RPIA and infection: Cisgenic “Désirée” potato plants with two Rpi genes (Rpi-blb3/RPI-sto1, Rpi-vnt1:/Rip-ch1, or Rpi-vnt1/Rip-sto1) and three Rpi genes (Rpi-blb3/Rip-vnt1/Rip-sto1) remained fully resistant to P. infestans or had reduced disease severity compared to susceptible controls under natural infection, during two-year field tests [52].