Suchergebnisse

SummaryInbreeding coefficients were calculated from data on spouse relationships in a sample of 4833 marriages comprising 345 from three Nilotic tribes, 302 from two indigenous Negroid tribes, and 4186 from several Arab and other tribes. The average inbreeding coefficients were 0·0081 to 0·0145 in Nilotic tribes, 0·0251 to 0·0269 in indigenous Negroids, and 0·0286 to 0·0430 in Arab tribes. First cousin unions constituted about half of all the consanguineous marriages and the pattern of first cousin marriages was similar in all three groups. The inbreeding coefficient for the entire sample was 0·0317.