杂交稻种是由不育系做母本,恢复系做父本杂交获得的。不育系雄花败育,只有得到外界花粉才能结实。所以,在制种田中不育系的结实率很低,一般在30～40％,每穗着粒30～40粒。由于它结实少,每个可实粒的营养源比自交的稻株就丰富得多,表现灌浆快,籽粒饱满。没有得到外界 The hybrid rice is obtained from the sterile line as the female parent and the restorer line as the male parent. Male sterile male sterile, only to get outside pollen to be strong. Therefore, the system of sterile lines in the system of seed setting rate is very low, usually 30 to 40%, per panicle 30 to 40 tablets. Because of its low sturdiness, each nourishing grain source is much more abundant than the self-bred rice plant, showing a fast filling and a full grain. Did not get the outside world