Geographic Variation, Hybridization and Evolution in the Bladder Campions, Silene vulgaris and S. uniflora (Caryophyllaceae)

Research output: ThesisDoctoral Thesis (compilation)

Abstract

In the present thesis, I investigated the inter- and intraspecific variation in the Silene vulgaris/uniflora species-complex (the bladder campions). I have focused on the effects of past and present hybridization both on a large scale ? over the whole of Europe ? and on a local scale. Silene vulgaris and S. uniflora are perennial herbs and they are interfertile.

The results from my studies suggest that hybridization between the closely-related species S. vulgaris and S. uniflora has influenced the evolution of both species in Europe. There is evidence for both ancient (predating the most recent postglacial migrations) and recent (local) gene flow between species and populations. The patterns of variation exhibited in allozyme and chloroplast DNA markers indicate considerable mixing of alleles and haplotypes and it is not possible, from the present results alone, to identify the source areas (refugia) from which northern Europe was recolonized during the postglacial period. On the Baltic island of Öland, a strong paternal effect on seed germination and germination time, in combination with differences in habitat preference, appear to constitute a strong barrier against hybridization and gene flow between the weedy S. vulgaris and the endemic S. uniflora ssp. petraea. My results are congruent with the hypothesis that the endemic subspecies S. uniflora ssp. petraea may have evolved as a result of hybridization between S. vulgaris and S. uniflora ssp. uniflora. It is further suggested that S. vulgaris ssp. glareosa and S. vulgaris ssp. prostrata (from S. Europe) may be better regarded as subspecies within S. uniflora, while S. vulgaris ssp. angustifolia should be retained within S. vulgaris.

Details

Authors
  • Eva Månsby
Organisations
Research areas and keywords

Subject classification (UKÄ) – MANDATORY

  • Ecology

Keywords

  • chemotaxonomy. Physiology of nonvascular plants, Systematisk botanik, Växtgenetik, Systematic botany, taxonomy, morphology, phytogeography, Plant genetics, Paternal effects, Seed polymorphism, Ecology, Ekologi, Crossing barriers, cpDNA markers, Genetic variation, Hybridization, Post-glacial migration, Allozymes, Silene vulgaris, Silene uniflora, taxonomi, morfologi, kemotaxonomi. Växters fysiologi (inte kärlväxter).
Original languageEnglish
QualificationDoctor
Awarding Institution
Supervisors/Assistant supervisor
Award date2007 May 24
Publisher
  • Department of Ecology, Lund University
Print ISBNs978-91-7105-256-8
Publication statusPublished - 2007
Publication categoryResearch

Bibliographic note

Defence details Date: 2007-05-24 Time: 10:00 Place: Ekologihuset, blå hallen Sölvegatan 37 Lund External reviewer(s) Name: Wolff, Kirsten Title: Dr. Affiliation: University of Newcastle upon Tyne, UK --- The information about affiliations in this record was updated in December 2015. The record was previously connected to the following departments: Department of Ecology (Closed 2011) (011006010), Plant Ecology and Systematics (Closed 2011) (011004000)