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Mol Ecol Resour. 2009 Mar;9(2):551-4. doi: 10.1111/j.1755-0998.2008.02364.x. Epub 2009 Jan 31.

Development of nine new microsatellite loci for the American beaver, Castor canadensis (Rodentia: Castoridae), and cross-species amplification in the European beaver, Castor fiber.

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School of Natural. Resources, University of Arizona, Biosciences East, Tucson, AZ 85721, USA Wildlife Genetics Laboratory, National Wildlife Research Center, Wildlife Services, USDA, Fort Collins, CO 80521, USA Department of Zoology, Charles University in Prague, Faculty of Science, Vinicna 7, CZ 128 44 Praha 2, Czech Republic USGS/SBSC/Sonoran Desert Research Station, University of Arizona, Tucson AZ 85721, USA.


We developed nine new nuclear dinucleotide microsatellite loci for Castor canadensis. All loci were polymorphic, except for one. The number of alleles ranged from two to four and from five to 12 in populations from Arizona and Wisconsin, respectively. Average heterozygosity ranged from 0.13 to 0.86 per locus. Since cross-species amplification in Castor fiber was successful only in four loci, we tested also nine recently published C. canadensis loci in the Eurasian species. Eight of the published loci amplified; however, three were monomorphic. The number of alleles was lower in C. fiber than in C. canadensis at all loci tested.

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