Figure 1From: Pre-selection of markers for genomic selectionEmpirical 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).Back to article page