Vol. 10, Issue 8 (2021)

Author(s):
IR Delvadiya, RB Madariya, AV Ginoya and JR Patel

Abstract:
The present investigation was undertaken with a view to generate genetic information on heterosis and inbreeding depression for seed yield and its component traits. The heterosis over better parent was found significant in desirable direction for total length of primary raceme, effective length of primary raceme, shelling out turn, 100-seed weight and seed yield per plant in JM-6 x 48-1 and for days to maturity of primary raceme, plant height up to primary raceme, number of nodes up to primary raceme, number of capsules on primary raceme, shelling out turn and oil content in JI-436 x PCS-124. Significant and positive inbreeding depression was observed for number of nodes up to primary raceme, total length of primary raceme, effective length of primary raceme, number of capsules on primary raceme, 100-seed weight, seed yield per plant and oil content in JM-6 x 48-1 and for days to maturity of primary raceme, number of effective branches per plant, number of capsules on primary raceme and oil content in JI-436 x PCS-124. The observed and expected estimates for relative heterosis, heterobeltiosis and inbreeding depression were in close agreement with either expected (1) or expected (2) for seed yield per plant and its component traits in both crosses of castor.