Generalized genetical genomics design (GGG)
The population of 100 tomato lines was divided into two sub-populations based on the distribution of parental alleles. By using the R-procedure DesignGG (Joosen et al. 2013; Li et al. 2009) the tomato lines were allocated to the suitable sub-population in a way that alleles show a similar distribution in both sub-populations as compared to the whole population (Kazmi et al. 2017).