Author(s):

Delvadiya IR, Dobariya KL, Ginoya AV and Patel JR

Abstract: An experiment was conducted to know the nature and magnitude of heterosis for seed yield per plant and its eleven yield attributing components. Experimental material consisting of 95 entries comprised of four pistillate lines (used as females) and eighteen inbred lines (used as males) and their 72 hybrids developed through line x tester mating design along with standard check hybrid (GCH 9) were evaluated in a randomized block design with three replications. Perusal of mean data revealed that among females, SKP 84 and JP 96 and among males, SKI 392, SKI 215 and SKI 405 exhibited higher per se performance for seed yield per plant and its contributing traits. Three crosses viz., JP 96 × SKI 392, JP 96 × SKI 215 and SKP 84 × JI 244 appeared to be the most suitable crosses for exploitation in practical plant breeding programme in castor, as they recorded 41.34 per cent, 25.89 per cent and 45.99 per cent significantly the higher heterosis over their respective better parent; and 52.45 per cent (429.00 g), 29.38 per cent (364.07 g) and 27.77 per cent (359.53 g) significantly the higher heterosis over standard check GCH 9 (281.40 g). These cross combinations also possessed high per se performance for one or more yield contributing traits.

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