ICoFAB2018 International Conference on Food, Agriculture and Biotechnology 140 Effect of Thai Jasmine Rice on the Fruiting Body Growth of Cordyceps militaris Surachai Rattanasuk 1, *, Suphanida Lunpui 2 , Wanwipa Lunpui 2 and Nopphasul Sirijant 1 1 Major of General Science, Department of Science and Technology, Faculty of Liberal Arts and Science, Roi Et Rajabhat University, Roi Et, 45120 Thailand 2 Major of Biology, Department of Science and Technology, Faculty of Liberal Arts and Science, Roi Et Rajabhat University, Roi Et, 45120 Thailand * Corresponding author: surachai_med@hotmail.com Abstract Cordyceps militaris is a potential source of pharmacological activities including anti- inflammatory, anti-oxidant, anti-aging, anti-tumor, anti-cancer and anti-leukemic. Rice was used as carbon source and mixed with C. militaris culture media. The aim of this research was to study the effect of Thai jasmine rice on the fruiting body growth of C. militaris. Thai jasmine rice and Sangyod brown rice (control) were mixed with C. militaris culture media in glass bottle and sterilized for 30 min before used. Five milliliters of C. militaris liquid culture were inoculated into sterilized glass bottle containing rice and C. militaris culture media and incubated in the dark at 22 o C for 7 days, under light at 18 o C for 7 day and continued at 22 o C for 60 days. Fresh C. militaris fruiting body was cut from glass bottle, weighted and dried at 50 o C for 8 hr. The results found that average weight of fresh C. militaris fruiting body obtained from Thai jasmine rice (20.84 + 0.29 g/bottle) was higher than that from Sangyod brown rice (6.26 + 0.26 g/bottle). Cordycepin in C. militaris fruiting body obtained from Thai jasmine rice was determined using High-Performance Liquid Chromatography and higher than that obtained from Sangyod brown rice at 4080 mg/kg. Thai jasmine rice is an alternative substrate instead of Sangyod brown rice for C. militaris to reduce the cost of production. Keywords: Thai jasmine rice, Sangyod brown rice, fruiting body, Cordyceps militaris