Talent, Nadia , Joly, Simon , Macklin, James , Phipps, James B. , Burgess, Michael B. , Lewis, Walter .
A renewed focus on species concepts in the Rosaceae.
As highlighted particularly by the Flora of North America project, “the species problem” is once again a central issue in Rosaceae that demands the most careful scrutiny, and a practical solution applicable across this diverse family. Recent work on molecular and morphological phylogenies and on the breeding systems of individual genera have greatly expanded our knowledge, demonstrating even more forcefully that the biological species concept can be more or less difficult to apply in different groups. Both ancient and recent reticulations are known, but are not yet fully mapped. Many genera of Rosaceae are complicated by polyploidy, hybridization, or apomixis, but these do not necessarily occur together, and the evolutionary consequences differ greatly. What are the most practical approaches to assembling data for species delimitation? Does hybridization undermine the species concepts? How do we achieve comparable species definitions in apomictic and other polyploid complexes? Should different ploidy levels be placed in the same species?
This workshop will feature a panel discussion introduced and moderated by James Macklin (Harvard University Herbaria). The five or six speakers bring different perspectives from the different groups, andinclude some of the most experienced workers in this field, and people who are applying their recent training to these questions. Speakers
include Walter Lewis (Washington University), James B. Phipps (University of Western Ontario), Michael B. Burgess (University of Maine), Simon Joly (Massey University) and Nadia Talent (Royal Ontario Museum).
An initial presentation by each speaker will be limited to just 10 minutes, followed by interaction between the speakers and with the audience. A lively and thought-provoking discussion is anticipated.
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1 - Royal Ontario Museum - Green Plant Herbarium (TRT), Department of Natural History, 100 Queen's Park, Toronto, Ontario, M5S 2C6, CANADA
2 - Royal Ontario Museum, Center for Biodiversity & Conservation Biology, Green Plant Herbarium (TRT), Department of Natural History, Toronto, M5S 2C6, Canada
3 - Massey University, Allan Wilson Centre, Private Bag 11 222, Palmerston North 4442, New Zealand
4 - Harvard University Herbaria, Organismic and Evolutionary Biology, 22 Divinity Avenue, Cambridge, MA, 02138, United States
5 - University of Western Ontario, Department of Biology, Biological & Geological Building, 1151 Richmond St, London, Ontario, N6A 5B7, Canada
6 - University of Maine, Department of Biological Sciences, 5751 Murray Hall, Orono, ME, 04469, USA
7 - Washington University, Department of Biology, 1 Brookings Drive, Rebstock Hall, St. Louis, Missouri, 63130, USA
Flora of North America Project.
Presentation Type: Workshop
Location: Murrin 2/Gage
Date: Sunday, July 27th, 2008
Time: 8:00 AM