eMonocot Cyperaceae

an authoritative resource for Cyperaceae data worldwide, integrating global and regional perspectives

Low allozyme variation in Carex loliacea (Cyperaceae), a declining woodland sedge

Publication Type:Journal Article
Year of Publication:2007
Authors:Kull, T., Oia T.
Journal:Annales Botanici Fennici
Volume:44
Pagination:267-275
Keywords:allozymes, carex loliacea, CHROMOSOME-NUMBERS, complex cyperaceae, conservation, decreasing distribution, diversity, FRAGMENTATION, genetic-variation, geographical, habitat, history, hybridization, INTERSPECIFIC DIFFERENTIATION, Plants, variation
Abstract:

The genetic diversity within and among 17 populations of Carex loliacea from Estonia, Finland, Sweden, Poland and southcentral Alaska was evaluated by isozyme analysis. An extremely low allozyme variation was found. Fourteen populations were monomorphic at all 18 isozymes. Only three Estonian populations studied showed limited variation of one isozyme, malate dehydrogenase MDH-A, with two allozymes. Almost all allozyme variation was observed as homozygous variants. Of 400 individuals analyzed, only six revealed heterozygous morphs. The high level of inbreeding (F = 0.91) clearly shows that C. loliacea is a predominantly selfing species. The variation of MDH-A showed some geographic distribution. Finnish, Swedish and Alaskan populations form one group, and Polish and Estonian populations form another. The pattern of intraspecific geographic differentiation may reflect the postglacial recolonization routes.

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