@ARTICLE{TreeBASE2Ref17434,
author = {Eric Schuettpelz and Kathleen M. Pryer},
title = {Reconciling extreme branch length differences: decoupling time and rate through the evolutionary history of filmy ferns.},
year = {2006},
keywords = {},
doi = {10.1080/10635150600755438},
url = {},
pmid = {},
journal = {Systematic Biology},
volume = {55},
number = {3},
pages = {485--502},
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.}
}
Citation for Study 1505
Citation title:
"Reconciling extreme branch length differences: decoupling time and rate through the evolutionary history of filmy ferns.".
This study was previously identified under the legacy study ID S1449
(Status: Published).
Citation
Schuettpelz E., & Pryer K. 2006. Reconciling extreme branch length differences: decoupling time and rate through the evolutionary history of filmy ferns. Systematic Biology, 55(3): 485-502.
Authors
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.
External links
About this resource
- Canonical resource URI:
http://purl.org/phylo/treebase/phylows/study/TB2:S1505
- Other versions:
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- Show BibTeX reference
@ARTICLE{TreeBASE2Ref17434,
author = {Eric Schuettpelz and Kathleen M. Pryer},
title = {Reconciling extreme branch length differences: decoupling time and rate through the evolutionary history of filmy ferns.},
year = {2006},
keywords = {},
doi = {10.1080/10635150600755438},
url = {},
pmid = {},
journal = {Systematic Biology},
volume = {55},
number = {3},
pages = {485--502},
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.}
}
- Show RIS reference
TY - JOUR
ID - 17434
AU - Schuettpelz,Eric
AU - Pryer,Kathleen M.
T1 - Reconciling extreme branch length differences: decoupling time and rate through the evolutionary history of filmy ferns.
PY - 2006
KW -
UR - http://dx.doi.org/10.1080/10635150600755438
N2 - 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.
L3 - 10.1080/10635150600755438
JF - Systematic Biology
VL - 55
IS - 3
SP - 485
EP - 502
ER -