Abstract
AbstractThe population genetic structure of wood lemmings (Myopus schisticolor) from Scandinavia, Finland and western Siberia was examined by restriction fragment length polymorphism of mitochondrial DNA (mtDNA) in 45 individuals from six localities. The 12 observed mtDNA haplotypes demonstrated a distinct phylogeographic pattern, suggesting that the postglacial colonization of Scandinavia by wood lemmings occurred from north‐east. However, a very low level of haplotype and nucleotide diversity and a lack of geographical structure were found within Scandinavia. The limited mtDNA diversity in the Scandinavian populations probably reflects recent divergence in situ after colonization by a limited number of founders. Allozyme data support this scenario.
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