Abstract: Jia1S, a photosensitive two-line male-sterile, middle-season indica line, was developed through systematic selection method by using Yiling P88S cross Hunong 3S, after 8 years /10 generations, a photosensitive plant was detected at 7^th generation low temperature at summer, again detected at 9^th generation regrowth, after back crossing with Ben15, a stable photosensitive two-line male sterile line was developed and named Jia1S. It has stable fertility, fertilizer tolerance, logging free, high outcross and match. It has great potential for makketing and agriculture industry.

Key words: hybrid rice, indica, photosensitive male-sterile line, breeding