Table 1.

Parameters and Notation of Polygenic Model

Design Parameters	Interpretation
n	Training sample size
m	Total number of independent markers in genotyping panel
p 0, p 1	Lower and upper P values to select markers into polygenic score
Genetic model parameters
$R_{GY}^2$	Variance in Y explained by genotypes G; chip heritability of Y
$R_{XY}^2$	Variance in Y explained by environment X
$R_{GX}^2$	Variance in X explained by genotypes G; chip heritability of X
ρ	Genetic (chip) correlation between X and Y
π0	Proportion of markers with no effect on Y