Background: 6-benzyl aminopurine (BAP) is a dominant regulation in minitubers formation. BAP treatment enhances both Crop quantity and quality parameter like days to emergence, number of shoots, shoot length, root length, number of stolons, number of minitubers, potato shape index and fresh weight of minitubers. The purpose of this study was to optimise the effect of different concentrations of BAP on potato (Solanum tuberosum L.) minitubers in a net house and in field. 
 
Methods: The present investigation, effect of BAP different concentration on potato (Solanum tuberosum L.) microtubers and minitubers were done at Central Potato Research Institute Campus, Modipuram, Meerut during 2012-13 and 2013-14. This experiment design was split plot with five replications and three treatments. In vitro BAP treatments for microtuber growth parameters included three doses (0.75 mg/l, 1.5 mg/l and 2.25 mg/l). BAP treated microtubers were planted in net house, again in next season BAP treated minitubers were planted in field. Growth and yield parameters were recorded. 
 
Result: The concentration of BAP (1.5 mg/l) led to decrease in all parameters as compared to BAP at (2.25 mg/l) treatments in both the varieties. Same result was also observed in field.

Effect of 6-Benzyl Aminopurine Different Concentration on Potato (Solanum tuberosum L.) Minitubers in Net House and in Field