Morphogenetic Response of Assorted Rice Genotypes to Salinity in Tanzania

Salinity, where salts concentrate on the soil surface causing severe decline of crop yields, is a worldwide problem. In Tanzania salinity one major degradation challenges affecting over 3.5 million hectares limiting agriculture productivity various crops including rice. Most varieties grown are sensitive to and inadequate tolerant cultivars available in country. A hydroponics mass screening technique using Yoshinda Solution was used test 102 genotypes NaCl- saline treated non-treated solution at Agricultural Research Institute (TARI-Dakawa Centre). Different salt concentrations (4 dSm-1, 6 8 dSm-1 10 dSm) were experiment done three replications. The genotypic variability for tolerance observed as less injury symptoms, low Na+ accumulation Na+/K+ ratio plant tissues high biomass (fresh weight dry weight). Results revealed further those 28 (28.45%) out showed salinity, level 10dSm-1. Lines namely SR35266-2-18-2-1, SR35250-1-19-1-1, SR23364-128-1762-1-HV-1-1, SR35230-1-12-1-1, SR23364-128-1986-1-HV-1-1, SR34590-HB3433-4-1-1, SR35266-2-7-1-1, PBR1000922-1 SR34053 (#5-52)-1-4-2-10-3-3 performance under conditions. Others includes SR35266-3-1-5-1, SR34574-2-10-3-1-2-1, SR35278-2-10-1-1, SR35250-2-3-1-1, SR35266-3-2-3-1, SR35266-3-2-4-1, SR23364-133-184-1-HV-1-1, SR34592-HB-1-HV-1, SR34042F3-22-1-1-5-3 indicated had matter well. All increased levels differential some non-saline Among these lines SR34590- HB3433-4-1-1expressed dilution ability K+ lower compared other genotypes. study, therefore, suggests that can be breeding programs develop with potential traits.