The rate of the chromosome aberration in cells was characterized by starting at a much higher level and rising more rapidlly in the preceding 15 subcultures as compared with the control.

• 用混倍性变异体作外植体培养时,细胞水平染色体数量畸变具有起点高和前15代增长快的特点,同工酶变异率比正常有显著增加。