Table 2. Relationship between genotypic-correlation coefficients and modes of IBD.

On the right are the nine identity modes relating two individuals. Alleles a and b belong to individual X, and alleles c and d belong to individual Y. Alleles that are IBD are connected by solid lines. On the left, these nine modes can be used to obtain the coefficients of coancestry (Θ), inbreeding (f), and fraternity (Δ), along with the coefficients that we introduce: the inbred relatedness (γ), identity (δ), and zygosity (ρ).