Species Phylogeny versus Gene Trees: A Case Study of an Incongruent Data Matrix Based on <i>Paphiopedilum</i> Pfitz. (Orchidaceae)
The phylogeny of the genus <i>Paphiopedilum</i> based on the plastome is consistent with morphological analysis. However, to date, none of the analyzed nuclear markers has confirmed this. Topology incongruence among the trees of different nuclear markers concerns entire sections of the s...
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| Auteurs principaux: | , , , , , , |
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| Format: | article |
| Langue: | EN |
| Publié: |
MDPI AG
2021
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| Sujets: | |
| Accès en ligne: | https://doaj.org/article/d57c7a6ce3084606aa8bf039bc1c2f7c |
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| Résumé: | The phylogeny of the genus <i>Paphiopedilum</i> based on the plastome is consistent with morphological analysis. However, to date, none of the analyzed nuclear markers has confirmed this. Topology incongruence among the trees of different nuclear markers concerns entire sections of the subgenus <i>Paphiopedilum</i>. The low-copy nuclear protein-coding gene <i>PHYC</i> was obtained for 22 species representing all sections and subgenera of <i>Paphiopedilum</i>. The nuclear-based phylogeny is supported by morphological characteristics and plastid data analysis. We assumed that an incongruence in nuclear gene trees is caused by ancestral homoploid hybridization. We present a model for inferring the phylogeny of the species despite the incongruence of the different tree topologies. Our analysis, based on six low-copy nuclear genes, is congruent with plastome phylogeny and has been confirmed by phylogenetic network analysis. |
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