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Genetic variation and clonal diversity in four clonal sedges (Carex) along the Arctic coast of Eurasia
Stenström, Anna
Jonsson, Olle
Jónsdóttir, Ingibjörg S.
Fagerström, Torbjörn
Augner, Magnus
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Responsible organisation
Swedish Polar Research Secretariat
2001 (English)
In:
Molecular Ecology, Vol. 89, no 9, p. 1410-1421
Article in journal (Refereed)
Abstract [en]
We studied the structure of genetic variation (at both ramet- and genet-level) and clonal diversity within and among populations in the four closely related arctic clonal sedges Carex bigelowii, C. ensifolia, C. lugens and C. stans by use of allozyme markers. Compared to other sedges and arctic plants, the studied taxa all had high levels of genetic variation, both within populations and taxa. These taxa contained most of the total gene diversity (HT) within populations and a small part of the diversity among populations (GST ranged 0.05–0.43). Carex bigelowii had genetic variation (HS = 0.173, mean for populations) at a comparable level to other outbreeding arctic plants and to other widespread, rhizomatous and mainly outbreeding Carex species. In contrast, C. ensifolia (HS = 0.335), C. lugens (HS = 0.339) and C. stans (HS = 0.294) had within-population variations that were higher than in most other studied Carex species and for arctic plants in general. Genetic variation was not related to any tested environmental variable, but it was lower in areas deglaciated only 10 000 years bp compared to areas deglaciated 60 000 years bp or not glaciated at all during the Weichselian. All the populations were multiclonal, except for two populations of C. stans that were monoclonal. In contrast to genetic variation, clonal diversity decreased with latitude and did not differ between areas with different times of deglaciation. In accordance with previous studies, C. bigelowii and C. lugens were found to be outbreeding, while C. ensifolia and C. stans had mixed mating systems.
Place, publisher, year, edition, pages
2001, 28 JUN 2008. Vol. 89, no 9, p. 1410-1421
Keywords [en]
SWEDARCTIC 1994, Tundra Ecology-94, Swedish-Russian Tundra Ecology-expedition-94, glaciation, Carex, Arctic, Carex, clonal diversity, enzyme electrophoresis, genetic variation, glacial refugia, latitude
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URN:
urn:nbn:se:polar:diva-1543
DOI:
10.1046/j.1365-294X.2001.01238.x
OAI: oai:DiVA.org:polar-1543
DiVA, id:
diva2:569681
Note
Source: Polardok by Swedish Polar Research Secretariat
Available from:
2012-11-15
Created:
2012-11-15
Last updated:
2012-11-15
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modern-language-association-8th-edition
vancouver
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ieee
modern-language-association-8th-edition
vancouver
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