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A molecular phylogeny for the large African orchid genus Disa by Benny Bytebier; Dirk U. Bellstedt; H. Peter Linder is a Biochemistry, Genetics and Molecular Biology article available to read on EtoBox.

What is A molecular phylogeny for the large African orchid genus Disa about?

Phylogenetic relationships were inferred for the African subtribe Disinae (Orchidoideae, Orchidaceae), which include the large genus Disa and the small genus Schizodium. One nuclear (ITS) gene region and two plastid (trnLF and matK) gene regions were sequenced for 136 ingroup, representing 70% of all known Disinae species, as well as for 7 outgroup taxa. The combined data matrix contained 4094 characters and was analysed using parsimony and Bayesian inference. Our results show that the generic status of Schizodium can no longer be supported, as it is deeply embedded within the genus Disa. Furthermore, the currently recognised subgenera do not reflect the phylogenetic relationships and should be rejected. Several of the currently recognised sections are monophyletic, others contain misplaced elements, while some are polyphyletic. Morphological divergence, rather than convergence, has hampered previous attempts at a phylogenetic classification of the Disinae. On the basis of our molecular phylogenetic hypothesis, we propose a monotypic subtribe Disinae and a subdivision of the genus Disa into 18 sections.

Who reads A molecular phylogeny for the large African orchid genus Disa?

Author

Benny Bytebier; Dirk U. Bellstedt; H. Peter Linder

Publisher

Elsevier Science; Elsevier ; Elsevier Inc.; Elsevier BV (ISSN 1055-7903)

Published

2007

Language

EN

Field

Biochemistry, Genetics and Molecular Biology (Life Sciences)