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Within-Family GWAS

Definition
AI-generated

Within-family GWAS estimates genetic effects using variation segregating among siblings (or other close relatives), comparing genotypes between siblings who differ in phenotype.

Topics
GWAS
Synonyms
Sibship-based GWAS
Related
Cryptic Relatedness Genetic Relationship Matrix (GRM) Genome-Wide Association Study (GWAS)

Why it matters in GWAS

Comparing within- versus between-family estimates helps separate direct genetic effects on the individual from population structure and from “genetic nurture” pathways; it is increasingly discussed for social and behavioral traits and for causal interpretation.

Example usage

"A replication analysis checks whether assumptions tied to Within-Family GWAS remain stable across cohorts."

Cryptic Relatedness Genetic Relationship Matrix (GRM) Genome-Wide Association Study (GWAS) Kinship Coefficient Mendelian Randomization (MR) Pedigree Population Stratification Relatedness
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References

  • Howe LJ, et al. (2022). Within-sibship genome-wide association analyses decrease bias in estimates of direct genetic effects. Nat Genet.
  • Kong A, et al. (2018). The nature of nurture: effects of parental genotypes. Science.
  • Uffelmann E, et al. (2021). Genome-wide association studies. Nat Rev Methods Primers. https://doi.org/10.1038/s43586-021-00056-9
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