| Abstract Detail
Systematics Section / ASPT Pfeil, Bernard E. [1], Bayer, Randall J. [2]. Assessing hybridisation, lineage sorting and rapid radiation in Citrus. The taxonomy and phylogeny of Citrus has been a challenge probably for the following reasons: a 4,000 year history of human cultivation, hybridisation and selection (especially of somatic mutations); unusual reproductive biology, such as clonal reproduction via nucellar embryogenesis; a fairly recent radiation of the main genetic diversity; and the ability to hybridise with related genera. This talk will focus on advances in understanding the phylogeny. Studies using one or two cpDNA regions found little phylogenetic resolution, but with many regions added and clear improvements obtained, not all relationships are resolved. Therefore, rapid radiation is suggested. However, untangling the effects of lineage sorting from rapid radiation requires further examination. Nuclear DNA phylogenies have the power to capture both parental lineages of hybridisation events, as well as provide insight into the scope of lineage sorting via coalescence methods. Log in to add this item to your schedule
1 - CSIRO Plant Industry, GPO Box 1600, Canberra, ACT, 2601, Australia 2 - University of Memphis, Department of Biology, 3774 Walker Avenue, Memphis, TN, 38152, USA
Keywords: hybridisation lineage sorting radiation Low-copy Nuclear Markers coalescence.
Presentation Type: Oral Paper:Papers for Sections Session: CP54 Location: International Ballroom South/Hilton Date: Wednesday, July 11th, 2007 Time: 3:00 PM Number: CP54007 Abstract ID:1301 |