Effect of Water Stress on Physiological Traits and Yield In Rice Backcross Lines after Anthesis

Under the water stress, the physiological metabolism process changed a lot. In this paper, some physiological traits were analyzed, which has been closely related to rice yield. Some rice backcross lines with drought resistance were discussed, and the effect of water stress after anthesis on rice yield was studied under the artificial control condition. The result indicated the content of malondiadehyde (MDA) of rice flag leaf increased obviously, the activity of superoxide dismatase (SOD) of rice flag leaf activity weakened; the various traits of the rice variety with strong drought resistance reduced slightly compared to control and with high yield, while of the rice variety with weak drought resistance reduced significantly compared to control and with low yield.