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The present investigation on "Inheritance of grain yield and its
components in Triticum aestivum L." was undertaken in three
crosses, each with the set of six generations viz., P1, P2, F1, F2,
B1 and B2.The present investigation revealed that cross NI-5439 x
PHR-1009 can provide better opportunities for improvement through
selection procedure than rest of the crosses i.e. NIAW-917 x VL-852
and HD-2189 x FLW-8. Though significant dominance and dominance x
dominance gene components were observed for many characters in the
three crosses studied, it cannot be exploited because of presence
of duplicate type of epistasis. In such a situation maximum gain
could be attained by maintaining considerable heterozygosity
through mating of selected plants in early segregating generations
or some sort of Recurrent Selection, Diallel Selective Mating
System (Jensen, 1970) or Biparental Mating (Joshi and Dhawan, 1966)
should be practiced. This would certainly enhance possibility that
vvarious recombinations may result in the accumulation of
favourable genes in ultimate homozygous lines.few cycles of
recurrent selection followed by pedigree breeding approach can be
suggested to improve the Yield.
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