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| Title: | A phylogenetic analysis of Apostasioideae (Orchidaceae) based on ITS, trn L-F and mat K sequences |
| Authors: | Kocyan, A.
Conti, E.
Qiu, Yin-Long
Endress, P. K. |
| Issue Date: | Aug-2004 |
| Publisher: | Springer-Verlag; Springer-Verlag Wien |
| Citation: | Kocyan, A.; Qiu, Y.-L.; Endress, P. K.; Conti, E.; (2004). "A phylogenetic analysis of Apostasioideae (Orchidaceae) based on ITS, trn L-F and mat K sequences." Plant Systematics and Evolution 247 (3-4): 203-213. <http://hdl.handle.net/2027.42/41641> |
| Abstract: | The orchid subfamily Apostasioideae consists of two genera, Apostasia and Neuwiedia . To study the position of Apostasioideae within Orchidaceae and their intra- and intergeneric relationships, a molecular phylogenetic analysis has been conducted on the nuclear ITS region and the two plastid DNA regions trn L-F intron and mat K. The two genera traditionally ascribed to Apostasioideae are each monophyletic. In Apostasia , A. nuda , with two stamens and no staminode, is sister to a clade comprising three species characterised by two stamens and one staminode. Within Neuwiedia , maximum parsimony analyses place N. zollingeri as sister to the clade formed by N. borneensis and N. veratrifolia . A family-wide phylogenetic analysis of mat K sequences representing all proposed subfamilies of Orchidaceae produced five moderately to well-supported clades. One of these clades, Apostasioideae, is sister to the clade formed by Vanilloideae, Cypripedioideae, Orchidoideae and Epidendroideae. High transition-transversion ratio and the absence of stop codons in the individual sequences suggest that mat K is at the transition from a possibly functional gene to a pseudogene in Apostasioideae, contrary to what is found in some other groups of Orchidaceae. |
| ISSN: | 0378-2697
1615-6110 |
| DOI: | 10.1007/s00606-004-0133-3 |
| Appears in Collections: | Interdisciplinary and Peer-Reviewed
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