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

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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