Table 2.

Heritability of traits simulated under additive or non-additive gene action

Gene action	Number of QTN	$h_a^2$	$h_d^2$	$h_I^2$	$H_{\mathbf{B}}^2$
Purely additive	100	0.30	0.00	0.00	0.30
	1000	0.30	0.00	0.00	0.30
Non-additive	100	0.10	0.10	0.50	0.70
	1000	0.02	0.02	0.68	0.70

Non-additive: mixture of additive, dominance and epistatic effects

$h_a^2$: additive heritability; $h_d^2$: dominance heritability; $h_I^2$: proportion of epistatic variation related to phenotypic variation; $H_B^2$: broad sense heritability