dc.contributor.author |
McCormack, JE |
en |
dc.contributor.author |
Heled, Yosef |
en |
dc.contributor.author |
Delaney, KS |
en |
dc.contributor.author |
Peterson, AT |
en |
dc.contributor.author |
Knowles, LL |
en |
dc.date.accessioned |
2012-05-15T03:26:01Z |
en |
dc.date.issued |
2011 |
en |
dc.identifier.citation |
EVOLUTION 65(1):184-202 01 Jan 2011 |
en |
dc.identifier.issn |
0014-3820 |
en |
dc.identifier.uri |
http://hdl.handle.net/2292/17992 |
en |
dc.description.abstract |
Estimates of the timing of divergence are central to testing the underlying causes of speciation. Relaxed molecular clocks and fossil calibration have improved these estimates; however, these advances are implemented in the context of gene trees, which can overestimate divergence times. Here we couple recent innovations for dating speciation events with the analytical power of species trees, where multilocus data are considered in a coalescent context. Divergence times are estimated in the bird genus Aphelocoma to test whether speciation in these jays coincided with mountain uplift or glacial cycles. Gene trees and species trees show general agreement that diversification began in the Miocene amid mountain uplift. However, dates from the multilocus species tree are more recent, occurring predominately in the Pleistocene, consistent with theory that divergence times can be significantly overestimated with gene-tree based approaches that do not correct for genetic divergence that predates speciation. In addition to coalescent stochasticity, Haldane's rule could account for some differences in timing estimates between mitochondrial DNA and nuclear genes. By incorporating a fossil calibration applied to the species tree, in addition to the process of gene lineage coalescence, the present approach provides a more biologically realistic framework for dating speciation events, and hence for testing the links between diversification and specific biogeographic and geologic events. |
en |
dc.publisher |
Wiley Online Library |
en |
dc.relation.ispartofseries |
Evolution |
en |
dc.rights |
Items in ResearchSpace are protected by copyright, with all rights reserved, unless otherwise indicated. Previously published items are made available in accordance with the copyright policy of the publisher. Details obtained from http://www.sherpa.ac.uk/romeo/issn/0014-3820/ |
en |
dc.rights.uri |
https://researchspace.auckland.ac.nz/docs/uoa-docs/rights.htm |
en |
dc.title |
Calibrating divergence times on species trees versus gene trees: implications for speciation history of Aphelocoma jays |
en |
dc.type |
Journal Article |
en |
dc.identifier.doi |
10.1111/j.1558-5646.2010.01097.x |
en |
pubs.issue |
1 |
en |
pubs.begin-page |
184 |
en |
pubs.volume |
65 |
en |
dc.rights.holder |
Copyright: 2010 The Author(s). Evolution; 2010 The Society for the Study of Evolution |
en |
dc.identifier.pmid |
20681982 |
en |
pubs.end-page |
202 |
en |
dc.rights.accessrights |
http://purl.org/eprint/accessRights/RestrictedAccess |
en |
pubs.subtype |
Article |
en |
pubs.elements-id |
242129 |
en |
pubs.record-created-at-source-date |
2011-11-21 |
en |
pubs.dimensions-id |
20681982 |
en |