Indian Society of Genetics & Plant Breeding

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HETEROSIS AND COMBINING ABILITY FOR QUALITY AND YIELD IN EARLY MATURING SINGLE CROSS HYBRIDS OF MAIZE (ZEA MAYS L.)

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Combining ability analysis was conducted in early maturing maize (Zea mays L.)
inbred lines for quality and yield attributes. Both additive and non additive gene
effects were present in the material under study. However, the ratio of additive/non
additive genetic variance revealed that there was preponderance of non additive
gene action in the expression of yield per plant, protein content and starch content,
while for oil content and lOG-grain weight there was preponderance of additive
gene action. Inbred line X2W·3232-l-l-l-l was good general combiner for alI the
three quality traits along with grain yield. Inbred line XIW-l527-2-2-l-l was also
good general combiner for all the three quality traits along with lOG-grain weighl
Single cross Pop.30-5044-2 x CD<W>-1l3-2-l-2-l had positive significant sca effects
for oil content along with grain yield per plant and lOO-grain weight with highest
estimate of economic heterosis for oil content. In general, parental inbreds possessed
high per se perfonnance for quality traits along with grain yield per plant and
lOG-grain weight. Significant economic heterosis for starch and protein in content
could not be obtained.
 

Keywords: Zea mays L., combining ability, quality traits

Info

Year: 1998
Volume: 58
Issue: 4
Article DOI: NA
Print ISSN: 0019-5200
Online ISSN: 0975-6906

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