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Evolution of haplotypes at the DRD2 locus

C M Castiglione1, A S Deinard, W C Speed

  • 1Department of Genetics, Yale University School of Medicine, New Haven, CT 06520-8005, USA.

American Journal of Human Genetics
|December 1, 1995
PubMed
Summary
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This study provides the first evolutionary view of dopamine D2 receptor (DRD2) gene haplotypes. Understanding DRD2 haplotype evolution aids in identifying functionally significant genetic variations in human populations.

Area of Science:

  • Neurogenetics
  • Human Evolutionary Genetics

Background:

  • The dopamine D2 receptor (DRD2) is crucial for human brain function.
  • Identifying functionally relevant genetic variations at the DRD2 locus is important for understanding neurological processes.

Purpose of the Study:

  • To present the first evolutionary perspective on DRD2 gene haplotypes.
  • To establish a framework for identifying functionally relevant variation at the DRD2 locus through haplotype evolution analysis.

Main Methods:

  • Analysis of three DRD2 polymorphisms: TaqI RFLPs (A and B) and a (CA)n short tandem repeat.
  • Examination of haplotype evolution and allele frequencies across human populations.

Main Results:

  • Strong and significant linkage disequilibria were observed among the three studied DRD2 polymorphisms.

Related Experiment Videos

  • Common haplotypes for the TaqI RFLPs originated separately from the ancestral haplotype but existed before modern human global dispersal.

    • Conclusions:

    • Knowledge of DRD2 haplotype evolution, population frequencies, and physical relationships of polymorphisms is essential.
    • This understanding facilitates the proper design and interpretation of genetic association studies related to DRD2.