Figure 1.

Model specifications. Figures 1a) and 1b) represent visually the single-locus (M₁(j), M₂(j)) and two-locus (M₃(j, k), M₄(j, k), M₅(j, k)) elementary models, respectively. Figure 1c) represents visually the model obtained by combining elementary models M₂(1) and M₅(2, 3). This combined model is used as an example in the text.