The experiment was carried out at Farm of Krishi Vigyan Kendra, Pampoli, East Kameng, Arunachal Pradesh during 2012-13.Generation means analysis was carried out to estimate the nature and magnitude of gene action in order to formulate breeding strategy for identifying the segregates with desirable horticultural traits and resistant to powdery mildew disease. The testing of validity of the assumptions is based on estimated values of t2 and regression coefficient (b) based on F1s . It is clear from the table that t2 was significant for pod length, pod width and 100 grain weight which reflect the failure of one or few assumptions.