A Present investigation was conducted on “Characterization of weedy rice genotypes and study the impact
of bioregulators ( IAA and GA 3 ) on seed germination of weedy rice genotypes in Jammu region”. Three
different genotypes of weedy rice were identified in farmers’s fields viz. Awnless brown husk, Awns
brown husk and Awnless dark brown husk. The present study was carried out on weedy rice to study their
characterization on the basis of morphology, physiology, biochemical and yield attributes parameters
present in the Jammu region. Two bioregulators IAA and GA 3 were used to examine the effect on seed
germination of different genotypes of weedy rice that were treated with various concentrations of IAA (0.1
ppm, 0.5 ppm, 1.0 ppm, 2.0 ppm, 2.5 ppm) and GA 3 (05 ppm, 10 ppm, 15 ppm, 20 ppm, 25 ppm) along
with control. The results obtained from the study revealed that the plant height (cm) and the number of
tillers were noticed significantly higher in Awnless brown husk (150.66 cm and 19.0). Number of
grains/panicle and grains yield/plant was also increased significantly in the Awnless brown husk (225.0
and 6.41 g). Chlorophyll (SPAD value), chlorophyll ‘a’, chlorophyll ‘b’ and total chlorophyll was observed
significantly higher in Awnless brown husk (67.63, 3.47 mg/g F.W, 0.62 mg/g F.W and 4.09 mg/g F.W.
Impact of bioregulators (IAA and GA 3 ) on days required for seed germination of 1%, 50% and 100% was
significantly lower when plants treated with GA 3 @25 ppm (2.66, 5.33 and 10.77). Seedling length (cm)
was maximum in plants treated with GA 3 @25ppm (9.81cm ) as compared to control (7.44 cm). Therefore,
it has been concluded that among all the treatments of IAA and GA 3 , seeds treated with GA 3 @ 25 ppm
performed better results and germinated weedy rice seeds in the field early as compared to other
treatments.