Genetic Diversity in Arctic Lemmings
Fredga K, Fedorov V, Jarrell G, Jonsson L. 1999. Genetic Diversity in Arctic Lemmings. Ambio. 28(3):261-269
The Tundra Ecology -94 expedition offered unique opportunities to study genetic diversity in lemmings along 6000 km of the Arctic coast of Eurasia. Comparisons were made within and among populations, among geographic regions, and between species. One aim of our study was to contribute with molecular data to solve taxonomic problems present in true lemmings (Lemmus). MtDNA studies made it possible to clarify the phylogenetic relationships among various populations, and thus it was logical to divide the present species L. sibiricus into two, L. sibiricus and L. bungei. Another aim was to describe the chromosome races in collared lemmings (Dicrostonyx) and explain their origin. Four chromosome races and their distribution along the coast were established in D. torquatus. The races are mainly characterized by a sequence of translocations between sex chromosomes and autosomes. Our studies confirmed that the collared lemmings on Wrangel Island belong to another species, D. groenlandicus, and it was proven that the colonization history of Wrangel Island was completely different for Lemmus and Dicrostonyx.
- Type
- Journal Article
- Authors
- Fredga, Karl; Fedorov, Vadim; Jarrell, Gordon; Jonsson, Lars
- Units
- ARCN , BELA , CAKR , GAAR , KOVA , NOAT
- Keywords
- Arctic, dicrostonyx-torquatus, Evolution, Females, Lemmus, Speciation