Primary result of application of carbon ion beam and gamma ray for rice breeding improvement

Recently, Carbon ion beam have been recently attracted as mutagens. A characteristic feature of ion beams is their ability to deposit high energy on a target, densely and locally, as opposed to low linear energy transfer radiation such as gamma rays and X rays. In Vietnam, application of carbon ion beam just starting through cooperation FNCA between Japan and ASEAN countries from 2009. In this report, we want to report primary result of application carbon ion beam and gamma ray for rice breeding improvement of Khang dan 18. Through primary experimental for optimum dose for carbon ion beam we found that the dose of 40 and 60 Gy was suitable for Khang dan variety treatment. Based on optimum dose 40 and 60 Gy of carbon ion beam and 150 and 200 Gy of gamma ray we irradiated for Khang dan variety. The higher dose, the lower seed set ratio were determined both ion beam and gamma ray. Especial in carbon ion beam experiment at the dose of 60 Gy was 39.18% in small experiment and more than 20% seed set ratio at the real experiment. At M4 generation, in the experiment with carbon ion beam at the dose of 60 Gy we received mutant which increase the weight of 1000 seeds (23.0 g) compare to the control 19.7 g meanwhile experiment with gamma ray at the dose of 200 Gy we received some mutant not much change in the seed weight. This may show that carbon ion beam more effective than gamma ray in term of change some characteristics of rice. (author)