“加倍78”是我院科研组单倍体育种研究小组与后季稻常规杂交组共同培育的。1974年利用69—5×(69—3×红旗一号)F_2的杂交材料,进行花粉培养,当年获得了单倍体的花粉植株,75年经过秋水仙素处理,得到人工加倍的双倍体植株,结了少量种子,即于1975年冬利用温室繁殖种子,于1976年参加早粳小品系观察比较试验,小区亩产超过800斤,经县、院领导及各种子场专业人员一致评选为早粳新品系。当年8月就去广西秋繁,再 “Doubled 78” is our group research group haploid breeding research group and later season rice common cross breeding. In 1974, the hybrids of 69-5 × (69-3 × Hongqi No.1) hybrids were used for pollen culture. In the same year, haploid pollen plants were obtained. After 75 years of colchicine treatment, doubled diploid plants Plants, a small amount of seeds, that is, the winter of 1975 the use of greenhouse seed breeding, in early 1976 to participate in the observation and comparative trials of small lines, small plots per mu than 800 pounds, by the county, hospital leaders and various sub-field professionals unanimously selected For early japonica new line. In August that year went to Guangxi Fanfan, and then