High-yield seed production techniques of two line super hybrid rice Zhunliangyou 1202

Zhunliangyou 1202 is a two line super hybrid rice combination which was bred with indica TGMS line Zhun S and restorer line R1202,and it was certified and registered by Guangxi Committee for Crop Variety Registration in 2007.According to the characteristics of parents,it suggested that the rice field in autumn of seed production of Zhunliangyou 1202 was selected at the south of north latitude 24° and below 300m of altitude.The sowing gap stage of parents was reasonably arranged to ensure the flowering period agreement,and the high-yield population structure of parents should be cultivated,GA-3 should be timely and suitably sprayed to increase the outcrossing rate,the control of disease and insect pests should be done,impurity and bad quality seed should be removed to ensure the seed purity.Through applying these measures,the yield of seed production reached 3.0 t/hm2,and the seed purity was over 98%.