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  3. A Multi-ancestry Genetic Reference For The Quebec Population.
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  3. A Multi-ancestry Genetic Reference For The Quebec Population.

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A multi-ancestry genetic reference for the Quebec population.

Peyton McClelland1, Georgette Femerling2, Rose Laflamme3,4

  • 1Department of Human Genetics, McGill CERC Program in Genomic Medicine, Victor Phillip Dahdaleh Institute of Genomic Medicine at McGill University, Montreal, QC, Canada.

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|February 3, 2026

View abstract on PubMed

Summary
This summary is machine-generated.

This study analyzes genetic variation in 29,337 Quebec residents, revealing insights into population demographics and disease-related genetic variants. A new imputation panel improved genome-wide association study (GWAS) results for 42 traits.

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Area of Science:

  • Population Genetics
  • Genomics
  • Bioinformatics

Background:

  • International genetic studies often overlook environmental and social factors.
  • Quebec has a history of genetic research, particularly on founder populations and Mendelian diseases.
  • Understanding genetic variation in diverse populations is crucial for interpreting health data.

Purpose of the Study:

  • To analyze genome-wide genetic variation in Quebec residents from the CARTaGENE cohort.
  • To gain insights into Quebec's demography and interpret clinically relevant genetic variants.
  • To validate a novel imputation panel for genetic analysis.

Main Methods:

  • Genome-wide genotyping of 29,337 Quebec residents.
  • Whole-genome sequencing of 2,173 participants from Canada, Haiti, and Morocco.
  • Development and validation of a custom imputation panel using phased whole-genome sequence data.
  • Genome-wide association studies (GWAS) on 42 clinically relevant traits.

    • Main Results:

    • Analysis of genetic variation provided insights into Quebec's demography.
    • The custom imputation panel increased associated loci by ~7% in GWAS compared to the TOPMed panel.
    • Allele frequency and GWAS results are publicly available.

    Conclusions:

    • The study provides valuable genetic data for Quebec's multi-ancestry population.
    • The developed imputation panel enhances the power of GWAS for identifying genetic associations.
    • Publicly accessible genetic and phenotypic data support global research efforts.