| Abstract Detail
Systematics Section / ASPT Milton, Ethan F. [1], Weston, Peter H. [2], Mast, Austin [1]. The diversification of ecologically significant traits in the species-rich Australian genus Hakea (Proteaceae). THE Australian genus Hakea (149 spp.) is mostly composed of shrubs from dry, open, fire-swept environments. With the closely related genus Grevillea (363 spp.), Hakea forms a large lineage whose increased net diversification rate appears to have been driven by the aridification of Australia in the mid- to late-Tertiary. We infer a phylogeny for the group with sequences of the rpl16 intron and the matK and atpB genes from a third of the species in Hakea and close relatives in Grevillea. This sampling represents 29 of the 31 informal groups currently recognized in Hakea. In the inferred phylogeny, Hakea is monophyletic with a basal trichotomy made up of a clade composed of the small Trineura group, a clade composed of 6 of the informal groups (previously recognized in morphological results as the “Multilineata clade”), and a clade composed of the remaining species. On the phylogeny, we will examine the inferred evolution of ecologically significant traits, including leaf morphology and anatomy, fire-survival strategies, and habit.
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Related Links:
Mast Faculty Web Page
1 - Florida State University, Department of Biological Sciences, Tallahasse, Florida, 32306-1100, USA
2 - Royal Botanic Gardens, Mrs Macquaries Road, Sydney, New South Wales, 2000, Australia
Keywords:
Proteaceae
Australia
Hakea
phylogeny
evolution
fire
leaf evolution
habit.
Presentation Type: Poster:Posters for Sections
Session: 48-165
Location: Auditorium/Bell Memorial Union
Date: Tuesday, August 1st, 2006
Time: 12:30 PM
Abstract ID:324 |
