オオムギ染色体の行動 : I.体細胞分裂中期における相同染色体の位置

DOI Web Site

書誌事項

タイトル別名
  • The Behavior of Chromosomes in Barley : I. Non-Random Movement during Mitotic Cycle

抄録

By using the Giemsa C-banding technique, chromosomes in the root meristematic cells of barley (Hordeum vulgare L., cultivar Ehimehadaka No.1, 2n=14) were stained. The C-bands, which reveal the presence of constitutive heterochromatins, mostly localized on the proximal regions of the chromosomes. By the differences in morphology and C-banding pattern among chromosomes, all seven pairs of homologous chromosomes in the same cell could be identified. Furthermore, the chromosomes were divided into two groups. Three pairs (chromosomes 3, 4 and 7) had thick bands and the other four pairs (chromosomes 1, 2, 5 and 6) had thin bands. By using these characteristics of the chromosomes, the behavior of chromosomes during mitotic cycle was investigated. In the early prophase, all chromosomes had 'V' shape and their vertices, i. e. centromeres, were gathered to one pole of nucleus and arms were streched towards the opposite pole. This observation suggests that the chromosomes do not move randomly in the interphase nucleus after the telophase of preceding mitotic division. This interpretation is supported by the finding that the chromocenters, which are corresponded to C-bands on chromosomes, were distributed on one side of the surface of interphase nucleus.

収録刊行物

詳細情報 詳細情報について

問題の指摘

ページトップへ