前言日本从一九八一年起,计划用十五年时间育成比现有品种增产50％的超高产水稻品种。最初三年要求产量增产10％,到第八年要求增产30％,至一九九五年新育成品种比现有的增产50％。一九八一年育成的“中国91号”平均增产10％以上。国际水稻研究所曾立足于选育适应热带、亚热带,也能适应温带的具有广泛适应性的品种。从IR8直到刚投放不久的IR64,可作为杂交水稻的恢复系,却难以直接适应中国的生态条件,在大面积生产上发挥效果,即使IR36,也只能适应热带和亚热带低产区,难以直接在福建大 Foreword Since 1981, Japan plans to use 15 years to breed super-high-yielding rice varieties with a 50% increase over the existing varieties. The first three years require a 10% increase in output, a 30% increase in the eighth year and a 50% increase in newly grown varieties in 1995 over the existing crop. The “China 91” bred in 1981 gained more than 10% on average. The International Rice Research Institute has been based on the selection of adaptable tropical, subtropical, but also can adapt to the temperate with a wide range of adaptive varieties. From the IR8 to the IR64, which has just been put into operation, can be used as a restorer line for hybrid rice. However, it is difficult to directly adapt to China’s ecological conditions and exert its effect on large-scale production. Even IR36 can only adapt to tropical and subtropical low yield areas, making it difficult to directly In Fujian