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Molecular Plant Breeding 2013, Vol.4, No.6, 44
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6.01 to 3.55 % over standard check. The crosses,
10×3, 10×9, 11×10 and 10×3, 9×3, 7×3 were found to
be desirable crosses both over better parent and
standard check with respect to protein and starch
content, respectively. Similar findings were also
obtained Krishnaveni (1983) and Lal et al
(2011). So
one can go for hybrid development is the only way of
attaining high grain yield per plant.
It is clear from the above discussion that three crosses,
5×2, 12×2, 5×4 for days to 50% tasseling and 14×4,
6×5, 11×10 for 50 % maturity were found to best
crosses for earliness. Crosses, ×5, 10×7, 4×3, 8×7 and
14×10 can be exploited commercially for grain yield
per pant. For protein and starch content, crosses 10×3,
10×9, 11×10 and 10×3, 9×3, 7×3, respectively, can be
exploited for improvement of these desirable quality
characters. It is worth while to take up trails on
farmers field to study the performance of this potential
crosses, so as to make commercial exploitation of
hybrid vigour a reality and also these Promising single
cross hybrids for maturity, grain yield characters and
quality parameters may be used for further
improvement of lines by selection in advanced
generations.
Material and Methods
The present investigation was carried out to study
heterosis in maize. The experimental material
comprised of fourteen newly developed inbred lines
viz.
, DMIL 1,DMIL 2, DMIL 3, DMIL 4, DMIL 5,
DMIL 6, DMIL 7, DMIL 8, DMIL 9, DMIL 10, DMIL
11, DMIL 12, DMIL 13 and DMIL 14 and hybrids
generated by crossing the above inbreds in all possible
combinations excluding reciprocals. The fourteen
parents and 91 crosses were risen in lattice square
design with two replications at maize scheme, MARS,
University of Agricultural Sciences, Dharwad during
kharif
2010
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2011. All the management practices were
followed as per recommendations. So as to rise a
normal crop. Observations were recorded on five
randomly selected plants of each treatment in two
replications for six characters
viz.,
days to 50%
tasseling, days to 50% maturity, test weight (g), grain
yield per plant (g), protein content (%) and starch
content (%).
Authors' contributions
The author conducted the major part of this study including
experimental design, data analysis and manuscript preparation.
Netravati and G shanthakumar participated in experimental
design and preliminary analysis of data. Prakash Gangashetty
and Laxman Malkannavar carried out statistical analysis.
Sateesh Adiger did final data analysis, tables and manuscript
preparation. All authors read and approved the final
manuscript.
References
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