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Inferring local adaptation from QST-FST comparisons: neutral genetic and quantitative trait variation in European populations of great snipe
Uppsala University, Disciplinary Domain of Science and Technology, Biology, Department of Ecology and Evolution, Population and Conservation Biology.
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2007 (English)In: Journal of Evolutionary Biology, ISSN 1010-061X, E-ISSN 1420-9101, Vol. 20, no 4, 1563-1576 p.Article in journal (Refereed) Published
Abstract [en]

We applied a phenotypic QST (PST) vs. FST approach to study spatial variation in selection among great snipe (Gallinago media) populations in two regions of northern Europe. Morphological divergence between regions was high despite low differentiation in selectively neutral genetic markers, whereas populations within regions showed very little neutral divergence and trait differentiation. QST > FST was robust against altering assumptions about the additive genetic proportions of variance components. The homogenizing effect of gene flow (or a short time available for neutral divergence) has apparently been effectively counterbalanced by differential natural selection, although one trait showed some evidence of being under uniform stabilizing selection. Neutral markers can hence be misleading for identifying evolutionary significant units, and adopting the PST–FST approach might therefore be valuable when common garden experiments is not an option. We discuss the statistical difficulties of documenting uniform selection as opposed to divergent selection, and the need for estimating measurement error. Instead of only comparing overall QST and FST values, we advocate the use of partial matrix permutation tests to analyse pairwise QST differences among populations, while statistically controlling for neutral differentiation.

Place, publisher, year, edition, pages
2007. Vol. 20, no 4, 1563-1576 p.
Keyword [en]
conservation units, divergent selection, local adaptation, microsatellite primers, partial Mantel test, Q ST, repeatability as heritability
National Category
Biological Sciences
URN: urn:nbn:se:uu:diva-96529DOI: 10.1111/j.1420-9101.2007.01328.xISI: 000248177600030PubMedID: 17584249OAI: oai:DiVA.org:uu-96529DiVA: diva2:171132
Available from: 2007-11-15 Created: 2007-11-15 Last updated: 2011-04-06Bibliographically approved
In thesis
1. Population Genetic Analyses of Natal Dispersal and Substructure in Three Bird Species
Open this publication in new window or tab >>Population Genetic Analyses of Natal Dispersal and Substructure in Three Bird Species
2007 (English)Doctoral thesis, comprehensive summary (Other academic)
Abstract [en]

Genetic variation within and among populations is a result of past and ongoing processes. Among the most important of such processes are dispersal, habitat fragmentation and selection. This thesis use neutral genetic variation as a tool to investigate these processes in three bird species.

In the Siberian jay, the timing of dispersal is dependent on social dominance among siblings. Mark-recapture data, radio-tracking and genetic variation was used to investigate whether timing of dispersal had an effect on dispersal distance. The results show that early dispersing individuals also disperse longer. In the same species, genetic correlation between neighbours was used to find areas with high production of philopatric individuals, which could be indicative of high habitat quality.

Great snipe populations in northern Europe have a breeding range divided into two regions. A QST-FST approach was applied to study variation in selection between regions. Differentiation between the regions in neutral molecular markers was low, indicating high gene flow, or short time available for neutral divergence. Morphological divergence between the regions was high, and QST > FST, which indicates divergent selection. Thus, neutral genetic markers can be misleading in identifying evolutionary significant units, and the QST-FST approach might be valuable to identify targets for conservation.

Rock ptarmigan, or its ancestors, originated in Beringia, and spread throughout the Holarctic region. Their distribution has subsequently been affected by glaciations, most likely leading to withdrawals and re-colonisations. Neutral genetic variation among five populations around the northern Atlantic was investigated. There was strong genetic structure among the populations, and evidence that Scandinavian rock ptarmigan has been isolated from other populations for considerable time. Rock ptarmigan in Svalbard showed slightly lower genetic variation than others, and comparisons with other studies suggested an eastern colonisation route to Svalbard.

Place, publisher, year, edition, pages
Uppsala: Acta Universitatis Upsaliensis, 2007. 33 p.
Digital Comprehensive Summaries of Uppsala Dissertations from the Faculty of Science and Technology, ISSN 1651-6214 ; 373
Ecology, Perisoreus infaustus, Gallinago media, Lagopus muta, relatedness, philopatry, biased dispersal, phylogeography, microsatellite, mitochondrial DNA, Ekologi
urn:nbn:se:uu:diva-8339 (URN)978-91-554-7045-6 (ISBN)
Public defence
2007-12-06, Zootissalen, Evolutionary Biology Centre, Villavägen 9, Uppsala, 10:00
Available from: 2007-11-15 Created: 2007-11-15Bibliographically approved

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