Figure 1.

Empirical semivariogram of the QTL-MAS 2010 dataset and theoretical models (Quadratic, Linear, Gaussian and Exponential) fitted by weighted least squares. Genotypic covariance models of the form Γ = {f(d_ii′)}, where d is the Euclidean distance computed from marker data and θ is a parameter, are as follows: Quadratic: f(d) = 1 – θd²; Linear: f(d) = 1 – θd; Gaussian: f(d) = exp(-d²/θ²); Exponential: f(d) = exp(-d/θ).