Indian Society of Genetics & Plant Breeding

Combining ability for polygenic traits in early maturing hybrids of maize (Zea mays L.)

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Combining ability analysis using line x tester design was
conducted in white seed colour early maturing maize (Zea
mays L.) inbred lines for yield and yield contributing
characters. There was greater contribution of lines
towards cr'lgca for all the traits. Inbred lines viz.,
1W-1627-1-1 and X2W-3997-2-1-7 were good general
combiners for all the characters except 100-grain weight.
Tester CO(W) was good general combiner for grain yield
per plant, grain cob ratio and straw yield per plant.
Among the selected hybrids, two parent (TP) conventional
single cross hybrid exhibited highest magnitude of positive
significant sca effect with highest magnitude of significant
positive economic heterosis for grain yield per plant and
it was followed in descending order by the multiparent
(MP) conventional three way cross and nonconventional
two parent (TP) top cross hybrid.

Keywords: Maize, combining ability, conventional & non-conventional hybrids.


Year: 2002
Volume: 62
Issue: 4
Article DOI: NA
Print ISSN: 0019-5200
Online ISSN: 0975-6906



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