Skip navigation
Skip navigation

Unraveling the evolutionary history of the nematode Pristionchus pacificus: From lineage diversification to island colonization

McGaughran, Angela; Morgan, Katy; Sommer, Ralf J.

Description

The hermaphroditic nematode Pristionchus pacificus is a model organism with a range of fully developed genetic tools. The species is globally widespread and highly diverse genetically, consisting of four major independent lineages (lineages A, B, C, and D). Despite its young age (∼2.1 Ma), volcanic La Réunion Island harbors all four lineages. Ecological and population genetic research studies suggest that this diversity is due to repeated independent island colonizations by P. pacificus. Here,...[Show more]

dc.contributor.authorMcGaughran, Angela
dc.contributor.authorMorgan, Katy
dc.contributor.authorSommer, Ralf J.
dc.date.accessioned2018-11-29T22:56:58Z
dc.date.available2018-11-29T22:56:58Z
dc.identifier.issn2045-7758
dc.identifier.urihttp://hdl.handle.net/1885/153692
dc.description.abstractThe hermaphroditic nematode Pristionchus pacificus is a model organism with a range of fully developed genetic tools. The species is globally widespread and highly diverse genetically, consisting of four major independent lineages (lineages A, B, C, and D). Despite its young age (∼2.1 Ma), volcanic La Réunion Island harbors all four lineages. Ecological and population genetic research studies suggest that this diversity is due to repeated independent island colonizations by P. pacificus. Here, we use model-based statistical methods to rigorously test hypotheses regarding the evolutionary history of P. pacificus. First, we employ divergence analyses to date diversification events among the four “world” lineages. Next, we examine demographic properties of a subset of four populations (“a”, “b”, “c”, and “d”), present on La Réunion Island. Finally, we use the results of the divergence and demographic analyses to inform a modeling-based approximate Bayesian computation (ABC) approach, where we test hypotheses about the order and timing of establishment of the Réunion populations. Our dating estimates place the recent common ancestor of P. pacificus lineages at nearly 500,000 generations past. Our demographic analysis supports recent (<150,000 generations) spatial expansion for the island populations, and our ABC approach supports c>a>b>d as the most likely colonization order of the island populations. Collectively, our study comprehensively improves previous inferences about the evolutionary history of P. pacificus.
dc.format.mimetypeapplication/pdf
dc.publisherJohn Wiley & Sons Inc
dc.sourceEcology and Evolution
dc.subjectKeywords: Approximate Bayesian Computation; Colonization; Modeling; Nematode; Population genetics; Pristionchus pacificus
dc.titleUnraveling the evolutionary history of the nematode Pristionchus pacificus: From lineage diversification to island colonization
dc.typeJournal article
local.description.notesImported from ARIES
local.identifier.citationvolume3
dc.date.issued2013
local.identifier.absfor060302 - Biogeography and Phylogeography
local.identifier.ariespublicationU3488905xPUB16737
local.type.statusPublished Version
local.contributor.affiliationMcGaughran, Angela, College of Science, ANU
local.contributor.affiliationMorgan, Katy, Max Planck Institute for Developmental Biology
local.contributor.affiliationSommer, Ralf J., Max Planck Institute for Developmental Biology
local.bibliographicCitation.issue3
local.bibliographicCitation.startpage667
local.bibliographicCitation.lastpage675
local.identifier.doi10.1002/ece3.495
local.identifier.absseo970106 - Expanding Knowledge in the Biological Sciences
dc.date.updated2018-11-29T08:14:50Z
local.identifier.scopusID2-s2.0-84876684114
local.identifier.thomsonID000316124100018
dcterms.accessRightsOpen Access
CollectionsANU Research Publications

Download

File Description SizeFormat Image
01_McGaughran_Unraveling_the_evolutionary_2013.pdf1.22 MBAdobe PDFThumbnail


Items in Open Research are protected by copyright, with all rights reserved, unless otherwise indicated.

Updated:  19 May 2020/ Responsible Officer:  University Librarian/ Page Contact:  Library Systems & Web Coordinator