在杂交水稻制种或繁殖不育系中,往往出现因来自不同季别的同一不育系、保持系或恢复系,在同一播插期中而抽穗开花期相差很大的现象,以致造成花期不遇,严重影响制种、繁殖的产量。这究竟是个别亲本的特殊现象,还是所有亲本的共性?有哪些规律?为此作者于1984、1985年选用当前大面 In the hybrid rice breeding or breeding of sterile lines, often due to different seasons from the same sterile line, maintainer or restorer line, in the same sowing and heading and flowering period vary greatly, resulting in flowering not met , Seriously affecting seed production, breeding output. What is the special phenomenon of individual parents, or the commonality of all parents? What are the rules? For this author in 1984, 1985 use the current large