The University of Southampton
University of Southampton Institutional Repository

Calibration of galliform molecular clocks using multiple fossils and genetic partitions

van Tuinen, M. and Dyke, Gareth J. (2004) Calibration of galliform molecular clocks using multiple fossils and genetic partitions Molecular Phylogenetics and Evolution, 30, (1), pp. 74-86. (doi:10.1016/S1055-7903(03)00164-7).

Record type: Article

Abstract

For more than a century, members of the traditional avian order Galliformes (i.e., pheasants, partridges, junglefowl, and relatives) have been among the most intensively studied birds, but still a comprehensive timeframe for their evolutionary history is lacking. Thanks to a number of recent cladistic interpretations for several galliform fossils, candidates now exist that can potentially be used as accurate internal calibrations for molecular clocks. Here, we describe a molecular timescale for Galliformes based on cytochrome b and ND2 using nine mostly internal fossil-based anchorpoints. Beyond application of calibrations spanning the entire evolutionary history of Galliformes, care was taken to investigate the effects of calibration choice, substitution saturation, and rate heterogeneity among lineages on divergence time estimation. Results show broad consistency in time estimation with five out of the nine total calibrations. Our divergence time estimates, based on these anchorpoints, indicate that the early history of Galliformes took place in the Cretaceous, including the origin of the basal-most megapode and perhaps cracid lineages, but that the remaining morphological diversification likely started in the earliest Tertiary. The multi-calibration/multi-genetic partition approach used here highlights the importance of understanding the genetic saturation, variation, and rate constancy spectra for the accurate calculation of divergence times by use of molecular clocks.

Full text not available from this repository.

More information

Published date: 2004
Organisations: Ocean Biochemistry & Ecosystems

Identifiers

Local EPrints ID: 205271
URI: http://eprints.soton.ac.uk/id/eprint/205271
ISSN: 1055-7903
PURE UUID: f5ffdc03-f5d2-46d6-97e8-6888be4a2eaa

Catalogue record

Date deposited: 08 Dec 2011 10:32
Last modified: 18 Jul 2017 11:05

Export record

Altmetrics

Contributors

Author: M. van Tuinen
Author: Gareth J. Dyke

University divisions

Download statistics

Downloads from ePrints over the past year. Other digital versions may also be available to download e.g. from the publisher's website.

View more statistics

Atom RSS 1.0 RSS 2.0

Contact ePrints Soton: eprints@soton.ac.uk

ePrints Soton supports OAI 2.0 with a base URL of http://eprints.soton.ac.uk/cgi/oai2

This repository has been built using EPrints software, developed at the University of Southampton, but available to everyone to use.

We use cookies to ensure that we give you the best experience on our website. If you continue without changing your settings, we will assume that you are happy to receive cookies on the University of Southampton website.

×