The results of this study concerning the genetic control of pumpkin yield are supported by the moderate herita- bility (43%) with moderately high genetic gain (44%) that was recorded for yield by Mohanty and Mishra [50]. In addition, additive gene action has been suggested to control the expression of yield and its components in pumpkin [51]. These results support the feasibility of ge- netic manipulation of yield in pumpkin. Further research is required to investigate the influence of between rows spacing on pumpkin yield and to confirm same results from experiments conducted over one year (potassium foliar application) or one location (genotype by envi- ronment interaction).