Partitioning of the total phenotypic (P) and the genetic (G) variance explained by the quantitative trait loci mapped by SIM at a 20% genome-wide significance level in the F₂ generation of a red junglefowl × White Leghorn intercross. Vr, residual variance; Vg, genetic variance; Vb, variance explained by batch effects; Vs, variance explained by sex effects; Vdd, dominance-by-dominance genetic interaction variance; Vad, additive-by-dominance and dominance-by-additive genetic interaction variance; Vaa, additive-by-additive genetic interaction variance; Vd, dominance genetic variance; Va, additive genetic variance. Abbreviations for traits are explained in the legend of Figure 4.