Gaoliangzhe (the progeny of a cross-breed of Chinese Sorghum with sugarcane) somatic clone seeds which had a space travel on board the “90105” scientific satellite were grown and observed throughout the growing poriod. It proves that the exposure of the seeds to cosmic rays under microgravity has produced apparent radiative effect on some agronomic characters as follows: (1) The “space travelled” seeds of clone plants 14-1, comparing with the control, show an increase in the percentage of germination, growing rate and plant height and grow in identity; (2) Both their biomass and grain yields are higher 27.34% and 38.82% than those of the control, respectively; the ear length, 1000-grain weight and the concontration of sugar have also increased. Thus, it seems promissing to apply space technology to the variety improving and radiation breeding of the crops and the bioengineering progenies.