FAY, MICHAEL F.1*, KATE BORLAND2, PENELOPE STRANC2, and MARK W. CHASE1. 1Royal Botanic Gardens, Kew, Richmond TW9 3DS, UK; 2Smith College, Northampton, MA 01063, USA. - Phylogenetics of the genusTulipa(Liliaceae): evidence from five plastid DNA regions.
Sequence analyses of five plastid DNA regions (part of the
matKexon, the trnLintron, the trnL-Fintergenic
spacer, and the rpl12and rps16introns, totalling more
than 3700 characters in the aligned matrix) were used to investigate
the monophyly of Tulipaand its relationships with other genera
of Liliaceae. If the genus Amanais recognised for T.
edulisand allies, the remainder of Tulipais strongly
supported as monophyletic. Amanaand Erythroniumare the
closest relatives of Tulipas.s. In Tulipa, two major
clades, more or less corresponding to Tulipasections
Tulipa(Leiostemones) and Eriostemonesas
recognised by Hall (1940), are strongly supported, but resolution
within these clades is poor, due to low levels of sequence divergence.
Tulipa sprengeri, treated as an isolated species by Hall, is
shown to be a member of section Eriostemones, and at least some
members of subsection Clusianae, section Tulipa, fall in
an isolated position closer to T. uniflora(thought by Hall to
be a member of Tulipasection Orithyia) than to members
of section Tulipa. These results will be discussed in terms of
the morphology and ability of the different taxa to hybridize with
Key words: Amana, Erythronium, Liliaceae, molecular phylogenetics, Tulipa