Indian Society of Genetics & Plant Breeding

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EVALUATION OF MAIZE INBRED LINES DERIVED FROM TWO HETEROTIC POPULATIONS

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Factorial mating analysis of eighty crosses of maize (Zea mays L.), produced by crossing
five females with sixteen pollen parents, was conducted over two locations for combining
ability. Mean squares due to environments (E), females (F), males (M), F X M, F X E, M X E,
and F X M X E were significant for grain yield and most of the quantitative traits studied.
Specific combining ability (sea) and sea x E components were of higher magnitude than
general combining ability (gca) and gca x E components for grain yield, indicating greater
contribution of nonadditive gene action and its pronounced interaction with the
environments. Sixteen crosses significantly outyielded the best hybrid check. Some of the
high yielding hybrids were short, with high harvest index and at par with the best check
for silkingand maturity. These studies provided possibility to obtain better hybrids which
may be used in breeding programme.
 

Keywords: Zea mays L., maize, combining ability, harvest index.

Info

Year: 1992
Volume: 52
Issue: 2
Article DOI: NA
Print ISSN: 0019-5200
Online ISSN: 0975-6906

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