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