Abstract:
The behaviour of six characters on direct and reciprocal hybrids of
two intervarietal crosses in rice was studied along with their parents and the
following conclusions were drawn. There was a clear evidence of positive
heterosis in plant height. The hybrids showed increase in plant height over
the two parents. All the hybrids are significantly superior to both of the parents with respect to the total number of tillers produced. With regard to
the number of nodes the hybrids did not show any significant difference over
the parents. In the area of flag leaf the hybrids between Dee-Geo-Woo-Gen x
Annapurna manifested positive heterosis while the reciprocal hybrids showed
little heterosis. As regards the area of second leaf from the tip both the
hybrids were not superior over the parents. But for the character of second
leaf angle the hybrids were superior to their parents with reduced leaf angle.
In general hybrids were better than the parents with respect to plant
height, number of tillers, area of flag leaf and leaf angle.
