Indian Society of Genetics & Plant Breeding
The component of genetic variation were studied in 54 TIC progenies over two
environments for grain yield and its component traits. The overall epistasis (i Type) was
present for all the characters except number of ear bearing tillers and spike length under
late sown conditions and weight of grains per spike under timely sown conditions.
However, j and I type of epistasis was more pronounced than i type in both environments
for all the characters. Both the additive and dominance components of genetic variation
were highly significant for all the traits. All the attributes exhibited high heritability
estimates under both the environmental conditions except ear bearing tillers under late
sown conditions. The additive and dominance gene effects were equally sensitive to the
change in environment. The j and I components of epistasis were more sensitive to
environment than i component. The possible application of genetic variances prediction in
wheat improvement programme has been discussed.
Keywords: TTC, epistasis, genetic variation, environment.
Year: 1996
Volume: 56
Issue: 3
Article DOI: NA
Print ISSN: 0019-5200
Online ISSN: 0975-6906
P. K. KATIYAR AND ZIAUDDIN AHMAD info_circle
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