Screening of rice (Oryza sativa L.) genotypes for salinity tolerance under laboratory condition

Abstract

The present experiment was conducted in order to screen 12 rice genotypes including two checks to ascertain the salinity tolerance capacity of each genotype under five salt (NaCl) concentrations in the laboratory of Department of Seed Science and Technology, University of Agricultural Sciences, Raichur during the year 2018. The experiment consisted of five levels of salinity (0, 40, 60, 80 and 100 mM NaCl) and twelve different rice genotypes. The results revealed that among the five levels of salinity S1: 0 mM NaCl recorded significantly higher seed germination (90.0 %) and vigour (3011) compared to higher salinity levels and among the various genotypes GNV 1109 with 94.1 per cent seed germination and seedling vigour (3533) was found to be salinity tolerant. However, irrespective of the genotypes, the seed germination and seedling vigour went on decreasing with increase in salinity levels.