Heterosis and Inbreeding Depression Study in Castor (Ricinus communis L.) using 21 Generations

Author: I.R. Delvadiya*, R.B. Madariya and A.V. Ginoya

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Abstract

ABSTRACT: Heterosis and inbreeding depression studies in castor were carried out on twelve characters against two crosses (SKI-346 × JI-35 (cross 1) and SKI-346 × SKI-215 (cross 2) using 21 Generations at Main Oilseeds Research Station, JAU, Junagadh, Gujarat. The information on heterosis and inbreeding depression together facilitates the breeder to take a decision on whether to exploit hybrid vigour or perform selection in segregating generations. The heterosis over better parent was found significant in desirable direction for days to flowering of primary raceme, days to maturity of primary raceme, number of nodes up to primary raceme, number of effective branches per plant, 100-seed weight, seed yield per plant and oil content in SKI-346 × JI-35; and plant height up to primary raceme, number of nodes up to primary raceme and seed yield per plant in SKI-346 × SKI-215. Significant and positive inbreeding depression was also observed for days to flowering of primary raceme and for

Keywords

Keywords: Relative heterosis, Heterobeltiosis. Inbreeding depression, Gene effects, 21 Generations, Castor.