Immigrant inviability produces a strong barrier to gene flow between parapatric ecotypes of Senecio lautus

Richards, Thomas J. and Ortiz-Barrientos, Daniel (2016) Immigrant inviability produces a strong barrier to gene flow between parapatric ecotypes of Senecio lautus. Evolution, 70 6: 1239-1248. doi:10.1111/evo.12936


Author Richards, Thomas J.
Ortiz-Barrientos, Daniel
Title Immigrant inviability produces a strong barrier to gene flow between parapatric ecotypes of Senecio lautus
Formatted title
Immigrant inviability produces a strong barrier to gene flow between parapatric ecotypes of Senecio lautus
Journal name Evolution   Check publisher's open access policy
ISSN 0014-3820
1558-5646
Publication date 2016-06
Year available 2016
Sub-type Article (original research)
DOI 10.1111/evo.12936
Open Access Status Not Open Access
Volume 70
Issue 6
Start page 1239
End page 1248
Total pages 10
Place of publication Chichester, West Sussex, United Kingdom
Publisher Wiley-Blackwell Publishing
Collection year 2017
Language eng
Formatted abstract
Speciation proceeds when gene exchange is prevented between populations. Determining the different barriers preventing gene flow can therefore give insights into the factors driving and maintaining species boundaries. These reproductive barriers may result from intrinsic genetic incompatibilities between populations, from extrinsic environmental differences between populations, or a combination of both mechanisms. We investigated the potential barriers to gene exchange between three adjacent ecotypes of an Australian wildflower to determine the strength of individual barriers and the degree of overall isolation between populations. We found almost complete isolation between the three populations mainly due to premating extrinsic barriers. Intrinsic genetic barriers were weak and variable among populations. There were asymmetries in some intrinsic barriers due to the origin of cytoplasm in hybrids. Overall, these results suggest that reproductive isolation between these three populations is almost complete despite the absence of geographic barriers, and that the main drivers of this isolation are ecologically based, consistent with the mechanisms underlying ecological speciation.
Keyword Ecological speciation
Local adaptation
parapatry
postzygotic isolation
Reproducttive isolation
Reciprocal transplant
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: HERDC Pre-Audit
School of Biological Sciences Publications
 
Versions
Version Filter Type
Citation counts: TR Web of Science Citation Count  Cited 0 times in Thomson Reuters Web of Science Article
Scopus Citation Count Cited 2 times in Scopus Article | Citations
Google Scholar Search Google Scholar
Created: Mon, 18 Jul 2016, 15:45:15 EST by Dr Daniel Ortiz-barrientos on behalf of School of Biological Sciences