Category	Value ($a_{CR}$)	Value (${\mathcal{D}}_{KB}$)
Pseudo-under-recessivity	$a\ll -1.0$	$\mathcal{D}\gg \mathrm{1.0}$
Recessivity	$a=-1.0$	$\mathcal{D}=\mathrm{1.0}$
No dominance (additivity)	$a=0.0$	$\mathcal{D}=\mathrm{0.5}$
Dominance	$a=1.0$	$\mathcal{D}=\mathrm{0.0}$
Pseudo-overdominance	$a\gg 1.0$	$\mathcal{D}\ll \mathrm{0.0}$

¹For our purposes, rather than compute estimates of the average or aggregate dominance contribution based on the variance components, which is captured to some extent in the Variance Projection analysis, we use the posterior predictive estimates of phenotypes within the inbred and hybrid groups to generate a posterior distribution of the degree of dominance parameter, $a_{CR}\text{,}$ for all pairings of different inbred parents in the 6 × 6 diallel (n = 15 categories).

²Note that a is a measure of dominance; it equals zero when dominance is absent and increases in magnitude as y_Bb deviates from the midpoint between y_BB and y_bb.

³Therefore if the estimate of a is significantly greater than one, it can be concluded that one or more a is greater than one, i.e., that there is overdominance of genes at one or more locus.