Abstract:The effed of radiation in Astragalus adsurgens Pall had been discused concerning chromosome aberration,field germinaton,seedling height,dominant mutation of M1 and morphological mutation of M2 in this paper.Ex-perimentd results indicated that seedling height and field germination decreased while chromosome aerration and frequency of micronucleus increased with increasing radiation dose.There was a close correlation between the morphological mutation of M2 and radiation dose.The radiosensitivity of different varieties was apparently different.Dominant mutation had been found in M1 generation.Early-maturing mutant flowered 45 days earlier than the control.