P. Bhattarai, B.B. Khatri, P. Karki and B. Chaudhary
National Potato Research Programme, Khumaltar, Lalitpur
Regional Agricultural Research Station, Tarahara, Sunsari
Corresponding author: prkash235@yahoo.com
Received on: 14-7-2017, revised on: 28-8-2017, accepted on: 30-8-2017
 

DOI

ABSTRACT
 
Advanced sweet potatoes genotypes selected from different on-station trials were evaluated inh the farmer's field of Sunsari district (136masl), Eastern Terai of Nepal during the years 2014-2016 to identify the high yielding genotypes adaptable in the study area. Five sweet potato genotypes namely CIP 440015, CIP 440021, CIP 440012, CIP 440328 and CIP 440267 including 'Japanese Red' (a standard check) and 'Sunsari-1'(farmer's local check) were evaluated in randomized complete block design (RCBD) with three replications. Overall, the orange fleshed genotypes received from International Potato Center (CIP), Lima, Peru performed better than other lines. The results of three years data revealed that the highest total tuberous root yield (22.56 t/ha) was recorded in CIP 440267 followed by CIP 440012 (20.63 t/ha). Also, these two genotypes were found tolerant to pest damage and highly preferred by the farmers in the farmer's preference rating. Sunsari-1 produced the least mean tuberous root yield (5.98 t/ha) compared to all other tested genotypes. The results showed that CIP 440267 and CIP 440012 gave the best performance in majority of the yield and yield contributing parameters and hence preferably the best orange fleshed genotype among the tested genotypes having optimum yield potential and better adaptability in the Eastern Terai of Nepal.