Abstract
Selection of salt-tolerant rice varieties is necessary for climate changes in Mekong Delta. Twenty-eight floating rice lines collected from Cho Moi and Tri Ton districts, An Giang province were tested on salt concentrations at germination and seedling stage. Length of root and shoot, germination rate were estimated for the germination stage. Root length, plant height and survival rate were measured for the seedling stage. The rice lines were evaluated for salt tolerance in the hydroponic nutrient solution of 0, 1, 3, 5 %0 NaCl. Germination rate, shoot and root length of the most rice lines were reduced with the increase in salinity and strongly decreased at 5 %0 NaCl. However, lines TQS140, TQS142, TQS 145 and TDC were less affected with the increase of salt concentration. Increasing concentration of salinity led to reducing the height of plant and survival rate. Lines TQS 142 survived 85 % at 5 %0 NaCl. TQS142 may be potential for breeding material or seed resources in the salinity intrusion conditions.
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