Literaturdatenbank
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Starkey, D. E. , Phylogenetics: uses & misuses or why do we need so many trees? Paper presented at Turtle Survival Alliance 2007 Annual Meeting.
Added by: Sarina Wunderlich (01 Jan 2009 23:10:45 UTC) |
| Resource type: Proceedings Article BibTeX citation key: Starkey2007 View all bibliographic details  |
Categories: General Keywords: Genetik = genetics, Schildkröten = turtles + tortoises, Systematik = taxonomy Creators: Starkey Collection: Turtle Survival Alliance 2007 Annual Meeting |
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| Abstract |
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Phylogenetics is the field of study used to investigate the evolutionary history of a group of organisms. A number of methods (parsimony, likelihood, and distance) are commonly used to analyze the relationships amongst organisms and using the alignment of nucleotides or amino acid sequences a hypothesis of the relationships of these organisms can be generated and depicted as a “tree”. In the last decade, the amount of data that can be analyzed to examine a given set of relationships has risen dramatically, and in some cases whole mitochondrial genomes are being utilized to examine these questions. As the field continues to grow a number of important questions remain unanswered. For example, a debate still exists regarding the number of taxa sampled versus the number of basepairs sampled per taxon. Additionally, there are concerns regarding the use of strictly mtDNA data sets versus those that combine nuclear and mtDNA. In this talk, I will outline the general principles used in studies of this type and highlight the need for a more robust strategy to examine the evolutionary history of a group, and ultimately define its species boundaries.
Added by: Sarina Wunderlich |