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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○”等农用激素的使用,种子颖壳内胚乳淀粉质疏松,浸种时种子极易达到水分饱和,陈种或者是在收获前后遇上
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 poor glucosidosis, leading to bacteria and fungi Easy to invade, resulting in hybrid rice produced more bacteria within the source. At the same time, due to the high dose of “920” and other agricultural hormones used, seed glume endosperm amylopectin loose, seed soaking easy to reach water saturation, Chen species or before and after harvest encounter