AGB 121: Principles of Animal Genetics and Population Genetics (2+1)

Dominace deviation

DOMINANCE DEVIATION

• When a single locus only is under consideration, the difference between the genotypic value (G) and the breeding value (A) of particular genotype is known as dominance deviation. (Deviations of the genotypic value from the breeding value are dominance deviations).
• The genetic effects (G) can be further partitioned, ignoring interactions among loci,

G = A + D

Where

• A - Additive effects ( sum of the breeding values) and
• D - Dominance deviations

• The dominance deviation arises from the property of dominance between alleles at the same locus .