分布于我国河北以南广大地区潮湿地带的假稻,形态特征酷似水稻,具有宿根性强,再生力和耐寒力强等特点,亦未发现其感染稻瘟病和纹枯病。短日照处理对假稻的幼憾分化和抽穗有明显的促进作用,其敏感的临界日照长度为14～15h。我们对栽培水稻与假稻进行了杂交,获得了杂交种和奇特的杂种苗,并对F_1代及F_2找进 Rice, distributed in moist areas of vast areas south of Hebei Province, resembles rice in morphological characteristics. It has the characteristics of strong perennial rooting, strong regenerative ability and cold resistance, and has not been found to be affected by rice blast and sheath blight. The short-day treatment significantly promoted the regrettable differentiation and heading of the paddy rice. The sensitive critical sunshine duration was 14-15h. We crossed the cultivated rice with the fake rice, obtained hybrids and exotic hybrid seedlings, and searched for F1 and F_2