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经历过太空遨游的农作物种子,返回地面种植后,不仅植株明显增高、增粗,果型增大,产量比原来普遍增长,而且品质也大为提高。太空环境能对植物基因产生影响已得到科学家的证实,但对太空育种原理的解释仍有争议。科学家认为,太空育种主要是通过强辐射、微重力和高真空等太空综合环境因素诱发植物种子的基因变异而完成的。但究竟主要是哪些因素产生影响以及如何产生影响,至今
After returning to the ground for planting, the seeds of crops that have undergone space travel have not only markedly increased and thicken their plants, but also have increased their fruit types. Their yields have generally risen and their quality has greatly improved. The impact of space environment on plant genes has been confirmed by scientists, but the interpretation of the principle of space breeding is still controversial. Scientists believe that space breeding is accomplished mainly through the genetic variation induced by the comprehensive environmental factors such as strong radiation, microgravity and high vacuum in plant seeds. But what are the main factors that affect the impact and how it has so far