Studies on Solanum vernei 62-63-3 and hybrids of S. vernei 62-33-3 x Kufri jyoti for resistance against potato cyst nematodes in Nilgiris Thangaraju D., Sundaram R. Potato Golden Nematode Laboratory, State Seed Farm, Vijayanagram, Ootacamund-1. Presented at Nematology Symposium held at Coimbatore, India in February, 1981 Abstract Solanum Vernei 62-33-3, a hybrid potato clone resistant to Dutch pathotype ‘D’ received from Holland was subjected to two pot culture and two field experiments with the cyst nematode population of project experimental farm, Vijayanagram, Ootacamund. The other test plants viz S. tuberosum, S. andigenum and S. vernei G. LKS 58-1642-4 were also included in pot culture studies. In potted conditions, 15 to 212 new cysts on S. tuberosum, 48 to 176 cysts on S. andigenum, 41 to 85 cysts on S. vernei and only one in S. vernei 62-33-3 were recorded. Similar results were obtained in 62-33-3 under field conditions also. From the observations it is inferred that the material tested is resistant to ‘D’ pathotype in Nilgiris (now G. pallida). Since the above material was found highly susceptible to late blight, Phytophththora infestans, breeding was taken up at C.P.R.I., Simla. The progenies were evaluated for resistance against cyst nematodes. Among them four viz. progenies 10, 14, 21 and 28 showed more resistance. They were tested in 30 populations during 1978–80 and found to be tolerant to G. rostochiensis and G. pallida. Top |