Molecular data resolve placement of the Olympic marmot and estimate dates of trans-Beringian interchange

摘要: Abstract We reinvestigated the phylogeny of all 15 species Marmota to resolve a conflict between 2 published analyses, one by Kruckenhauser et al. and another Steppan al., regarding Olympic marmot (M. olympus) improve resolution in genus. acquired fresh samples M. olympus, combined available data on mitochondrial DNA (cytochrome b [Cytb] ND3/ND4), new sequences for ND3/ND4, 2,000 base pairs (bp) nuclear RAG1 gene. All analyses indicate that olympus is much older, rather than more recent, offshoot widespread hoary caligata) or Vancouver Island vancouverensis). The some results are largely congruent, but differs several points, including: subgenus appears paraphyletic Petromarmota, with reciprocally monophyletic Palearctic Nearctic clades; long-tailed caudata) Menzbier's menzbieri) not sister species, suggesting introgre...