link


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descriptionEvolutionary trends and phylogenetic relationships in the Strelitziaceae (Zingiberales) were investigated using sequence data from ten plastid and two nuclear regions and a morphological dataset. The status of species of Strelitzia were evaluated in terms of the phylogenetic species concept. Relationships among the genera remain equivocal with two hypotheses emerging: (i) Strelitzia sister to a clade comprising Ravenala and Phenakospermum when indels are included, or (ii) Ravenala sister to the remainder of the Strelitziaceae when indels are excluded in/from the combined molecular and ‘total evidence’ analyses. Within Strelitzia, S. nicolai is sister to the rest of the genus, with S. alba sister to S. caudata. Strelitzia reginae is shown to be paraphyletic as S. juncea is nested within it, but more sampling at the population level is needed to confirm the taxonomic status of S. juncea. The highly localized and endangered Strelitzia alba is confirmed as a distinct species, as are S. caudata and S. nicolai, despite few morphological differences. Evolutionary trends are linked to changes in habitat and coevolution with pollinators. Climate change in southern Africa is thought to have restricted Strelitzia nicolai (or its ancestor) to the eastern coastal region, with subsequent allopatric speciation of S. alba and S. caudata, and relatively recent parapatric divergence of S. juncea from S. reginae.
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subjectAnalysis ; Biogeography ; Biological diversity ; Biological taxonomies ; Datasets ; DNA sequencing ; Evolution ; Inflorescences ; Molecular Phylogenetics ; Morphology ; Nucleotide sequencing ; Parsimony ; Petals ; Phylogenetics ; Phylogeny ; Plants ; Plastids ; Pollination ; Strelitzia
ispartofSystematic botany, 2012-09, Vol.37 (3), p.606-619
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abstractEvolutionary trends and phylogenetic relationships in the Strelitziaceae (Zingiberales) were investigated using sequence data from ten plastid and two nuclear regions and a morphological dataset. The status of species of Strelitzia were evaluated in terms of the phylogenetic species concept. Relationships among the genera remain equivocal with two hypotheses emerging: (i) Strelitzia sister to a clade comprising Ravenala and Phenakospermum when indels are included, or (ii) Ravenala sister to the remainder of the Strelitziaceae when indels are excluded in/from the combined molecular and ‘total evidence’ analyses. Within Strelitzia, S. nicolai is sister to the rest of the genus, with S. alba sister to S. caudata. Strelitzia reginae is shown to be paraphyletic as S. juncea is nested within it, but more sampling at the population level is needed to confirm the taxonomic status of S. juncea. The highly localized and endangered Strelitzia alba is confirmed as a distinct species, as are S. caudata and S. nicolai, despite few morphological differences. Evolutionary trends are linked to changes in habitat and coevolution with pollinators. Climate change in southern Africa is thought to have restricted Strelitzia nicolai (or its ancestor) to the eastern coastal region, with subsequent allopatric speciation of S. alba and S. caudata, and relatively recent parapatric divergence of S. juncea from S. reginae.
pubAmerican Society of Plant Toxonomists
doi10.1600/036364412X648562
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