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Molecular Phylogenetics, Molecular Evolution, and Patterns of Clade Support in Lithospertnum (Boraginaceae) and Related Taxa

Utilizing 10 cpDNA regions and thorough taxon sampling, a phylogeny is reconstructed for Lithospertnum and related members of both Lithospermeae, the tribe to which it is assigned, and Boraginaceae. Lithospermum is supported as monophyletic, and the genus is hypothesized to have originated in the Ol... Full description

Journal Title: Systematic botany 2012-04-01, Vol.37 (2), p.490-506
Main Author: James Isaac Cohen
Other Authors: Jerrold I Davis
Format: Electronic Article Electronic Article
Language: English
Subjects:
DNA
Quelle: Alma/SFX Local Collection
Publisher: American Society of Plant Taxonomists
ID: ISSN: 0363-6445
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recordid: cdi_jstor_primary_41515139
title: Molecular Phylogenetics, Molecular Evolution, and Patterns of Clade Support in Lithospertnum (Boraginaceae) and Related Taxa
format: Article
creator:
  • James Isaac Cohen
  • Jerrold I Davis
subjects:
  • Biological taxonomies
  • DNA
  • Evolution
  • Genera
  • Molecular phylogenetics
  • Phylogenetics
  • Phylogeny
  • Plants
  • Taxa
  • We they distinction
ispartof: Systematic botany, 2012-04-01, Vol.37 (2), p.490-506
description: Utilizing 10 cpDNA regions and thorough taxon sampling, a phylogeny is reconstructed for Lithospertnum and related members of both Lithospermeae, the tribe to which it is assigned, and Boraginaceae. Lithospermum is supported as monophyletic, and the genus is hypothesized to have originated in the Old World, after which there was one colonization of the New World. The heterostylous breeding system is inferred to have originated within Lithospermum either seven times or six times with one loss, and with other independent origins within Lithospermeae. The stability of the 10-region matrix is investigated, as are the number and combination of regions necessary to accurately reconstruct phylogenies. The combination of concatenated regions is important, and the following regions are recommended for future phylogenetic studies of genera of Boraginaceae: the rpl16 intron, matK, psbA-trnH, trnL-rpl32, and trnQ-rps16. The use of these recommended regions is conservative, and it contrasts with most intrageneric studies of Boraginaceae, which often are based on the trnL-trnF spacer and nuclear ribosomal ITS.
language: eng
source: Alma/SFX Local Collection
identifier: ISSN: 0363-6445
fulltext: fulltext
issn:
  • 0363-6445
  • 1548-2324
url: Link


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titleMolecular Phylogenetics, Molecular Evolution, and Patterns of Clade Support in Lithospertnum (Boraginaceae) and Related Taxa
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descriptionUtilizing 10 cpDNA regions and thorough taxon sampling, a phylogeny is reconstructed for Lithospertnum and related members of both Lithospermeae, the tribe to which it is assigned, and Boraginaceae. Lithospermum is supported as monophyletic, and the genus is hypothesized to have originated in the Old World, after which there was one colonization of the New World. The heterostylous breeding system is inferred to have originated within Lithospermum either seven times or six times with one loss, and with other independent origins within Lithospermeae. The stability of the 10-region matrix is investigated, as are the number and combination of regions necessary to accurately reconstruct phylogenies. The combination of concatenated regions is important, and the following regions are recommended for future phylogenetic studies of genera of Boraginaceae: the rpl16 intron, matK, psbA-trnH, trnL-rpl32, and trnQ-rps16. The use of these recommended regions is conservative, and it contrasts with most intrageneric studies of Boraginaceae, which often are based on the trnL-trnF spacer and nuclear ribosomal ITS.
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abstractUtilizing 10 cpDNA regions and thorough taxon sampling, a phylogeny is reconstructed for Lithospertnum and related members of both Lithospermeae, the tribe to which it is assigned, and Boraginaceae. Lithospermum is supported as monophyletic, and the genus is hypothesized to have originated in the Old World, after which there was one colonization of the New World. The heterostylous breeding system is inferred to have originated within Lithospermum either seven times or six times with one loss, and with other independent origins within Lithospermeae. The stability of the 10-region matrix is investigated, as are the number and combination of regions necessary to accurately reconstruct phylogenies. The combination of concatenated regions is important, and the following regions are recommended for future phylogenetic studies of genera of Boraginaceae: the rpl16 intron, matK, psbA-trnH, trnL-rpl32, and trnQ-rps16. The use of these recommended regions is conservative, and it contrasts with most intrageneric studies of Boraginaceae, which often are based on the trnL-trnF spacer and nuclear ribosomal ITS.
pubAmerican Society of Plant Taxonomists