a variable for model selection. May be "fix" (fixed model) or "random" (random model).
data
a 'data.frame' where to look for explanatory variables
Author
Andrea Onofri, Niccolo' Terzaroli, Luigi Russi
Details
a design matrix of n-1 parentals
References
Onofri, A., Terzaroli, N. & Russi, L. Linear models for diallel crosses: a review with R functions. Theor Appl Genet (2020). https://doi.org/10.1007/s00122-020-03716-8