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Allozyme diversity ...
Allozyme diversity and genetic structure of marginal and central populations of Corylus avellana L. (Betulaceae) in Europe
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- Persson, Helena (författare)
- Lund University,Lunds universitet,Biologiska institutionen,Naturvetenskapliga fakulteten,Department of Biology,Faculty of Science
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- Widén, Björn (författare)
- Lund University,Lunds universitet,Biodiversitet,Biologiska institutionen,Naturvetenskapliga fakulteten,Biodiversity,Department of Biology,Faculty of Science
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- Andersson, Stefan (författare)
- Lund University,Lunds universitet,Biodiversitet,Biologiska institutionen,Naturvetenskapliga fakulteten,Biodiversity,Department of Biology,Faculty of Science
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Svensson, Linus (författare)
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(creator_code:org_t)
- Springer Science and Business Media LLC, 2004
- 2004
- Engelska.
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Ingår i: Plant Systematics and Evolution. - : Springer Science and Business Media LLC. - 1615-6110 .- 0378-2697. ; 244:3-4, s. 157-179
- Relaterad länk:
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http://dx.doi.org/10...
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https://lup.lub.lu.s...
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https://doi.org/10.1...
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Abstract
Ämnesord
Stäng
- Corylus avellana L. (hazel, Betulaceae) is a long-lived, widespread shrub in Europe, having its northern range margin in Fennoscandia and a postglacial history involving range-expansion from refugial areas in southern Europe. In this study, we tested for a relationship between marginality and low within-population genetic diversity by assessing patterns of variation at 14 putatively neutral allozyme loci (comprising 43 putative alleles) within and between 40 natural populations of C. avellana along a north-south transect in Europe. Geographically marginal populations (central Sweden) showed lower levels of within-population diversity than populations in more central regions, as indicated by significant negative correlations between latitude and the percentage of polymorphic loci (r(S)=-0.47, P < 0.001), the average number of alleles per locus (r(S)=-0.65, P < 0.001), the expected heterozygosity (r(S)=-0.19, P < 0.05), and the proportion of distinguishable genotypes (r(S)=-0.56, P < 0.001). These patterns, combined with the unusually high between-population component of gene diversity (G(ST)=19.7%) and allelic richness (A(ST)=24%) in the marginal region, can be attributed to historical bottlenecks during the species' postglacial range-expansion, but may also reflect a history of genetic drift in the small, isolated populations occupying the marginal region. Information on the spatial distribution of genotypes provide further support for a role of vegetative reproduction (layering) in the structuring of genetic variation within populations.
Ämnesord
- NATURVETENSKAP -- Biologi -- Ekologi (hsv//swe)
- NATURAL SCIENCES -- Biological Sciences -- Ecology (hsv//eng)
Publikations- och innehållstyp
- art (ämneskategori)
- ref (ämneskategori)
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