Performance of rice hybrids deriver from some cytoplasmic male sterile (CMS) lines.

Experiments to evaluate the performance of some rice hybrids derived from some sytoplasmic male sterile lines were conducted in Sukamandi experiment station in the dry-season 1990, wet-sea-son 1990/1991, and wet-season 1992/93 using Randomized Complete Block Design. The results indicated that in the dry-season 1990, five hybrids: Tondano A/IR29512, Tondano A/IR25912, Tondano A/Sadang, Tondano A.Cimanuk and Tondano A/M66b yiulded 6.38; 6,33; 6.26; 6.19 t/ha, respectively, higher than IR64 (6.05 t/ha), with standard heterosis ranged from 2.3 to 5.5 percent. In the wet-season 1990/1991 all of hybrids tested yielded lower than IR64 (6.45 t/ha). Meanwhile, in the wetseason 1992/93, all of hybrids tested yielded higher than IR64 (2.46 t/ha). Bambang Sutaryo and Bambang Suprihatno; Spat Peneliti pada Balittan Sukamandi