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[Linkage disequilibrium]

N Feingold

    Journal De Genetique Humaine
    |June 1, 1980
    PubMed
    Summary
    This summary is machine-generated.

    Persistent linkage disequilibrium in the Human Leukocyte Antigen (HLA) system, unlike temporary associations, may indicate selection or migration. Such genetic associations can help identify disease susceptibility genes.

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    Area of Science:

    • Population genetics
    • Immunogenetics
    • Molecular biology

    Context:

    • Linkage disequilibrium (LD) describes gene associations, typically transient due to recombination.
    • The Human Leukocyte Antigen (HLA) system exhibits persistent LD, suggesting factors beyond simple recombination.
    • Phenotypic correlations arising from LD can be influenced by pleiotropy, epistasis, or population structure.

    Purpose:

    • To explore the reasons behind persistent linkage disequilibrium in the HLA system.
    • To understand the implications of LD and phenotypic correlations in population and medical genetics.
    • To highlight the utility of studying HLA associations for identifying disease-related genes.

    Summary:

    • Persistent linkage disequilibrium in the HLA system, unlike temporary associations, may be driven by selection or migration.

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  • LD can lead to phenotypic correlations, which in population studies might indicate migration or population substructure.
  • Investigating HLA associations is crucial for pinpointing genes linked to disease susceptibility, particularly those near B or D alleles.

    • Impact:

    • Provides insights into the evolutionary forces shaping the HLA complex.
    • Enhances understanding of genetic architecture underlying complex diseases.
    • Facilitates the identification of novel genetic markers for disease risk assessment.