Annals of Botany Lecture
Kress, John .
A global DNA barcode for plants: fact or fantasy?
DNA barcoding is an aid to identification that uses a standard short genomic region that is universally present in target lineages and has sufficient sequence variation to discriminate among species. Barcoding is already emerging as one of the many important tools on the modern taxonomist’s work bench despite the debate and controversy among some scientists over the feasibility and utility of genetic identifiers in taxonomic and other applied studies. Discovery of a DNA barcode for land plants has been limited by intrinsically lower rates of sequence evolution in plant genomes than that observed in animals. This low rate has complicated the trade-off in finding a locus that is universal and readily sequenced and has sufficiently high sequence divergence at the species-level. A combination of coding and non-coding regions of the plastid genome may provide the necessary universality and species discrimination for an effective plant barcode.
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1 - Smithsonian, Botany, PO Box 37012, Washington, D.C, 20013-7012, USA
Presentation Type: Special Presentation
Location: Stevens 5/Hilton
Date: Tuesday, July 10th, 2007
Time: 10:00 AM