Inbreeding levels in Orkney islanders

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Abstract
Summary: From pedigree analysis of a sample of 214 Orcadians, inbreeding levels are high by comparison with limited dada for Britain. The mean inbreeding coefficient is 0.001834, with a zero baseline taken as 1750. There appears little secular change for subject born over the period 1879–1940. Local variations occur within Orkney, and possible reasons for these are suggested.