New Zealand Journal of Botany abstract
Phylogenetic relationships in Australasian Gnaphalieae (Compositae) inferred
from ITS sequences
ILSE BREITWIESER
DAVID S. GLENNY
ANITA THORNE
STEVEN J. WAGSTAFF
Landcare Research
P.O. Box 69
Lincoln, New Zealand
Abstract Analyses of ITS sequences of Australasian
Gnaphalieae reveal at least six distinct lineages of Gnaphalieae in New
Zealand. Our results suggest that the New Zealand species of
Craspedia
form a monophyletic group, which originated in Australia. The stoloniferous
species of
Euchiton are clearly separated from the non-stoloniferous
species. They are not closely related to any other New Zealand gnaphalioid
taxon. The Australian species of
Ewartia are a polyphyletic group and
are not closely related to the sole New Zealand species,
Ewartia
sinclairii. An almost endemic New Zealand clade consists of species
currently included in
Anaphalioides,
Ewartia,
Helichrysum,
Leucogenes,
Rachelia, and
Raoulia. It appears that the New
Zealand clade diversified rapidly soon after the arrival of its ancestor in New
Zealand. The relationships of
Ozothamnus leptophyllus are poorly
resolved.
Pseudognaphalium luteoalbum emerges with mainly Asian and
South American Gnaphalieae.
Keywords Compositae; Asteraceae; Gnaphalieae;
Anaphalioides; Anaphalis; Craspedia; Ewartia;
Euchiton; Helichrysum; Leontopodium; Leucogenes;
Lucilia; Ozothamnus; Pseudognaphalium; Pycnosorus;
Raoulia; ITS1; ITS2; internal transcribed spacers; DNA sequence; New
Zealand; Australia; New Guinea
B98060
Received 30 October 1998; accepted 15 March 1999
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