Abstract: Dry seeds of Lactuca indica in aerospace flight (AF) were irradiated with different doses of ⁶⁰Co-γ rays and were used to compare and analyze seven main feeding characters and quality traits in the M1 of L. indica. There were significant differences in the rate of germination, germination potential, height, yield, crude fiber, and crude protein (P<0.05) without crude fat. The rate of germination was significantly correlated with germination potential and yield (P<0.05). The height was significantly correlated with crude fat and crude protein (P<0.05). The yield was significantly correlated with crude fat (P<0.05). The results of principal component analysis showed that the cumulative ratio of contribution of 86.446 1% comes from plant yield factors and plant quality factors. The results showed that use of AF and 20 Gy of ⁶⁰Co-γ rays treatment is important because it is a better way to cultivate new varieties.