据报道,中等规模的杂交计划每年要做杂交组合100个以上。国际水稻研究所每年做的杂交组合更多,达5000来个。这对育种工作者来说,是一个非常繁重的任务。特别是在杂交期间遇上不良气候条件,杂交计划很难完成。为了提高杂交工效,搞好杂交育种,我们从1980年起进行了改进水稻杂交技 It is reported that medium-sized hybrids plan to do more than 100 hybrid combinations each year. The International Rice Research Institute makes more hybrid combinations each year, reaching 5,000. This is a very heavy task for breeders. Especially in the hybrid during the encounter adverse climatic conditions, hybrid programs is difficult to complete. In order to improve the efficiency of hybridization and improve hybrid breeding, we have carried out the improvement of hybrid rice technology since 1980