Induksi Mutasi Kromosom Dengan Iradiasi Sinar Gamma Cobalt 60 Untuk Merakit Padi (Oryza sativa) Tahan Kekeringan Secara In Vitro

A lot of people in the world choose rice as their main source carbohydrate beside maize and wheat. The increasing population make demand. Increasing demand doesn’t followed by supply. In order to solve that problem, researcher try find a new paddy cultivar which is can be planted dry area. This research aims study osmotic pressure still accepted var. Sintanur, LD50 (lethal dose 50) value especially Sintanur interaction between irradiation pressure. this research, irradiated gamma ray Cobalt60 at six dosages 0 Gy, 100 200 300 400 500 Gy. Then each seed four kind mediums contains Polyethylene glycol (PEG) levels concentration are I0 (0 g/l PEG), I1 (116,538 I2 (174,6 PEG) I3 (219,547 PEG). Based on data analyzed, highest PEG for drought tolerant selection 174,674 PEG. There an medium influencing plant height shoot multiplication. LD 50 375 Gy.
 
 Keyword: paddy, cobalt60, tolerant,