Induction of multi-karyotypes and genome stability in Zebrina pendula (2n=23) after irradiation of X-rays

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概要

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• Karyotypes of 8M+5A+7T+2f, 8M+4A+8T+2f and 8M+3A+9T+3f for Zebrina pendula were induced and established from the parental karyotype of 7M+5A+9T+2f (2n=23) by irradiation of X-rays during the course of study. Those new karyotypes seemed to be basically produced by adding M (metacentric chromosome). Centric fissions of M- and f- (fragment) chromosomes were observed here for the first time. 2A- (acrocentric) chromosomes were established by reciplocal translocations between two arms of M-chromosomes and two little arms of fchromosome and disappearance of a M-chromosome. A centric fission firstly occurred synthesized decrease of M-chromosomes, production of A- and T-chromosomes and then, karyotype display of 5M+8A+10T at the appearance frequency of 7.5%, originally seen in the wild type of Z. pendula 23-plant. However, below 5M-chromosomes were not shown in any individual plant and thus, the volume of 5M-chromosomes seemed to be the downward limit of the genome securitystabilization. Some individual plants of Z. pendula showed some variants such as thin leaves, glossy leaves and albino leaves.

• 財団法人染色体学会の論文

著者

• FUJIKAWA Kazuo

  Department of Life Science, Faculty of Science and Technology, Kinki University

• ITOH Tetsuo

  Atomic Energy Research Institute, Kinki University

• Fujikawa K

  Department Of Life Science Faculty Of Science And Technology Kinki University

• Fujikawa K

  Kinki Univ. Higashi‐osaka Jpn

• Fujikawa K

  Faculty Of Science And Engineering Kinki University

• FUJIKAWA Kazuo

  Atomic Energy Res. Inst. Kinki Univ.

• Itoh Tetsuo

  広島大学 工学研究科機械システム工学専攻

• Itoh Tetsuo

  Atomic Energy Research Institute Kinki University

• Itoh T

  Atomic Energy Research Institute Kinki University

• YONEZAWA Yoshihiko

  Department of Biology, Naruto University of Education

• Shigenobu Youji

  Graduate School of Human Life Science ; and Department of Environmental Sciences, Faculty of Human D

• Manabe Terumi

  Arita Gardening Farm

• Imanaka Tetsuji

  Res. Reactor Inst. Kyoto Univ.

• Shigenobu Y

  Graduate School Of Human Life Science ; And Department Of Environmental Sciences Faculty Of Human De

• Yonezawa Yoshihiko

  Department Of Biology Naruto University Of Education

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