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Genetic differentiation and habitat preference of flowering-time variants within Gymnadenia conopsea
Södertörns högskola, Avdelning Naturvetenskap.ORCID iD: 0000-0002-5013-6462
2003 (English)In: Heredity, ISSN 0018-067X, E-ISSN 1365-2540, Vol. 91, 284-292 p.Article in journal (Refereed) Published
Abstract [en]

Using fast-evolving microsatellites, more slowly evolving ITS markers and performing habitat analyses, we demonstrated a drastic genetic divergence and significant habitat differentiation between early- and late-flowering variants of plants morphologically belonging to Gymnadenia conopsea ssp conopsea. The two phenological variants can either be found in separate or in mixed populations. Information from microsatellite markers and ITS sequences indicated the occurrence of an early historical split between the two flowering-time variants, a split that has been maintained until the present time even within sympatric populations. Early-flowering variants were also far more genetically diverse, had more alleles per microsatellite locus and a wider habitat amplitude than late-flowering variants. As a comparison, we included G. odoratissima in the sequencing study. We found G. odoratissima to be most closely related to the early-flowering type. This indicates a more ancient divergence event between the two flowering-time variants within G. conopsea ssp conopsea than between the two different species G. odoratissima and the early-flowering variant of G. conopsea. Possible explanations to the results arrived at and possible mechanisms maintaining the genetic separation are discussed.

Place, publisher, year, edition, pages
2003. Vol. 91, 284-292 p.
National Category
Natural Sciences
Identifiers
URN: urn:nbn:se:hig:diva-23403DOI: 10.1038/sj.hdy.6800334ISI: 000185076200013PubMedID: 12939630Scopus ID: 2-s2.0-0141454837OAI: oai:DiVA.org:hig-23403DiVA: diva2:1069069
Available from: 2011-02-14 Created: 2017-01-27Bibliographically approved

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