Abstract
Under 16% soil moisture content conditions at 30°C in darkness, the mesocotyl length of Bangladesh deepwater rice varieties ranged from 2 to 173mm with an average of 33±18.5mm. In about 34% of varieties mesocotyl length varied from 51 to 100mm, and in about 15% of varieties mesocotyl was longer than 100mm. Among the varieties from three land levels, the average mesocotyl length was largest in the varieties from the lowlands, next in the varieties from medium lowlands and the smallest was in the varieties from medium highlands. An inverse relationship between mesocotyl elongation and plant elongation ability was observed (r=-0.293, n=188) .
