Patterns of MHC-DRB1 polymorphism in a post-glacial island canid, the Newfoundland red fox (Vulpes vulpes deletrix), suggest balancing selection at species and population timescales.

2b ; site 64 was marginally significant at P < 0.10) were found to be under positive selection in the inclusive data (Fig. 3b ), with particular amino acid variable within species but shared between alleles of different species.

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