Author(s):

Manish Kumar, A Kumar, NP Mandal and Diwakar Prasad Nirala

Abstract: Drought is the major abiotic factor that limit rice productivity in rainfed and upland ecosystems; worldwide, it reduce yield by 15–50% depend on the stress impact on crop growth period. Stress period more than 6-24 days occurs, drastic reduction observed in all the parameters i.e. average plant height 23.4-47.5%, panicle number 21.6-35.4%, yield of aus germplasm population 17.34-66.04% followed by an average of overall 41.69% over non-stress condition. Similarly it was found that biomass, harvest index, filled grain per panicle, total grain per panicle, fertility % and so on were reduced under stress condition in comparison to congenial condition.Variation in drought susceptibility index (DSI) and Drought resistant index (DRI) in the aus germplasm population ranges 1.081 to 2.116 and 0.24 to 3.80 respectively. Significant correlation and variations observed in the population for different agronomical traits & derived indices will facilitate selection aus germplasm population with drought tolerance and high yielding

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