Two modern photoperiod-sensitive rice varieties for Bangladesh.
1989
Kabir M.A. | Miah N.M.
BRRI [Bangladesh Rice Research Institute, Gazipur, Bangladesh] recently released modern photoperiod-sensitive varieties BR22 and BR23 for T. aman season in Bangladesh. BR22 was developed form Nizer sail/BR51-46-5; BR23 was derived from DA29/BR4. Both varieties are suitable for late planting in T. aman. Yield potential and disease reactions are comparable to those of existing modern varieties, but the new varieties yield higher in late plantings. BR22 has medium bold grain with intermediate amylose content and moderate resistance to tungro (RTV), bacterial leaf blight, sheath rot, sheath blight (ShB), and blast. BR23 has long slender grain with intermediate amylose content and moderate resistance to RTV, stem rot, ShB, and submergence tolerance.
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