南朝鲜于60年代后期,根据本地区气侯特点,将水稻育种工作从粳稻为主转向以籼稻血统为主的籼粳杂交。在国际水稻所的协助下,1971年从 IR667(Ir8//Yukara/TN_1)杂交组合中育成了第一个籼粳交品种——统一,产量比一般粳型品种高30％,1972年推广种植270万亩,占水稻总面积的16％。此后针对该品种米质 In the late 1960s, South Korea shifted its rice breeding work from japonica rice to indica-japonica crossings, which mainly comprised indica lines, according to the climate characteristics in the region. With the assistance of the International Rice Institute, the first indica-japonica hybrid was developed in 1971 from the IR667 (Ir8 // Yukara / TN_1) cross combination, yielding 30% more than the average japonica variety. In 1972, 270 mu, accounting for 16% of the total rice area. Since then the quality of the variety of rice