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Related Experiment Videos

Haplotype sharing transmission/disequilibrium tests that allow for genotyping errors.

Qiuying Sha1, Jianping Dong, Renfang Jiang

  • 1Department of Mathematical Sciences, Michigan Technological University, Houghton 49931, USA.

Genetic Epidemiology
|January 22, 2005
PubMed
Summary

New Haplotype Sharing Transmission/Disequilibrium Tests (HS-TDTs) can be made robust to genotyping errors. Merging rare haplotypes controls error inflation, maintaining test power for genetic studies.

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Area of Science:

  • Genetics
  • Statistical Genetics
  • Bioinformatics

Background:

  • Haplotype Sharing Transmission/Disequilibrium Tests (HS-TDTs) are used in genetic association studies.
  • Genotyping errors can significantly impact the reliability of HS-TDT results.
  • Existing methods may be sensitive to genotyping errors and Mendelian inconsistencies.

Purpose of the Study:

  • To develop and evaluate new HS-TDTs that accommodate random genotyping errors.
  • To assess the type I error rate and statistical power of proposed HS-TDTs.
  • To compare the performance of new HS-TDTs against standard HS-TDT and single-marker TDT.

Main Methods:

  • Introduction of novel Haplotype Sharing Transmission/Disequilibrium Tests (HS-TDTs) designed for random genotyping errors.

Related Experiment Videos

  • Evaluation of type I error rates and statistical power through simulations under various scenarios.
  • Comparison of proposed tests with existing HS-TDT and single-marker Transmission Disequilibrium Test (TDT).
  • Investigation of a strategy involving merging rare haplotypes with similar common haplotypes.

    • Main Results:

    • Standard HS-TDT exhibits increased type I error with Mendelian inconsistent data removal or missing genotype treatment.
    • Type I error inflation in HS-TDT escalates with larger sample sizes and higher genotyping error rates.
    • Merging rare haplotypes effectively controls type I error inflation across diverse genotyping error rates.
    • Post-merging, the power of HS-TDT remains comparable to that of the original test.

    Conclusions:

    • A simple haplotype merging strategy can render HS-TDTs robust against genotyping errors.
    • This haplotype merging approach shows potential applicability to other haplotype-based TDTs.
    • The findings offer a practical solution for improving the reliability of genetic association studies using haplotype analysis.