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2.再分化植株的染色体变异再分化植株的染色体组成与愈伤组织的染色体组成一样,也是受植物种类、培养时间、愈伤组织的再分化方式和再分化培养基组成等因素的影响面有各种各样的变化。根据再分化植株染色体组成的类型简单地分为:(1)、2倍体,(2)、倍数体和非整倍体;(3)、染色体数的嵌合体三种类型。 (1)2倍体尽管愈伤组织的整倍性和非整倍性细胞都有存在,但对葫萝卜、麦类、高梁等作物而言,再分化植株的大部分则维持原来染色体的2倍体(D′AMATO 1978),另外,在来自原生质体的再分化植株中得到2倍体的报导也不少(B_(ASKS)和E_(VANS)1976,G_(AM)—
2. Chromosome Variation in Re-Differentiated Plants The chromosomal composition of the re-differentiated plants is the same as that of the callus, and is affected by plant species, culture time, redifferentiation of callus, and composition of the re-differentiation medium Various changes. According to the type of chromosome composition of the redifferentiated plants simply divided into: (1), 2-fold, (2), fold and aneuploidy; (3), Chromosome number of chimera three types. (1) Diploid Although callus aneuploidy and aneuploidy cells are present, most of the redistributed plants maintain the original chromosome 2 for cucurbits, wheat, sorghum and other crops (D’AMATO 1978). In addition, there were also reports of diploid doublings from protoplasts (B ASKS and E VANS 1976, G AM-