目前,用于杂交稻制种的母本大多是生理机能失调的野败型细胞质雄性不育系,这种不育系开花时间长,且柱头外露率高,颖壳吻合不好,导致细菌和真菌容易侵入,因而使得生产出来的杂交稻种内部菌源较多。同时,由于高剂量九二○等农用激 At present, most of the female parent lines used for hybrid rice seed production are wild-type cytoplasmic male sterile lines with physiological dysfunction. Such male sterile lines have a long flowering time with high stigma exsertion rate and poorly matched glume shells, resulting in bacterial and Fungi easily invaded, resulting in hybrid rice produced more bacteria within the source. At the same time, due to high doses of 920 and other agricultural shocks