DEVELOPMENT OF JAPONICA TYPE CYTOPLASMIC MALE STERILE (CMS) RICE LINES FOR COMMERCIAL HYBRID RICE IN MEDITERRANEAN ECOLOGICAL CONDITION

Hybrid rice has an average 15 % to 20 yield advantage over inbred lines. The availability of stable cytoplasmic male sterility system is vital for commercial hybrid rice. experiment was conducted develop japonica type CMS lines national varieties. National varieties were tested determine as maintainer, or restorer features via test cross. crosses made by using 19 and 21 1 line. All which are determined maintainer features. In addition to, 5 introduction adapted Mediterranean ecological condition breeding process. Two backcrossed 6 generations it developed similar agronomic 100% spikelet sterile For production Osmancik-97 Kiziltan, employed wild abortive V20A. Successive backcrossing succeeded produce completely Wild cytoplasm did not affect characteristic. Since one the most popular used a donor gene new varieties, WA-CMS Kiziltan will be useful breeding.