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Angiosperm divergence times: congruence and incongruence between fossils and sequence divergence estimates
Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Faculty of Science and Technology, Biology, Department of Evolutionary Biology. Department of Evolution, Genomics and Systematics, Systematic Botany. Systematisk Botanik.
2003 (English)In: Telling the Evolutionary Time: Molecular Clocks and the Fossil Record, Taylor & Francis , 2003, 142-165 p.Chapter in book (Refereed)
Abstract [en]

The documentation of derived angiosperm lineages from increasingly older geological deposits, and growing evidence of considerable diversity in ower, seed, and pollen morphology in the mid-Cretaceous both imply that the timing of early angiosperm cladogenesis may be older then our current fossil-based estimates indicate. An alternative to fossils for calibrating the phylogenetic tree comes from divergence in DNA sequence data. Here, we report on an analysis using non-parametric rate smoothing and a three gene dataset covering c. 75 per cent of all angiosperm families recognized in recent classi cations. The results provide an initial hypothesis of angiosperm diversi cation times; by using an internal calibration point, an independent evaluation of angiosperm and eudicot origins is accomplished. Results are compared with fossil-based estimates of both magnolids and eudicot divergence times, and possible directions of future analyses are discussed.

Place, publisher, year, edition, pages
Taylor & Francis , 2003. 142-165 p.
URN: urn:nbn:se:uu:diva-47918ISBN: 0415275245OAI: oai:DiVA.org:uu-47918DiVA: diva2:75825
Available from: 2005-05-19 Created: 2005-05-19

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Wikström, Niklas
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