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Abstract Detail


Biogeography

Cardinal-McTeague, Warren [1], Sytsma, Kenneth J. [2], Hall, Jocelyn [3].

Biogeography of core Brassicales.

The core Brassicales (Brassicaceae, Capparaceae, Cleomaceae, Forchhammeria, Gyrostemonaceae, Pentadiplandraceae, Resedaceae, Tirania, and Tovariaceae) is a morphologically diverse group of families that present complex biogeographic patterns. The Capparaceae, Cleomaceae, plus Brassicaceae clade houses the greatest number of species (circa 4,000) and all three families exhibit a cosmopolitan distribution. Interestingly, subclades within Capparaceae are strongly correlated with geographic distribution. In contrast, lineages such as Pentadiplandraceae house fewer species with more isolated and restricted distributions. We present phylogenetic relationships of the order and specifically the core Brassicales based on both plastid (matK, rbcL, ndhF) and mitochrondial (rps3, matR) genomes with broad sampling across the entire order. Using multiple calibrations with previously unused fossils of Brassicales, Bayesian analyses were employed to infer ages of various clades, focusing on disjunct distributions. Phylogenetic results, lineage dates and inferred biogeographic history are discussed.

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1 - University of Alberta, Department of Biological Sciences , CW 405 Biological Sciences Building, University of Alberta, Edmonton, AB, T6G 2E9, Canada
2 - University of Wisconsin-Madison, Department of Botany, Birge Hall, 430 Lincoln Drive, Madison, WI, 53706-1381, USA
3 - University of Alberta, Department of Biological Sciences, Room: B 608, Biological Sciences Bldg., Edmonton, Alberta, T6G 2E9, Canada

Keywords:
Brassicales
Biogeography
divergence time estimates
chloroplast DNA
mitochondrial DNA.

Presentation Type: Poster:Posters for Topics
Session: P
Location: Hall A/Convention Center
Date: Monday, August 2nd, 2010
Time: 5:30 PM
Number: PBG007
Abstract ID:275


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