Polyphyly of the fern family Tectariaceae sensu Ching: insights from cpDNA sequence data |
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Authors: | Liu HongMei Zhang XianChun Chen ZhiDuan Dong ShiYong Qiu YinLong |
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Institution: | 1.State Key Laboratory of Systematic and Evolutionary Botany,Institute of Botany, Chinese Academy of Sciences,Beijing,China;2.Graduate University of Chinese Academy of Sciences,Beijing,China;3.South China Botanical Garden,Chinese Academy of Sciences,Guangzhou,China;4.Department of Ecology and Evolutionary Biology,University of Michigan,Ann Arbor,USA |
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Abstract: | Tectariaceae are a pantropical fern family of about 20 genera, among which 8 are distributed in China. The morphological distinctiveness
of the family is widely recognized, yet relatively little systematic research has been conducted on members of Tectariaceae.
Phylogenetic analyses of chloroplast DNA sequence data (rbcL and atpB) from 15 species representing all 8 genera in China were carried out under parsimony criteria and Bayesian inference. The
phylogenetic reconstructions indicated that the fern family Tectariaceae as traditionally circumscribed are polyphyletic.
Ctenitis, Dryopsis, Lastreopsis clustered with and should be included within the newly-defined Dryopteridaceae, and Pleocnemia is also tentatively assigned to it. A narrowly monophyletic Tectariaceae is identified, which includes Ctenitopsis, Hemigramma, Pteridrys, Quercifilix, and Tectaria. In the single rbcL analysis, Arthropteris clustered with the above-mentioned monophyletic Tectariaceae. Although further investigations are still needed to identify
infrafamilial relationships within the monophyletic Tectariaceae and to redefine several problematic genera, we propose a
working concept here that better reflects the inferred evolutionary history of this group. |
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Keywords: | Tectariaceae polyphyly rbcL atpB |
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