Evaluation of Near Isogenic Lines (NILs) of rice for major abiotic stresses of coastal areas
Abstract
Rice crop in coastal areas is very often subjected to major abiotic stresses like submergence, lodging of the crop caused by heavy rains or cyclones and salinity. Identification of genotypes tolerance to multiple abiotic stresses is needed to sustain under climate changed conditions. NILs of Pushyami (MTU 2336-62-25-38-16, MTU 2336-70-46-25-44) with Sub1 locus expressed tolerance to flash floods and also stagnant flooding and lodging resistance. NILs of Amara (MTU 2244-119-59-63-40, MTU 2244-119-83-65, MTU 2244-39-10-44-1) having sub1 expressed tolerance to stagnant flooding, lodging resistance and moderate tolerance to salinity along with targeted trait of flash flood tolerance. NILs of Swarna (MTU 2546A-13-1-6-1, MTU 2546A-12-18-1, MTU 2546A-34-1-9-1) expressed moderate tolerance to anaerobic germination along with its targeted lodging related traits. NILs of Cottondora sannalu (DST 8-162-4, DST 9-157-7, DST 8-4-4) expressed lodging, flash flood, anaerobic germination along with targeted trait of seedling stage salinity tolerance. The results showed that NILs possessing multiple abiotic stress tolerance would sustain even under climate changed conditions.
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