Vol. 11, Issue 9 (2022)

Author(s):
Pradeep Kumar, Dr. Pusphendra Kumar, Dr. Vashali, Dr. SK Singh and Dr. Akash Tomer

Abstract:
Water stress is the most critical abiotic stress which under declines the rice yield in rainfed and drought prone environment. Majority of rice cultivated area in south Asia is under rainfed, where moisture stress at any of the critical growth stage such as tillering, panicle initiation, heading, grain filling etc. causes sharp decline in yield. Based on water stress resistance indices such as Stress tolerance level (STL), mean productivity (MP), geometric mean productivity (GMP), yield index (YI), yield stability index (YSI), Stress tolerant efficiency (STI), stress susceptibility index (SSI), and stress tolerance index (STE), were calculated grain yield per plant. Based on the water stress to resistant trait and their contribution to yield in diverse group of genotypes, SSI, STE, and YSI are the stress indices which can evaluate the stress resistance characters with precisions in a genotypes. The three genotype show high stability in grain yield under the stress i.e., N-22, Sharbati, and Kasturi respectively, appeared relatively more tolerance to water stress, with high yield performance in both stress and non-stress conditions.