Indian Society of Genetics & Plant Breeding

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HETEROSIS AND COMBINING ABILITY IN RAPESEED (BRASSICA NAPUS L.)

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A nine-parent diallel study conducted on the yield components and oil content in rapeseed
(Brassica napus L.) revealed that mean squares due to general and specific combining
ability were significant, suggesting the importance of both additive and dominance
components. Parents GSL, 8809, HPN-l, GSL 1501 and HNS 8803 were good combiners for
seed yield and some of its components, and oil content. Estimates of heterosis over better
parent (BP) for various traits indicated significant magnitude for seed yield (-14.8 to 82.80/0),
primary branches (-26.0 to 193.60/0) and siliquae per plant (-21.9 to 162.6%). Unidirectional
dominance was observed for most of the traits studied. The cross GSB 7027 X HNS 8803
gave highest positive heterosis for seed yield per plant.
 

Keywords: Heterosis, combining ability, rapeseed, Brassica napus L.

Info

Year: 1997
Volume: 57
Issue: 2
Article DOI: NA
Print ISSN: 0019-5200
Online ISSN: 0975-6906

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