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Phylogenetic relationships of the Hamamelidaceae inferred from sequences of internal transcribed spacers (ITS) of nuclear ribosomal DNA
Author(s) -
Li Jianhua,
Bogle A. Linn,
Klein Anita S.
Publication year - 1999
Publication title -
american journal of botany
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.218
H-Index - 151
eISSN - 1537-2197
pISSN - 0002-9122
DOI - 10.2307/2656620
Subject(s) - biology , sensu , internal transcribed spacer , phylogenetic tree , ribosomal dna , monophyly , botany , petal , phylogenetics , evolutionary biology , clade , genetics , gene , genus
Intergeneric relationships in the Hamamelidaceae have long been controversial. In this study, sequences of the internal transcribed spacers of nuclear ribosomal DNA were used to reconstruct the phylogeny for the Hamamelidaceae. Three major clades were recognized in the ITS‐based phylogenetic tree: (1) Mytilaria‐Exbucklandia‐Rhodoleia , (2) Disanthus , and (3) the Hamamelidoideae. Within the Hamamelidoideae there were three well‐supported lineages: (1) Corylopsis‐Loropetalum‐Tetrathyrium‐Maingaya‐Matudaea , (2) Eustigmateae sensu Endress, plus Molinadendron ‐Dicoryphinae, and (3) Hamamelis ‐Fothergilleae sensu Endress, excluding Matudaea and Molinadendron. The Exbucklandioideae sensu Endress were not monophyletic, nor were the tribes in the Hamamelidoideae in their current circumscriptions except for the Corylopsideae. Strap‐shaped petals, apetaly, and wind pollination have evolved three times independently in the Hamamelidaceae s.s. (Hamamelidaceae minus Altingioideae), suggesting that homoplasy should be considered in future classifications of the family.