A diallel derived set of seven diverse parents of pigeonpea and their 21 F 1′s were evaluated under two cropping systems of sole crop and intercrop with pearl millet for yield and yield contributing characters. Wide range of heterosis was exhibited for eleven characters. The hybrids C-l1 x ICP-7119 and Prabhat x C-lt were promising for grain yield/plant under both the cropping systems. The magnitude of heterosis was influenced by the cropping systems. The hybrid, Prabhat x C-lI recorded highest mean heterosis (50.91%) followed by T-21 x ICP-7035 (35.86%) under sole crop, while No. 148 x Prabhat (95.18%) and No.148 x T-21 (70.54%) recorded highest mean heterosis under intercrop situation.
