Linear-Bilinear Model Use the drop-down menu to specify the type of linear-bilinear model to fit. Available model types are described in the table below: Model: Description: AMMI Additive Main Effects and Multiplicative Interactions. Includes Intercept , G 1 , and E 2 . GREG Genotype regression . Includes Intercept and G . SREG (GGE) Site Regression. Includes Intercept and E . SHMM Shifted Multiplicative Model. Includes Intercept . COMM None. 1 Genotypic Effects 2 Environmental Effects To Specify the Model: Select the desired model using the drop-down menu.