Friebe B
Institut für Angewandte Genetik der Freien Universität Berlin, BRD.
Theor Appl Genet. 1976 Nov;47(6):275-83. doi: 10.1007/BF00281932.
Hypotheses for the mechanism of differential Giemsa staining of euchromatin and heterochromatin are discussed. The banding-patterns of Vicia faba, Allium cepa and Paeonia tenuifolia are described. Heterochromatic chromosome segments have been identified in metaphase chromosomes to correspond with those to be found in interphase nuclei. The fact that the number of chromocenters is usually smaller than the number of Giemsa bands in the metaphase chromosomes is supposed to be due to fusion of heterochromatic sections during interphase. Within each species non-homologous chromosomes exhibit similar patterns. The significance of this phenomenon, which has been called "aequilocal heterochromacy" by Heitz, is so far unknown.
本文讨论了常染色质和异染色质吉姆萨染色差异机制的假说。描述了蚕豆、洋葱和细叶芍药的带型。已在中期染色体中鉴定出异染色质染色体片段，其与间期核中发现的片段相对应。中期染色体中染色中心的数量通常少于吉姆萨带的数量，这一事实被认为是由于间期异染色质区段的融合所致。在每个物种内，非同源染色体表现出相似的模式。这种现象的意义，被海茨称为“等位点异染色质”，目前尚不清楚。
