体細胞分裂に見られる,減数分裂におけると類似の染色体行動〔英文〕

概要

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In order to bridge the genetical requirements to the cytological understandings on the behaviours of somatic chromosomes, followings were subjected in the present works: a) whether or not somatic chromosomes are under the control of some tying force during the mitotic cycle, b) whether or not homologous chromosomes become intimate sometime in mitosis, and c) whether the concept of half-chromatid structure is applicable on early anaphase chromatids under the light microscope.Root-tips of Crepis capillaris and young endopserm tissues of Aegilops squarrosa were mainly used.Chromosomes were found orientated at their kinetochore regions throughout prophase, and homologous chromosomes were found in "side-by-side" arrangement throughout the cell generations. Association of homologous chromosomes was found in late telophase of mitosis in Crepis capillaris. The double structure of mitotic anaphase chromatids was clearly observed in Crepis.From above observations, little "free wandering" of individual chromosomes throughout mitotic cycle, and the presence of the intimate period of homologous chromosomes prior to the DNA replication were considered to be reasonable. The possibility of the occurrence of recombinations and aberrant gene reproductions through mitosis were simultaneously discussed.
日本遺伝学会の論文