杂交稻亲本花期相遇是否良好,是杂交制种产量高低的关键.由于杂交稻“三系”的温、光特性不同,生育期长短不一,加上不育系的开花习性与恢复系有差异,错期播种时间难以掌握,致使亲本花期不遇或相遇不良,根据几年来的试验.我们认为可采取下列办法使杂交稻亲本花期相遇. Hybrid rice parental flowering is good, is the key to the level of hybrid seed production due to the hybrid rice “three lines” different temperature and light characteristics, different growth stages, coupled with sterile flowering and restoring lines are different , The wrong sowing time is difficult to grasp, resulting in infrequent or poor parent flowering, according to several years of testing, we believe that the following methods can be used to meet the hybrid rice parents flowering.