摘要： 为探讨空间条件对水稻育种的影响,利用返回式卫星搭载水稻干种子,返地种植，考察分析了12个亲本品种后代的性状表现及遗传与变异情况。结果表明：空间条件诱变的后代性状具有多样性变异和多向性遗传，且能稳定遗传，并有超亲遗传现象，诱变后代具有变异类型多、变异频率高、特殊突变体、育种周期短等特点。为进一步开发利用空间技术育种，在研究实践的基础上，提出了程序化、规范化、可操作性强的水稻空间育种技术规范。
Abstract:In order to inquire into the influences of space conditions on rice breeding,the dry seeds of 12 rice varieties were carried by recoverable satellite.After recovery,these seeds were sowed in the yield,the inheritance and variation of the characters of their progenies were observed and analysed.The results showed that the characters of the progenies mutated under space conditions segregated and varied in many adpects and directions,and the segregated and varied characters were heritable.These progenies posoessed significant transgressive inheritance,a plenty of variation types.and variation.was characterized by short breeding period.The resulfs in this study indicated that space technology breeding could be developed and used as a new method of mutation breeding.