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Population structure of Barra (Outer Hebrides)
Author(s) -
MORTON N. E.,
SMITH C.,
HILL R.,
FRACKIEWICZ A.,
LAW P.,
YEE S.
Publication year - 1976
Publication title -
annals of human genetics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.537
H-Index - 77
eISSN - 1469-1809
pISSN - 0003-4800
DOI - 10.1111/j.1469-1809.1976.tb00139.x
Subject(s) - inbreeding , kinship , population , geography , demography , population structure , genealogy , demographic history , census , population size , biology , evolutionary biology , history , anthropology , genetic variation , sociology
Summary Historical demography, surname concordance (isonymy), migration, and genealogy give a consistent description of population structure. The census size has averaged about 1400 over the last five centuries. Conjoined with an effective migration rate of 0.05 per generation as estimated by three different methods, this gives an evolutionary size of 638 , random kinship of 0–008 and inbreeding of 0.007 relative to the rest of Britain. The population structure of Barra is similar to other British isolates in the recent past, but an order of magnitude less inbred than slash‐and‐burn agriculturalists and Pacific Islanders. Some consequences for rare genes and polymorphisms are discussed.