一、材料及方法 1978年开始研究籼粳杂交,当年用8个籼稻品种与科情三号在温室杂交14个组合,当年冬季将这14个组合的杂种均以76—1303为父本进行复交,共26穗,得205粒复交种子,1979年夏季及冬季分两次种植,得F_1147株。1979年冬和1980年夏种F_2,以后一直到1987年,主要是夏季在田里,有时冬季也利用温室,连续种植,已到F_8—F_10代。 I. MATERIALS AND METHODS The research on indica-japonica hybridization began in 1978 when 14 combinations of 8 indica rice varieties and No. 3 were crossed in the greenhouse. In the winter, 14 hybrids of these 14 combinations were resumed with the parents of 76-1303 , A total of 26 spike, get 205 seeds of complex, in 1979 summer and winter planting twice, have F_1147 strains. F_8-F_10 was planted in the winter of 1979 and the summer of 1980, then until 1987, mainly in summer in the fields, and sometimes in winter, using greenhouses and planting continuously.