Morphological variations: A range of morphological
variation was observed in the newly generated plants of
both the genotypes with different radiation dosage. Seven
important characteristics (plant height (PH), ear bearing
tillers (EBT), maximum panicle length (MPL), grain length
(GL), grain breadth (GB), flag leaf length (FLL) and %
sterility) were selected to analyze the influence of gamma
irradiation treatments on performance of plants. The
doses/concentration of GR 20 and GR25 Kr irradiation
increased the morphological and yield parameters over
those in controls. The highest panicle length was shown
by FR13A at GR 25 Kr which is slightly more than the
untreated FR13A. Similarly, the highest ear bearing tillers
was shown by FR43B at GR 25 Kr (11.2). The panicle
length of FR43B at GR 25 Kr was slightly higher than the
control. No remarkable difference was noticeable in the
grain length and grain breadth of both the genotypes. At
31.63cm, FR43B at GR25 Kr has the longest flag leaf.
Similarly, the flag leaf length of FR13A 25 Kr was more
than control. However, a visible change in the % sterility
was noted. The % sterility of both the genotypes was 5-
10% when untreated but it gradually increased with the
increase in the radiation dosage. The highest %sterility
was shown by FR13A with GR 30Kr (that is, 65%) (Table
2).
Submergence