Effect of gibberellic acid (GA3) on yield, floral and morphological traits in rice (Oryza sativa)
2009
Singh, Tejbir | Sharma, Manoj Kumar | Tyagi, J.P. | Singh, Sanjay
The present investigation was aimed t study the effect of gibberellic acid (GA3) on yield, floral and morphological traits in rice. The dose of 70 g/ha of GA3 was found optimum for increased seed yield and seed setting. Further, an increase in morphological character such a plant height, panicle exsertion, flag leaf angle and floral characters as stigma and style length, anther length and spikelet opening angle was observed with application of GA3. However GA3 application had no effect on total number and productive tillers/plant. GA3 application improves the style and stigma length and stigma exsertion of cytoplasmic- genetic male sterile (cms) parent: filament length anther length in male parent which ultimate favours pollination of seed parent. Good panicle exsertion in cytoplasmic genetic male sterile (cm) parent expose higher number of spikelet's to come out from flag leaf sheath to receive more pollens resulting in enhanced out crossing and seed set.
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