一、引言自1895年发现 X——射线以来,辐射线对生物的作用,一直在研究。但电离射线应用于辐射育种则是20年代以来的事情,最早是1927年美国人穆勒(H·J·Muller)用果蝇做试验发现 X 射线能引起生物遗传性的变异。此后,人们开始有目的地辐射选育新品种。 I. INTRODUCTION Since the discovery of X-rays in 1895, the role of radiation in living organisms has been under study. However, ionizing radiation used in radiation breeding was the thing from the 1920s. The earliest was that American J. Muller test in 1927 found that X-ray can cause genetic heredity variation. Since then, people began to purposefully radish new varieties of breeding.