Journal of FARM SCIENCES, Vol 31, No 3 (2018)

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Heterosis studies for yield and yield components in rabi sorghum [Sorghum bicolor (L.) Moench]

PRATEEKSHA S. KHADI, B. D. BIRADAR, S. K. PATTANASHETTI

Abstract


The experiment was carried out to study the heterosis by involvingimproved cultivars (DSV-4, DSV-5, Phule Vasudha, Phule Revati,PKV Kranti, CSV-216R), land race (BRJ-358) and a stay green line(CSG-17). These eight genotypes were crossed in a daillel fashion(without reciprocals) to generate 28 F1 crosses. These 28 crossesalong with parents and one standard check DSH-4 (rabi sorghumhybrid) were evaluated at the Regional Agricultural Research Station,Bijapur during rabi 2011. The Analysis of variance revealed presenceof adequate genetic variability in the experimental material for all thetraits studied. Significant mean squares due to parents v/s hybridindicated presence of average heterosis for all the characters. Amongthe top ten hybrids exhibiting heterobeltiosis for grain yield and otheryield components the hybrids viz., DSV-4 x PKV Kranti, DSV-5 xPKV Kranti, exhibited very high heterosis not only for yield but alsofor other traits. These two hybrids can be advanced to furthergenerations for deriving high yielding and charcoal rot resistantgenotypes as DSV-4 and DSV-5 are highly resistant to charcoal rot.The present study clearly indicated that presence of non additivegene action and heterosis can be exploited for improvement of yieldand its components in rabi sorghum. Many hybrids exhibited heterosisfor earliness, plant height and grain yield, thus indicating that theearly maturing cum dual purpose hybrids can be developed for rabiseason. This would help to solve the problem of terminal stressexperienced in rabi season to some extent.

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