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The monophyly and rapid evolution of <i>Gentiana</i> sect. <i>Chondrophyllae</i> Bunge s.l. (Gentianaceae): evidence from the nucleotide sequences of the internal transcribed spacers of nuclear ribosomal DNA
Auteur(s)
Yuan, Yong-Ming
Date de parution
1997
In
Botanical Journal of the Linnean Society, Wiley, 1997/123/1/25-43
Résumé
The nucleotide sequences of the internal transcribed spacers (ITS) of nuclear ribosomal DNA of 24 representative species of sect. <i>Chondrophyllae s.l. </i> have been determined and analysed phylogenetically, together with some species of other sections of the genus <i>Gentiana</i>. The ITS sequences strongly support the monophyly of the sect. <i>Chondrophyllae s.l. </i> as a whole complex including various different dysploid cytotypes. Species, such as <i>G. boryi</i> and <i>G. pyrenaica</i>, that had been split into distinct genera by some cytotaxonomists have been proven to be closely related. However, the ITS sequences do not provide sufficient information to make a robust estimation of the phylogenetic relationships among the closely related species and dysploid cytotypes of the complex, beyond recognizing their monophyly and rapid evolution.
Identifiants
Type de publication
journal article
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