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Reconciling extreme branch length differences: decoupling time and rate through the evolutionary history of filmy ferns.

dc.contributor.author Schuettpelz, E
dc.contributor.author Pryer, KM
dc.date.accessioned 2020-12-01T22:57:14Z
dc.date.available 2020-12-01T22:57:14Z
dc.date.issued 2006-06
dc.identifier T411K207R0183W20
dc.identifier.issn 1063-5157
dc.identifier.issn 1076-836X
dc.identifier.uri https://hdl.handle.net/10161/21816
dc.description.abstract The rate of molecular evolution is not constant across the Tree of Life. Characterizing rate discrepancies and evaluating the relative roles of time and rate along branches through the past are both critical to a full understanding of evolutionary history. In this study, we explore the interactions of time and rate in filmy ferns (Hymenophyllaceae), a lineage with extreme branch length differences between the two major clades. We test for the presence of significant rate discrepancies within and between these clades, and we separate time and rate across the filmy fern phylogeny to simultaneously yield an evolutionary time scale of filmy fern diversification and reconstructions of ancestral rates of molecular evolution. Our results indicate that the branch length disparity observed between the major lineages of filmy ferns is indeed due to a significant difference in molecular evolutionary rate. The estimation of divergence times reveals that the timing of crown group diversification was not concurrent for the two lineages, and the reconstruction of ancestral rates of molecular evolution points to a substantial rate deceleration in one of the clades. Further analysis suggests that this may be due to a genome-wide deceleration in the rate of nucleotide substitution.
dc.language eng
dc.publisher Society of Systematic Zoology
dc.relation.ispartof Systematic biology
dc.relation.isversionof 10.1080/10635150600755438
dc.subject Plastids
dc.subject Ferns
dc.subject Ribulose-Bisphosphate Carboxylase
dc.subject Evolution, Molecular
dc.subject Time Factors
dc.subject Genetic Speciation
dc.subject Genetic Variation
dc.title Reconciling extreme branch length differences: decoupling time and rate through the evolutionary history of filmy ferns.
dc.type Journal article
duke.contributor.id Pryer, KM|0079353
dc.date.updated 2020-12-01T22:57:05Z
pubs.begin-page 485
pubs.end-page 502
pubs.issue 3
pubs.organisational-group Trinity College of Arts & Sciences
pubs.organisational-group Biology
pubs.organisational-group Duke Science & Society
pubs.organisational-group Duke
pubs.organisational-group Initiatives
pubs.organisational-group Institutes and Provost's Academic Units
pubs.publication-status Published
pubs.volume 55
duke.contributor.orcid Pryer, KM|0000-0002-9776-6736


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