Use of simultaneous analyses to guide fossil-based calibrations of Pinaceae phylogeny Public Deposited

http://ir.library.oregonstate.edu/concern/defaults/2514nm27g

Article appears in International Journal of Plant Science ( http://www.journals.uchicago.edu/toc/ijps/current), is copyrighted by University of Chicago Press ( http://www.press.uchicago.edu/), and can be found at:  http://www.journals.uchicago.edu/doi/abs/10.1086/590472

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  • Uncertainties in the age and phylogenetic position of Pinaceae fossils present significant obstacles to our understanding of the timing of diversification in the family. We demonstrate that simultaneous phylogenetic analyses of chloroplastDNA(matK and rbcL) and nonmolecular characters that include both extant genera and a limited number of fossil taxa provide useful hypotheses for calibrating molecular trees. Root placements varied for Pinaceae, with Bayesian analyses recovering mutually monophyletic subfamilies Pinoideae and Abietoideae and parsimony analyses recovering Abietoideae as paraphyletic by placing the root between Cedrus and the remaining genera. The inferred phylogenetic positions of fossil taxa Pityostrobus bernissartensis as the sister group to Pinus and Pseudolarix erensis as the sister group to extant Pseudolarix were used to guide divergencetime calibrations; these calibrations yielded an Early Cretaceous and an Early Jurassic age for crown-group Pinaceae, respectively. The older age estimates based on Pseudolarix erensis are supported by weaker evidence from the fossil record but are consistent with recent reports of Early Cretaceous leaf fossils that appear to coincide with extant genera. There remains a great need to characterize the anatomy of extant and fossil species and to code additional nonmolecular characters.
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  • Gernandt, D. S., Magallón, S., López, G. G., Flores, O. Z., Willyard, A., & Liston, A. (2008). Use of simultaneous analyses to guide fossil-based calibrations of Pinaceae phylogeny [Electronic version]. International Journal of Plant Sciences, 169(8), 1086-1099.
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  • description.provenance : Approved for entry into archive by Linda Kathman(linda.kathman@oregonstate.edu) on 2010-02-22T14:50:23Z (GMT) No. of bitstreams: 1 Liston.UseSimultaneousAnalyses.pdf: 1433269 bytes, checksum: dd98db2b4466b04fcea9f3911c5e6b11 (MD5)
  • description.provenance : Submitted by David Moynihan (dmscanner@gmail.com) on 2010-02-19T19:15:26Z No. of bitstreams: 1 Liston.UseSimultaneousAnalyses.pdf: 1433269 bytes, checksum: dd98db2b4466b04fcea9f3911c5e6b11 (MD5)
  • description.provenance : Made available in DSpace on 2010-02-22T14:50:23Z (GMT). No. of bitstreams: 1 Liston.UseSimultaneousAnalyses.pdf: 1433269 bytes, checksum: dd98db2b4466b04fcea9f3911c5e6b11 (MD5) Previous issue date: 2008-10

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