前言 尽管水稻的F1杂种有相当高的生产力(virmani和Edwards　1983),但杂交水稻除中国外仍然未能在大面积生产上应用。通过大量的人工辅助措施解决了制种问题后(Yuan和Lin 1980),杂交水稻己经成功地在中国各地区提高了水稻产量,但是,水稻雄性不育系的低结实率仍然是杂种大量生产 Introduction Despite the relatively high productivity of rice F1 hybrids (virmani and Edwards 1983), hybrid rice has not been applied in large-scale production except in China. After a lot of artificially assisted measures have been taken to solve the problem of seed production (Yuan and Lin 1980), hybrid rice has been successful in increasing rice production in all regions of China, but the low seed setting rate in male sterile lines of rice is still high in hybrids