DEVELOPMENT OF RICE GENOTYPE TOLERANT TO ACID SULFATE AND SALINE SOILS USING NUCLEAR TECHNIQUE.

Nuclear technique has been used to induce mutation in a traditional aromatic rice variety, Tam Xoan (TX). Three promising mutants have been selected possessing high tolerance to slightly acid sulfate soils, namely TXDB-1, TXDB-83 and TXDB- 93. TXDB-93 exhibits high tolerance to saline soil (0.4%). Cooked rice of TXDB-1 could retain typical aroma of the variety, while the other two TXDB-83 and TXDB- 93 genotypes express high yield and long grain appearance which meets the current exporting standards. A possitive correlation between hull colour and aroma was recorded. Further studies should be carried out to elucidate the event.