Release of germplasm resistant to multiple races of potato cyst nematodes

Seeds of three progenies segregating for resistance to two pathotypes of Gl obodera rostochiensis (Ro1 and Ro2) and two pathotypes of G. pallida (Pa2 a nd Pa3) are being released by the Cornell University Experiment Station and the USDA/ARS. This resistance is in a form suitable for North American pro duction and was developed for use in the event that pathotypes of G. pallid a, which are prevalent in many other potato production areas of the world, are ever introduced into North America. The source of the resistance is ger mplasm obtained in 1984 hom the International Potato Center in LaMolina, Pe ru. The combined resistance in this germplasm is from S. tuberosum ssp andi gena and S. vernei. Resistance to PVY is also segregating in two of these p rogenies.