Nature of epistasis | Relationship among parameters^{a} | F_{2} ratio |
---|---|---|
Complementary | A_{1} = A_{2} = D_{1} = D_{2} = AA_{12} = AD_{12} = AD_{21} = DD_{12} | 9:7 |
Duplicate | A_{1} = A_{2} = D_{1} = D_{2} = −AA_{12} = −AD_{12} = −AD_{21} = −DD_{12} | 15:1 |
Dominant | A_{1} = D_{1} ≠ A_{2}, A_{2} = D_{2} = −AA_{12} = −AD_{12} = −AD_{21} = −DD_{12} | 12:3:1 |
Recessive | A_{1} = D_{1} ≠ A_{2}, A_{2} = D_{2} = AA_{12} = AD_{12} = AD_{21} = DD_{12} | 9:3:4 |
Inhibitory | A_{1} = −A_{2} = D_{1} = −D_{2} = −AA_{12} = −AD_{12} = −AD_{21} = −DD_{12} | 13:3 |
↵^{a} Ai is the additive effect at locus 1; A_{2} is the additive effect at locus 2; D_{1} is the dominance effect at locus 1; D_{2} is the dominance effect at locus 2; AA_{12} is the interaction between A_{1} and A_{2}; AD_{12} is the interaction between A_{1} and D_{2}; AD_{21} is the interaction between A_{2} and D_{1}; and DD_{12} is the interaction between D_{1} and D_{2}.