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Population structure in relation to host-plant ecology and Wolbachia infestation in the comma butterfly
Stockholm University, Faculty of Science, Department of Zoology.
Stockholm University, Faculty of Science, Department of Zoology.
Stockholm University, Faculty of Science, Department of Zoology.ORCID iD: 0000-0002-6379-7905
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2011 (English)In: Journal of Evolutionary Biology, ISSN 1010-061X, E-ISSN 1420-9101, Vol. 24, no 10, 2173-2185 p.Article in journal (Refereed) Published
Abstract [en]

Experimental work on Polygonia c-album, a temperate polyphagous butterfly species, has shown that Swedish, Belgian, Norwegian and Estonian females are generalists with respect to host-plant preference, whereas females from UK and Spain are specialized on Urticaceae. Female preference is known to have a strong genetic component. We test whether the specialist and generalist populations form respective genetic clusters using data from mitochondrial sequences and 10 microsatellite loci. Results do not support this hypothesis, suggesting that the specialist and generalist traits have evolved more than once independently. Mitochondrial DNA variation suggests a rapid expansion scenario, with a single widespread haplotype occurring in high frequency, whereas microsatellite data indicate strong differentiation of the Moroccan population. Based on a comparison of polymorphism in the mitochondrial data and sequences from a nuclear gene, we show that the diversity in the former is significantly less than that expected under neutral evolution. Furthermore, we found that almost all butterfly samples were infected with a single strain of Wolbachia, a maternally inherited bacterium. We reason that indirect selection on the mitochondrial genome mediated by a recent sweep of Wolbachia infection has depleted variability in the mitochondrial sequences. We also surmise that P. c-album could have expanded out of a single glacial refugium and colonized Morocco recently.

Place, publisher, year, edition, pages
2011. Vol. 24, no 10, 2173-2185 p.
Keyword [en]
host-plant, phylogeography, Polygonia c-album, single refugium, Wolbachia
National Category
Evolutionary Biology
Research subject
Developmental Biology
Identifiers
URN: urn:nbn:se:su:diva-62917DOI: 10.1111/j.1420-9101.2011.02352.xISI: 000295054500009PubMedID: 21745252OAI: oai:DiVA.org:su-62917DiVA: diva2:445566
Available from: 2011-10-04 Created: 2011-10-04 Last updated: 2017-12-08Bibliographically approved

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