New Zealand Journal of Botany abstracts
Phylogenetic relationships of species of Aciphylla (Apiaceae, subfamily
Apioideae) and related genera using molecular, morphological, and combined data
sets
ELIZABETH A. RADFORD*
MARK F. WATSON +
JILL PRESTON
Royal Botanic Garden Edinburgh
20A Inverleith Row
Edinburgh, EH3 5LR
Scotland, UK
*Present address: Plantlife, 21 Elizabeth Street, London, SW1W 9RP, UK.
Abstract Evolutionary relationships of the Australasian genus
Aciphylla were investigated using cladistic analyses of molecular
(internal transcribed spacer regions 18S-26S nuclear ribosomal DNA),
morphological, and combined data sets. Molecular sequence data provide support
for infrageneric groups within
Aciphylla and show some agreement with
species groups suggested by previous authors. Cladistic analysis of
morphological characters traditionally used to describe species within
Aciphylla shows virtually no resolution of relationships, indicating
considerable homoplasy within the data set. Analysis of combined molecular and
morphological data reveals infrageneric groups that concur with those inferred
by the molecular analysis, and shows increased resolution at the species level.
The phylogeny resulting from the combined analysis provides a good framework
for the interpretation of morphological characters in
Aciphylla.
Monophyly of
Aciphylla is unresolved in all analyses. The Tasmanian
endemic
Anisotome procumbens is unexpectedly placed in a clade
with those New Zealand
Aciphylla species (
Aciphylla dobsonii and
A. simplex) that have retained the most ancestral character states.
Other Australasian Apioideae (
Gingidia in part,
Lignocarpa, and
Scandia) are placed within the larger
Aciphylla clade with those
species that show an accumulation of derived character states for
Aciphylla.
Anisotome appears paraphyletic with respect to
Aciphylla and the majority of
Gingidia species. Taxonomic and
biogeographical relationships within
Aciphylla and related genera are
discussed in the light of the inferred phylogeny.
Keywords Aciphylla; Anisotome; Apiaceae;
Apioideae; biogeography; cladistic analysis; combined data; Internal
Transcribed Spacer (ITS); Gingidia; Lignocarpa; morphological
data; phylogenetic relationships; nuclear ribosomal DNA sequences;
Scandia; systematics; taxonomy; Umbelliferae
+Author for correspondence.
Email:
m.watson@rbge.org.uk
B00008
Received 10 April 2000; accepted
12 December 2000
New Zealand Journal of Botany, 2001, Vol. 39: 183-208
0028-825X/01/3902-0183 $7.00 (c) The Royal Society of New Zealand 2001
PDF file of entire paper: medium quality (2000K); (scanned from paper original: notes about this process)
This year's abstracts |
Journal home page |
All abstracts |
Publishing home page
