The abnormal rate of chromosome number was highest inthe callus with seed embryo as explant,but the callus grewout no budor very few buds with abnormal bud shape.

• 以种胚为外植体的愈伤组织中染色体数目异常的频率最高,但愈伤组织不出芽或出芽量极少,且芽形态不正常。