Direct and Indirect Effects of Maternal, Paternal, and Offspring Genotypes: Trio-GCTA
- PMID: 33387132
- DOI: 10.1007/s10519-020-10036-6
Direct and Indirect Effects of Maternal, Paternal, and Offspring Genotypes: Trio-GCTA
Abstract
Indirect genetic effects from relatives may result in misleading quantifications of heritability, but can also be of interest in their own right. In this paper we propose Trio-GCTA, a model for separating direct and indirect genetic effects when genome-wide single nucleotide polymorphism data have been collected from parent-offspring trios. The model is applicable to phenotypes obtained from any of the family members. We discuss appropriate parameter interpretations and apply the method to three exemplar phenotypes: offspring birth weight, maternal relationship satisfaction, and paternal body-mass index, using real data from the Norwegian Mother, Father and Child Cohort Study (MoBa).
Keywords: Gene–environment correlation; Indirect genetic effects; MoBa; Trio-GCTA; Within-family.
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