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Systematics and Taxonomy of Carex sect. Ceratocystis (Cyperaceae) in Europe: A Molecular and Cytogenetic Approach

Carex sect. Ceratocystis is distributed in Eurasia and North America, with a few disjunct taxa in the Southern Hemisphere. Despite being one of the most intensively studied groups within Carex, its taxonomy remains a complex issue due to hybridization and faint morphological boundaries. Two main con... Full description

Journal Title: Systematic botany 2012, Vol.37 (2), p.382-398
Main Author: Jiménez-Mejías, Pedro
Other Authors: Martín-Bravo, Santiago , Luceño, Modesto
Format: Electronic Article Electronic Article
Language: English
Subjects:
Quelle: Alma/SFX Local Collection
Publisher: American Society of Plant Toxonomists
ID: ISSN: 0363-6445
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title: Systematics and Taxonomy of Carex sect. Ceratocystis (Cyperaceae) in Europe: A Molecular and Cytogenetic Approach
format: Article
creator:
  • Jiménez-Mejías, Pedro
  • Martín-Bravo, Santiago
  • Luceño, Modesto
subjects:
  • 5′trnK
  • Aneuploid Series
  • Basins
  • Biological taxonomies
  • Botany
  • Boundaries
  • Carex
  • Carex Flava
  • Ceratocystis
  • Chromosome number
  • Cyperaceae
  • Cytogenetics
  • Data processing
  • Evolution
  • Genetic aspects
  • Haplotypes
  • Identification and classification
  • ITS polymorphisms
  • Molecular genetics
  • Mountains
  • Nomenclature
  • Phylogenetics
  • Phylogeny
  • Physiological aspects
  • Plant genetics
  • Plants
  • Plastids
  • Ribotyping
  • Rps16
  • Taxa
  • Taxonomy
  • utricle
ispartof: Systematic botany, 2012, Vol.37 (2), p.382-398
description: Carex sect. Ceratocystis is distributed in Eurasia and North America, with a few disjunct taxa in the Southern Hemisphere. Despite being one of the most intensively studied groups within Carex, its taxonomy remains a complex issue due to hybridization and faint morphological boundaries. Two main contrasting approaches to its taxonomy may be distinguished, synthetic and analytical, widely differing in the number of considered taxa. The status of several morphotypes from Europe and the Mediterranean Basin are particularly problematic. We used phylogenetic analyses of nuclear ITS and plastid rps16 and 5′trnK sequences along with cytogenetic data to evaluate the main taxonomic approaches and to infer evolutionary patterns in Europe and North Africa, with a special focus on the problematic morphotypes. Three major clades were found which mostly match morphological features of the utricle. Carex durieui should be excluded from section Ceratocystis. Although a linear agmatoploid series has been generally proposed to account for the cytogenetic evolution of section Ceratocystis, our results suggest chromosome number increase but not in a linear fashion. Different extensive hybridization areas in South Europe are suggested for some of the problematic morphotypes (Pyrenean-Cantabrian Mountains, Atlantic-Iberian Strip and Corsica).
language: eng
source: Alma/SFX Local Collection
identifier: ISSN: 0363-6445
fulltext: fulltext
issn:
  • 0363-6445
  • 1548-2324
url: Link


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descriptionCarex sect. Ceratocystis is distributed in Eurasia and North America, with a few disjunct taxa in the Southern Hemisphere. Despite being one of the most intensively studied groups within Carex, its taxonomy remains a complex issue due to hybridization and faint morphological boundaries. Two main contrasting approaches to its taxonomy may be distinguished, synthetic and analytical, widely differing in the number of considered taxa. The status of several morphotypes from Europe and the Mediterranean Basin are particularly problematic. We used phylogenetic analyses of nuclear ITS and plastid rps16 and 5′trnK sequences along with cytogenetic data to evaluate the main taxonomic approaches and to infer evolutionary patterns in Europe and North Africa, with a special focus on the problematic morphotypes. Three major clades were found which mostly match morphological features of the utricle. Carex durieui should be excluded from section Ceratocystis. Although a linear agmatoploid series has been generally proposed to account for the cytogenetic evolution of section Ceratocystis, our results suggest chromosome number increase but not in a linear fashion. Different extensive hybridization areas in South Europe are suggested for some of the problematic morphotypes (Pyrenean-Cantabrian Mountains, Atlantic-Iberian Strip and Corsica).
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subject5′trnK ; Aneuploid Series ; Basins ; Biological taxonomies ; Botany ; Boundaries ; Carex ; Carex Flava ; Ceratocystis ; Chromosome number ; Cyperaceae ; Cytogenetics ; Data processing ; Evolution ; Genetic aspects ; Haplotypes ; Identification and classification ; ITS polymorphisms ; Molecular genetics ; Mountains ; Nomenclature ; Phylogenetics ; Phylogeny ; Physiological aspects ; Plant genetics ; Plants ; Plastids ; Ribotyping ; Rps16 ; Taxa ; Taxonomy ; utricle
ispartofSystematic botany, 2012, Vol.37 (2), p.382-398
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descriptionCarex sect. Ceratocystis is distributed in Eurasia and North America, with a few disjunct taxa in the Southern Hemisphere. Despite being one of the most intensively studied groups within Carex, its taxonomy remains a complex issue due to hybridization and faint morphological boundaries. Two main contrasting approaches to its taxonomy may be distinguished, synthetic and analytical, widely differing in the number of considered taxa. The status of several morphotypes from Europe and the Mediterranean Basin are particularly problematic. We used phylogenetic analyses of nuclear ITS and plastid rps16 and 5′trnK sequences along with cytogenetic data to evaluate the main taxonomic approaches and to infer evolutionary patterns in Europe and North Africa, with a special focus on the problematic morphotypes. Three major clades were found which mostly match morphological features of the utricle. Carex durieui should be excluded from section Ceratocystis. Although a linear agmatoploid series has been generally proposed to account for the cytogenetic evolution of section Ceratocystis, our results suggest chromosome number increase but not in a linear fashion. Different extensive hybridization areas in South Europe are suggested for some of the problematic morphotypes (Pyrenean-Cantabrian Mountains, Atlantic-Iberian Strip and Corsica).
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05′trnK
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5Boundaries
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11Cytogenetics
12Data processing
13Evolution
14Genetic aspects
15Haplotypes
16Identification and classification
17ITS polymorphisms
18Molecular genetics
19Mountains
20Nomenclature
21Phylogenetics
22Phylogeny
23Physiological aspects
24Plant genetics
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abstractCarex sect. Ceratocystis is distributed in Eurasia and North America, with a few disjunct taxa in the Southern Hemisphere. Despite being one of the most intensively studied groups within Carex, its taxonomy remains a complex issue due to hybridization and faint morphological boundaries. Two main contrasting approaches to its taxonomy may be distinguished, synthetic and analytical, widely differing in the number of considered taxa. The status of several morphotypes from Europe and the Mediterranean Basin are particularly problematic. We used phylogenetic analyses of nuclear ITS and plastid rps16 and 5′trnK sequences along with cytogenetic data to evaluate the main taxonomic approaches and to infer evolutionary patterns in Europe and North Africa, with a special focus on the problematic morphotypes. Three major clades were found which mostly match morphological features of the utricle. Carex durieui should be excluded from section Ceratocystis. Although a linear agmatoploid series has been generally proposed to account for the cytogenetic evolution of section Ceratocystis, our results suggest chromosome number increase but not in a linear fashion. Different extensive hybridization areas in South Europe are suggested for some of the problematic morphotypes (Pyrenean-Cantabrian Mountains, Atlantic-Iberian Strip and Corsica).
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doi10.1600/036364412X635449
tpages17