Abstract Detail

Systematics

Chan, Patricia [1], Lemmon, Emily [2], Lemmon, Alan [3], Barrett, Matthew [4], Givnish, Thomas [5].

Molecular phylogenomics, historical biogeography, floral evolution, gene flow, and species diversification in Darwinia (Myrtaceae).

Darwinia (Myrtaceae) includes ca. 65 shrubby species restricted to the ancient, highly infertile landforms of Western Australia, many with exceptionally narrow geographic ranges, highly divergent inflorescences seemingly adapted to insect, bird, or marsupial pollination, and hints of short-distance seed dispersal by ants or gravity. Darwinia thus provides an ideal system with which to evaluate the relative roles of several factors – limited dispersal, topographic and edaphic diversity, and plant-pollinator coevolution – in driving species diversification. Previous analyses based on nuclear DNA sequences produced a poorly resolved phylogeny with many unres¬olved or unsupported nodes, indicating the need for more powerful data for studying Darwinia evolution. I am currently working on the phylogeny, historical biogeography, floral evolution, spatial scale of gene flow, and apparent drivers of species diversification in Darwinia, based on sequencing and analyzing whole plastomes and hundreds of single-copy nuclear genes, together with pollination studies and population genomic analyses.

1 - University Of Wisconsin Madison, Botany, Birge Hall, Madison, WI, 53703, United States
2 - Florida State University, Biological Science, 213 Biomedical Research Facility, Tallahasee, FL
3 - Florida State University, Biological Science, 400 Dirac Science Library, Tallahasee, FL, 32306, USA
4 - James Cook University, Australian Tropical Herbarium, McGregor Rd, Smithfiled, QLD, 4878, Australia
5 - University Of Wisconsin-Madison, Department Of Botany, 315 Birge Hall, 430 Lincoln Drive, Madison, WI, 53706, United States

Keywords:
systematics
Evolution
ecology
phylogenomics
Darwinia
Myrtaceae
Myrtales
Historical biogeography
target-capture
population genetics
Pollination syndromes
sky island
Inflorescence
Floral morphology
gene flow
Australia
Southwest Australia floristic province
plastome
seed dispersal.

Presentation Type: Poster
Number: PSY010
Abstract ID:965
Candidate for Awards:None