Fig. 9.

Box plots of measured and predicted SY of rapeseed using selected traits as inputs. Algorithms are sorted based on the highest to lowest R² value from left to right. A. Training stage. B. Testing stage. MLR multiple linear regression, GLM generalized linear model, NuSVR nu-support vector regression, ESVR epsilon support vector regression, MLPNN multilayer perceptron neural network, RBF radial basis function, CP cubic polynomial, FS forward selection, SS stepwise selection, BS backward selection