Indian Society of Genetics & Plant Breeding

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HETEROSIS IN RELATION TO COMBINING ABILITY IN SESAME

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The performance of 36 hybrids of Sesamum i,.dicum L. involving cultivars of diverse origin
was·studied to estimate heterosis for seed yield and other component characters. The
midparental (MP) and better parent (BP) heterosis for seed yield ranged from-91.9 to 76.3%
and -47.1 to 72.5%, respectively. Out of 36,19 hybrids showed significant positive heterosis
over the corresponding BP for seed yield. Significantheterosis for all the other components
(except for plant height and per cent oil), the highest magnitudes being from seed yield on
secondaries, seed yield on primaries and seed yield on main stem was also observed,
indicating their contribution towards seed yield heterosis. Crosses, R 84-4-2 x VS 16 and
RT S4 x VS 16, involving high general combining parents, manifested very high and
significant heterosis and sea effects for seed yield, and are useful for exploiting hybrid
vigour
 

Keywords: Sesame, heterosis, general combiners, sea effect.

Info

Year: 1993
Volume: 53
Issue: 1
Article DOI: NA
Print ISSN: 0019-5200
Online ISSN: 0975-6906

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