genotypic variance

This is not the only approach to defining and partitioning genotypic variances.

Refinements to the partitioning of the inbred genotypic variance.

His residual genotypic variance (called simply "residual" by Fisher) represented assortment which did not lead to phenotypic change.

The mating-system assumed in deriving these genotypic variances is panmixia : which implies random fertilisation with uniform distribution of gametes in a very large population (theoretically, infinity).