水稻雄性不育系的异交结实率一般还较低。如何提高杂交水稻繁殖田和制种田的异交结实率?我们认为除安排好父母本的花期,搞好栽培和人工辅助授粉外,开花时尚可采取下面三个补助方法。割叶。在不育系主穗刚抽出、分蘖穗大部分剑叶出齐时,割去不育系的上部叶子。这样可以大大减少不育系接受外界花粉的障 Outcrossing rates of male sterile lines in rice are generally lower. How to improve the outcrossing rate of hybrid rice breeding field and farming? We believe that in addition to arranging the flowering of parents, good cultivation and artificial pollination, flowering fashion can take the following three subsidies. Cut the leaves. In male sterile line main spike just out, most of the tiller spike spike out of alignment, the upper leaves of the sterile line. This can greatly reduce the male sterile line to accept the pollen barrier