众所周知,当照射处于 G_1期的细胞时,发生的畸变多半是染色体型的。这一点已在蚕豆、中国绢鼠细胞和豌豆、人的白血球和淋巴细胞、还阳参和大麦上得到了证实。在上述多数工作中,当照射 G_1期细胞时看到的是一定数量的染色单体型交换畸变。还阳参的试验证明,DNA 合成时期和畸变型之间没有明显的相关性,表明染色体辐射损伤的最终状态是原发损伤后一系列变化的结果。 It is well known that most of the aberrations that occur when cells in G_1 are irradiated are chromosomal. This has been confirmed in broad bean, Chinese silkworm mouse and pea, human white blood cells and lymphocytes, but also in sunburst and barley. In most of the above work, a certain number of chromatid exchange aberrations are seen when G 1 cells are irradiated. Yang also test the test proved that there is no significant correlation between DNA synthesis and aberrations, indicating that the final state of chromosome radiation damage is a series of changes after the primary injury results.