Indian Society of Genetics & Plant Breeding

Combining ability of new Basmati fertility restorers for grain yield and its components in rice (Oryza sativa L.)

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A line x tester (L x T) analysis was carried out in rice
to characterize the newly identified fertility restorers of
basmati type and their hybrids for general
(gea) and
(sea) combining ability. Twenty-one fertility
restorers including 11 basmati type were selected after
screening 45 improved germplasm collections with 4
cytosterile lines. The restorers and their hybrids were
evaluated for grain yield and its component traits in a
randomized block design (RBD). Of the 11 basmati type
5 were identified to be effective restorers. Restorer Basmati
385 and HKR 241 were found to be good general combiners
for grain yield/plant, biomass yield/plant, 1000 grain weight
and number of primaries/panicle, P1031 for 1000 grain
weight and effective tillers/plant while, Karnal Local for
biomass yield/plant and 1000 grain weight. Among eMS
lines IR 58025A and PMS 3A were characterized as good
general combiners for grain yield and other traits. The
specific cross combinations characterized with high
sea effects were IR 58025A x Basmati 385, IR
62829A x Basmati 385, IR 62829A x HKR 241 and PMS
3A x P1031-8-5-1 for grain yield/plant, biomass yield/plant
and effective tillers/plant. IR 62829A x Karnal Local for
1000 grain weight, PMS 10A x SAP Khalsa 7 for days to
50% flowering and PMS 3A x HKR 241 for primaries/panicle.
gea effects of the parents were not reflected in the
sea effects of the crosses in all traits studied. No
generalized order of nicking among the parents to produce
desirable combination was observed. Any sort of
combination among the parents gave hybrid vigour over
the parents which might be due to favorable dominant
genes, over dominance or epistatic action of the genes.

Keywords: Rice, basmati hybrids, combining ability, fertility restorers, Oryza sativa


Year: 2007
Volume: 67
Issue: 2
Article DOI: NA
Print ISSN: 0019-5200
Online ISSN: 0975-6906



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