Abstract: On farm trials were established with two advanced hybrid rice lines, IR68877H and IR69690H during the boro season 2000-2001 in five locations-Fakirhat, Babuganj, Bhola sadar, Mothbaria and Nalchhiti upazilla under Bagerhat, Barisal, Bhola, Pirojpur and Jhalokathi districts, respectively. Near each hybrid rice field, BRRI dhan28 and BRRI dhan29 were also transplanted. The varieties BRRI dhan28 and BRRI dhan29 were used as check varieties for IR68877H and IR69690H, respectively. The performance of IR69690H was better than that of IR68877H. The grain yield of IR68877H varied between 6.5 and 9.30 t ha ha-1 with an average yield of 7.85 t ha ha-1 over the locations and that of IR69690H, it was 7.26 to 9.56 t ha ha-1 with an average of 8.25 t ha ha-1 . The average yield advantage of IR68877H over the check variety BRRI dhan28 was 1.41 t ha ha-1 and that of IR69690H over BRRI dhan29 was 1.51 t ha ha-1 . Great variations on grain yield were observed among the sites. The locations Babuganj and Bagerhat were the most productive, whereas the site Mothbaria was the least productive. Majority of the farmers preferred IR69690H, which was later released as hybrid rice variety named as BRRI hybrid dhan1 for Jessore and Barisal region. The farmers chose this line mainly due to its higher yield potential, larger panicle size, low shattering tendency of grain and good appearance.