Resistance to the potato cyst nematode (Globodera rostochiensis) of tetraploid potato clones with different genetic backgrounds


  • N. Greco
  • L. Frusciante
  • D. Carputo
  • F. Della Rocca
  • A. Brandonisio


Fifteen new potato clones were screened to pathotype Ro2 of the potato cyst nematode, Globodera rostochiensis. One dm} clay pots were filled with soil infested with 17 eggs of the nematode/em} and six of them were planted with tubers of each clone and arranged in a glasshouse at 18-22 0c. When thirty-five days old, all plants were uprooted and nematode infestation of the roots evaluated according to a visual score and by extracting all nematode developmental stages. All clones were invaded by a large number of nematode specimens. However, in seven potato clones (S90-1575-5, S90-157-19, S90-157-27, S90-157-28, S90- 157-49, S90-164-1, S90-164-7) most of the nematodes (71.4-94.8%) remained at the second stage and none or only a few developed further to become third, fourth and adult female stages and cysts. These clones were considered resistant.