Indian Society of Genetics & Plant Breeding

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SELECTION OF PARENTS AND PREDICTION OF HETEROSIS IN RICE

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An experiment was conducted to study the relationships between parental lines and
heterosis by using 29 hybrids, 26 restorers and 3 maintainers. The results revealed
that the reproductive phase initiation(RI) was invariably early in hybrids. The
reproductive phase duration (RD)' was invariably longer in hybrids which showed
better parent heterosis. The distribution of parents based on DMRT followed by
joint scoring over seven traits indicated most parents in Medium group which
contained 87"10 of the promising restores (whose hybrid combinations showed better
parent heterosis for yield). The relationship between parental lines showed that
heterosis resulted from the complementation of traits. A thorough evaluation of
restorers for various traits is necessary to choose appropriate ones and the restorers
for making heterotic combinations should be drawn preferably from Medium group.
 

Keywords: Rice, heterosis, prediction, selection of parents

Info

Year: 1999
Volume: 59
Issue: 3
Article DOI: NA
Print ISSN: 0019-5200
Online ISSN: 0975-6906

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