When both additive and non-additive genetettcets are important in the expression of a trait, the most appropriate solution scheme is

When both additive and non-additive genetettcets are important in the expression of a trait, the most appropriate solution scheme is the Pure line.
Additive genetic influence (A) describes the effect of multiple genes that exert influence in a linear or additive fashion. Non-additive genetic factors (NA), by contrast, describe the interactive effects of different alleles and include genetic dominance and epistasis.
A pure line means those breeds of organisms that have been generated through repeated self-fertilization and have become homozygous for a particular trait.