CORRESPONDENCE ANALYSIS OF HLA GENE FREQUENCY DATA FROM 124 POPULATION SAMPLES

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  • 1 January 1977
    • journal article
    • research article
    • Vol. 29  (1) , 60-75
Abstract
Correspondence analysis, a variant of principal components analysis, is used to interpret and compare gene frequencies of the HL-A system for 124 samples from different populations studied in the Fifth and Sixth International Histocompatibility Workshops. The major advantage of this analysis is that populations and HL-A genes are represented simultaneously with respect to the same axes in multidimensional space. This permits the visual interpretation of genetic differences between populations, the relative participation of each gene in the dispersion, and the correspondence between populations and genes. A clear separation of ethnic groups in the world is obtained. Furthermore, within Europe the separation of samples from different countries is concordant with their geographical distances. The HL-A system appears sufficiently polymorphic to define a population by its gene frequencies.

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