航天育种是一种新型的育种手段。
空间诱变育种(或航天育种)是航天技术与现代生物技术、常规育种技术相结合的新育种技术。
Space mutation breeding technique, a new breeding technique, incorporates spaceflight technique with modern biotechnological and traditional breeding technique.
本文综述了水稻航天育种的特点、理论依据及研究进展，讨论了水稻航天育种存在的问题和应用前景。
In this paper the theoretic foundations and progresses on space-flight breeding were summarized, the problems and application perspective of space-flight breeding were also discussed in rice breeding.
微生物是低等生物，遗传背景比较简单，一旦突变就会形成新的东西，这对航天育种研究有非常大的价值。
For microbial strain with simple genetic background, outer space conditions can make microorganism change into a new type, which is valuable for space breeding research.
人们通过常规杂交育种、辐射育种、组织培养育种、多倍体育种、航天育种等手段培育了大量的花卉新品种。
Breeders have bred a great deal of new flower varieties by taking routine cross breeding, radiation breeding, tissue culture breeding, polyploidy breeding, and spaceflight breeding etc.
国内外利用航天诱变育种技术培育了粮食作物、经济作物、花卉及抗生菌等高产优质新品种（系）。
A lot of new high-produced and well qualitative cereals, flowers and antibiotics have been bred by the technique of spaceflight mutation breeding home and abroad.
同时针对航天诱变的特点，进行了改进育种方法和提高诱变效果的研究。
In accordance with character of space mutation, improvement method of breeding and enhancing efficiency of breeding have been studied.
与常规育种相比，航天诱变育种具有诱变频率高、变异幅度大、育种周期短、有利突变体多等特点。
As compared with the conversational breeding, spaceflight mutation breeding is of high mutagenesis frequency, wide variation extent, short breeding period and more elite mutants, etc.
结果表明，航天玉金香基本保留了玉金香的优点；改进了玉金香网纹发生不稳定、果实偏小的缺点，达到了育种目标。
The variety maintained excellent features of Yujinxiang, while overcoming its shortcomings such as unstable netting and smaller fruit set.
结果表明，航天玉金香基本保留了玉金香的优点；改进了玉金香网纹发生不稳定、果实偏小的缺点，达到了育种目标。
The variety maintained excellent features of Yujinxiang, while overcoming its shortcomings such as unstable netting and smaller fruit set.
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