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籼粳杂交 F_1 结实率低(1～35%),后代分离严重,而持续世代长(8～12代)。虽然有人试图用复交、回交等方法及其他手段克服这方面的障碍,但进展缓慢。国外有人把光叶的非洲栽培稻(O.Glaberr-ma)种质引入到亚洲栽培稻(O.Sativa)中,试图育成耐寒、抗病的新品种。国内,云南等省的兄弟单位也在研究光叶水稻种质资源的利用。1972年春季,我们利用光叶籼稻“兰勃兰特”作母本,用“矮55”粳稻作父本配组,当年秋季 F_1 结
The seed setting rate of F1 between indica and japonica hybrids was low (1 ~ 35%), and the offspring segregated severely, which persisted for generations (8-12 generations). Although some people are trying to overcome the obstacles in this respect by such methods as the resignation and the backcrossing, and other measures, their progress has been slow. Some people from abroad introduced the O. glaberr-ma germplasm of Guangye into O.Sativa in order to breed a new cold-tolerant and disease-resistant variety. Brothers units in China, Yunnan and other provinces are also studying the utilization of germplasm resources in Guangye Rice. In the spring of 1972, we used the light Indica rice “Lambert” as the female parent and “Dwarf 55” japonica rice as the male parent with the autumn F_1 knot