Int.J.Curr.Microbiol.App.Sci (2020) 9(5): 881-890 881 Original Research Article https://doi.org/10.20546/ijcmas.2020.905.097 Reproductive Behaviour of Brassica juncea as Exposed to Drought Stress at Different Days after Sowing in Jammu Region Sapalika Dogra, Gurdev Chand * and B. K. Sinha Division of Plant Physiology, FBSc, SKUAST- Jammu, 180009, India *Corresponding author ABSTRACT Introduction Water deficit stress has effect on vegetative and reproductive stages of canola. The effect of water deficit stress was more during reproductive growth than vegetative growth of rapeseed (Ghobadi et al., 2006). The effect of drought stress is a function of genotype, intensity and duration of stress, weather conditions, growth, and developmental stages of rapeseed (Robertson and Holland, 2004). The water deficiency can influence inversely the grain of canola but this effect depends on the genotype, growth stage and the plant adaptation to the drought (Azizi et al., 1999). The water deficiency has the greatest effect on the grain yield of canola in flowering and pollination stage. Therefore, study of different traits including relative yield of genotypes under stressed and non-stressed conditions is as a starting point for understanding the drought tolerance process and selection of genotypes to improve International Journal of Current Microbiology and Applied Sciences ISSN: 2319-7706 Volume 9 Number 5 (2020) Journal homepage: http://www.ijcmas.com The drought tolerance of Brassica juncea genotypes viz., Kranti RSPR-03, RSPR-01, Pusa Bold and NRCDR-2 was investigated after exposure to at various growth stages in a pot experiment. Water stress imposed at branch initiation, flower initiation and siliquae formation stages in the form of 45, 60 and 90 (DAS) days after sowing. Various physiological and reproductive behavior were recorded which revealed significant differences among the various Brassica juncea genotypes. The drought susceptibility index (DSI) for seed yield was recorded to characterize the relative tolerance of genotypes. Relative water content was reduced maximum under drought stress conditions. Reduction in seed yield was observed when water stress induced at flowering stage and it also affects siliquae development. It was noticed that reduction in seed weight was minimum when water stress induced before floweringi.e., at 60 days after sowing. Average yield was found greater in Kranti and least in Pusa Bold. The findings of the present research investigation recommended the growing of Kranti in the drought prone areas to obtain high economic yield even in adverse condition. Keywords drought stress, reproductive behavior, relative water content, pollen viability Accepted: 05April 2020 Available Online: 10 May 2020 Article Info