Rice is the most important agricultural crops in Vietnam. In recent years, increasingly rice export of our country is developing. At the same time, demand for good quality rice in domestic market is also increasing. In fact, rice exporting price of Vietnam in the world market was lower than that of Thailand, India, and the United states of America due to not good quality of our rice. Aroma of rice is highly appreciated by consumes. Some our typical rice varieties as Támthơm, Nếp cái hoa vàng, Dự hương, Chợ đào, etc. express very good quality, soft, aromatic, and high nutrition value. However, typical rice varieties express also disadvantages as long growth duration, photoperiod sensitive, low grain yield, weak stem, and susceptible to pests and diseases. Our research result showed that aroma was not found in stem, leaf, and grain of AS-996, OM-2665, KD, and CR203. In DT122, CM6, D21, Jasmine 85, and Dragon Eyeball 100, aroma was found in stem, leaf, and grain not root. Level of aroma in DT21, DT122, CM6, Jasmine 85, and Eyeball 100 express different. In which, level of aroma in CM6, Dragon Eyeball 100, and Jasmine 85 is higher comparing to DT21 and DT122. Aroma in DT122, DT21is controlled by one pair of recessive gene. Meanwhile, aroma in CM6 and Dragon Eyeball 100 is controlled by two pair of recessive genes, which are suitable to Mendelian law. Perhaps, activity of genes controlled aroma in CM6 and Dragon Eyeball 100 by additional efect. Research on allelic relationship pointed out that one common gene controlled aroma in DT122, CM6, DT21, Jasmine 85, and Dragon Eyeball 100. In this research, we acknowledge the financial and technical support of the International Atomic Energy Agency (IAEA) via Project VIE/5/014, Research Contract 12237/Regular Budget Fund (RBF) and Vietnam Atomic Energy Commission (VAEC). We would also like to acknowledge the support from Dr. Karin Nichterlein, Dr. Stephan Nielen Dr. Rayard Kamel from IAEA, and Dr. Brigitte Courtois from CIRAD-Biotrop, France.
Lam Quang Du, Dao Thi Thanh Bang, Nguyen Huu Dong,
Nghien Thi Nhan, To Anh Tuan, Le Thi Lieu et al
Institute of Agricultural Genetics