BREEDING BEHAVIOUR OF f3 FAMILIES IN RELATION TO F2 PERFORMANCE IN RICE
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Date
1995
Authors
Journal Title
Journal ISSN
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Abstract
Breeding for yield improvement in self-pollinated crops
requires
identification
superior
of
crosses
in
early
segregating generations, thus enabling the breeder to grow
large populations in subsequent generations for recovery of
desired genotype ( s). A study was therefore, undertaken in
rice to verify breeding behaviour of F3 families in relation
to breeding potential of crosses identified in F2 generation.
Among ten crosses involving 13 parents evaluated in F2, five
crosses namely Daya/IR36, Shrabani/IR36, IR72/ORP665-14,
IR36/KM30
Shrabani/IR64 and
Ajaya/Jajati, Shrabani/IR36
were
found
potential.
The
evaluation of F3 families of the ten crosses revealed that
Daya/IR36,
namely
crosses
four
crosses
of
out
10
and
Birupa/IR64
were
found
potential. Further the classification of F2 plants into low,
Yielding categories revealed their
medium and high
importance
in
F3
by
showing
high
magnitude
of
mean
performance and variation in progenies of high yielding
category than in the low.
On the basis of the present study it may be stated that
predictions for high grain yield in rice from the mean
performance of parents and early generation bulk hybrids
would seem to be useful and reliable in obtaining potentially
superior segregants for release as cultivar(s).
Description
Th-2637
Keywords
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