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Relation of height to spike length, spikelets per spike,
number of seeds per spike and thousand kernel weight was
studied (Table 2). Phenotypic
correlations between plant height and these characters
revealed that in case of Sonalika control, the height is
positively correlated to spike length and spikelets per
spike ; spike length is positively correlated with spikelets
per spike and seeds per spike. Spikelets per spike are
positively correlated with seeds per spike but number of
seeds per spike is negatively correlated with thousand
kernel weight. In case of the dwarf mutant of Sonalika,
spike length is positively correlated with spikelets per
spike and seeds per spike. The most interesting fact is that
in case of dwarf mutant, the negative correlation between
seeds per spike and thousand kernel weight is weakened.
In case of Arjun control height is negatively correlated
with thousand kernel weight and seeds per spike is
positively correlated with spike length and spikelets per
spike. The correlation between seeds per spike and thousand
kernel weight is negative although not significant. In case
of the dwarf mutant spike length is positively correlated
with spikelets per spike and seeds per spike and spikelets
per spike are positively correlated with seeds per spike and
thousand kernel weight.
Thus, the results presented indicate that further reduction
in plant height adversely affects the yield components in
case of the variety Arjun. In case of the variety Sonalika
further reduction in plant height has resulted in decrease
in seeds per spike but increase in kernel weight. The dwarf
mutant of Sonalika can be used as genetic stock in cross
breeding with other varieties possessing high number of
seeds per spike to combine these two characteristics.
Reference
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