| Symbol | Rht-B1b |
| Synonym | Rht1;Sd1[3599] |
| Name | Reduced height. GA-insensitive |
| Local | 4B[3599] |
| Linkage | |
| Origin | Norin-10. |
| Tester | T.aestivum:Frontier,Guardian,Siete-Cerros,Wren,WW-15. T.durum:Cocorit-71,Creso,Malavika,Mida,Sansone,Valgerardo,Valnova,Valselva[3599] |