TABLE 2.

Assessment of the somatic hybrid (SH) 83/9, between potato cv. ‘Delikat’ and Solanum bulbocastanum (blb41) and derived back-crossed progenies BC₁ (the cultivar used for crossing is indicated), for the presence of the resistance genes as revealed by gene specific markers, functional profiling of Avr genes by agro-infiltration, resistance to late blight in a detached leaf assay (DLA) and in the field (Δ-rAUDPC); standard varieties ‘Adretta’ (susceptible) and ‘Sarpo Mira’ (resistant to late blight) were used; the year of the field assays is given as a subscript to each value of Δ-rAUDPC; from each genotype three plants and three leaflets were infiltrated, hypersensitive reaction is indicated by HR and lack of reaction by 0: the numbers in brackets indicate the number of repetitions with the same reaction.

Progenies with four stacked resistance genes, showing HR reaction and improved resistance to Pi in DLA and the field are highlighted in red; nd-not determined.