Journal article
Divergent lineages in two species of dendrobium orchids (D. speciosum and D. tetragonum) correspond to major geographical breaks in eastern Australia
JM Burke, PY Ladiges, EL Batty, PB Adams, MJ Bayly
Journal of Biogeography | WILEY-BLACKWELL | Published : 2013
DOI: 10.1111/jbi.12145
Abstract
Aim: We investigated genetic divergence among two widespread eastern Australian orchids (Dendrobium sect. Dendrocoryne): Dendrobium speciosum and Dendrobium tetragonum. These orchids are endemic to mesic habitats, with distributional ranges that cross major geographical breaks associated with deep divergences in various fauna. We compared the biogeography of these orchids with other taxa and tested for congruence of divergence date estimations. Location: Eastern Australia, latitude 14° S to 34° S. Methods: Phylogenetic relationships within each species were estimated using maximum parsimony based on sequences of internal transcribed spacer (ITS) regions of nuclear ribosomal DNA and the psbA-..
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Funding Acknowledgements
We thank Jim Bataldo and Bruce Gray for providing some of the plant material used in the study, Sheryl Lawson for assistance, and Gareth Nelson for reading the manuscript. P. B. A. acknowledges the Queensland Department of Environment and Resource Management for collecting permits. J.M.B. received an Australian Postgraduate Award and a Hansjorg Eichler Scientific Research Grant from the Australasian Systematic Botany Society.