Table 1 Kinship coefficients for different relative pairs
From: An unbiased kinship estimation method for genetic data analysis
Relationship | \(\phi _{ab}\) | \((k_{0ab},k_{1ab},k_{2ab})\) | Inference criteria |
|---|---|---|---|
MZ twins | 0.5 | (0, 0, 1) | \(>\frac{1}{2^{3/2}}\) |
Parent-offspring | 0.25 | (0, 1, 0) | \((\frac{1}{2^{5/2}},\frac{1}{2^{3/2}})\) |
Full sibs | 0.25 | (0.25, 0.5, 0.25) | \((\frac{1}{2^{5/2}},\frac{1}{2^{3/2}})\) |
Half sibs | 0.125 | (0.5, 0.5, 0) | \((\frac{1}{2^{7/2}},\frac{1}{2^{5/2}})\) |
Uncle-niece | 0.125 | (0.5, 0.5, 0) | \((\frac{1}{2^{7/2}},\frac{1}{2^{5/2}})\) |
First cousin | 0.0625 | (0.75, 0.25, 0) | \((\frac{1}{2^{9/2}},\frac{1}{2^{7/2}})\) |
Unrelated | 0 | (1, 0, 0) | \(<\frac{1}{2^{9/2}}\) |