1Central Potato Research Station, Shillong, 793 009, Meghalaya, India.
2Central Potato Research Institute, Shimla, 171 001, Himachal Pradesh, India.
*Present Address: Central Potato Research Institute Campus, Modipuram, Meerut, 250 110, Uttar Pradesh, India. E-mail: vijaicprs@yahoo.co.in
