A1 Refereed original research article in a scientific journal
Molecular phylogenetics of the Meteoriaceae s. str.: focusing on the genera Meteorium and Papillaria
Authors: Quandt D, Huttunen S, Streimann H, Frahm JP, Frey W
Publisher: ACADEMIC PRESS INC ELSEVIER SCIENCE
Publication year: 2004
Journal: Molecular Phylogenetics and Evolution
Journal name in source: MOLECULAR PHYLOGENETICS AND EVOLUTION
Journal acronym: MOL PHYLOGENET EVOL
Volume: 32
Issue: 2
First page : 435
Last page: 461
Number of pages: 27
ISSN: 1055-7903
DOI: https://doi.org/10.1016/j.ympev.2003.12.012
Abstract
In order to delimit and understand the evolution of the Meteoriaceae, we provide phylogenetic analyses using the internal transcribed spacer 2 (ITS2) of nuclear ribosomal DNA in combination with two plastid markers, trnL-F and psbT-H. In contrast to the widely used trnL-F region, the psbT-H gene cluster, coding for proteins of photosystem II, has been rarely used to address systematic questions among the different land plant lineages. To overcome the problem of potential ambiguous alignments of non-coding DNA regions, the data were independently analyzed using direct optimization. The comparison and evaluation of the obtained results showed that the inferred cladograms based on the different phylogenetic approaches are very similar, with only minor differences. In combination with morphological characters, generic relationships as well as taxonomic and nomenclatural problems, especially regarding the key genera Meteorium and Papillaria are discussed in detail. New insights into generic relationships of the Meteoriaceae are provided, such as the exclusion of the monospecific southern South American genera Ancistrodes and Cryphaeophilum, which are subsequently transferred to the Hookeriaceae and Cryphaeaceae, respectively. Phylogenetic reconstructions using maximum likelihood as well as parsimony approaches reveal that at the familial level the Meteoriaceae s.1. are polyphyletic, if the formerly recognized "Trachypodaceae" are considered as a separate family. Based on our results we favor the synonym of the Trachypodaceae with the Meteoriaceae. (C) 2004 Published by Elsevier Inc.
In order to delimit and understand the evolution of the Meteoriaceae, we provide phylogenetic analyses using the internal transcribed spacer 2 (ITS2) of nuclear ribosomal DNA in combination with two plastid markers, trnL-F and psbT-H. In contrast to the widely used trnL-F region, the psbT-H gene cluster, coding for proteins of photosystem II, has been rarely used to address systematic questions among the different land plant lineages. To overcome the problem of potential ambiguous alignments of non-coding DNA regions, the data were independently analyzed using direct optimization. The comparison and evaluation of the obtained results showed that the inferred cladograms based on the different phylogenetic approaches are very similar, with only minor differences. In combination with morphological characters, generic relationships as well as taxonomic and nomenclatural problems, especially regarding the key genera Meteorium and Papillaria are discussed in detail. New insights into generic relationships of the Meteoriaceae are provided, such as the exclusion of the monospecific southern South American genera Ancistrodes and Cryphaeophilum, which are subsequently transferred to the Hookeriaceae and Cryphaeaceae, respectively. Phylogenetic reconstructions using maximum likelihood as well as parsimony approaches reveal that at the familial level the Meteoriaceae s.1. are polyphyletic, if the formerly recognized "Trachypodaceae" are considered as a separate family. Based on our results we favor the synonym of the Trachypodaceae with the Meteoriaceae. (C) 2004 Published by Elsevier Inc.
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