Genetic distance between geographically isolated Pedicularis dasyantha populations in Spitsbergen, Svalbard Archipelago, Norway. Evidence of glacial survival ?

Geographically isolated populations of Pedicularis dasyantha, an arctic herbaceous plant on Svalbard, show strong phenotypic variation suggestion routes of migration from sites of glacial survival. Electrophoretic isozyme analyses of 6-phosphogluconate dehydrogenase (6-PGD) revealed significant variation in allele frequencies between the isolated populations. The pattern of gene-pool variation and the important evolutionary development of self-compatibility in an otherwise self-incompatible genus suggests survival of the species during an extended unfavourable period in Svalbard