Journal of Life Science (생명과학회지)

Korean Society of Life Science (한국생명과학회)
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Application of G- anad C-banding Techniques for Chromosome Analysis Using Testis of Mouse

Mouse의 정소이용 염색체 조사에 G- 및 C-banding법의 적용

  • 최영현 (미국 국립암연구소) ;
  • 권용원 (부산대학교 자연과학대학 생물학과) ;
  • 윤희선 (부산대학교 자연과학대학 생물학과) ;
  • 유미애 (부산대학교 분자생물학과) ;
  • 이원호 (부산대학교 자연과학대학 생물학과)
  • Published : 1998.02.01
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Abstract

The mototic and meiotic chromosomal characteristics of ICR mice were investigated with G-and C-banding techniques. For the puposes, the chromosomal preparations were made with the modified air-drying method of Imal et al. Chromosomal analysis using testis could be observed mitotic as well as meitotic chromosomal behaviors, and the centromeric regions of all chromosomes including X chromosome were strongly stained in C-banded preparations. Nineteen autosomal bivalents and a single uniequal terminally associated X-Y bivalent in normal cells were observed during the late prophase and the metaphase of the meiosis I. The mean frequencies of previously dissociated X-Y chromosomes in the primary apermatocytes of the control group were 7.45%, but the frequencies of X-Y dissociation in the alkylating agents-treated group were about 3-4 times higher than that in the control group. Application of C-banding in meiotic stages could be certainly distinguish between vibalent type and univalents type of sex chromosomes.

G- 및 C-banding법에 의한 ICR 생쥐의 유사분열과 감수분열 시기의 염색체 특징에 관하여 조사하였다. 이를 위한 염색체 표본 작성은 Imai et al.의 공기건조법을 다소 변형한 방법에 의하였다. 정소를 이용한 염색체 분석은 유사분열뿐만 아니라 감수분열단계들을 모두 관찰할 수 있었으며, C-banding에 의하여 X 염색체를 포함한 모든 염색체의 돈원체 부위가 강하게 염색되었다. 정상의 제 1 감수분열 전기와 중기 사이의 세포들에서 2가 염색체로 된 19쌍의 상염색체과 1개의 말단결합으로 된X-Y 염색체를 관찰할 수 있었다. 대조군의 제 1 정모세포에서 조기분리된 성염색체를 가지는 세포의 빈도는 약 7.45%였으나,alkylating agents 처리군에서는 대조군에서보다 약 3-4배 이상 높에 나타났다. 그리고 감수분열 단계의 염색체 표본에 C-banding을 적용함으로서 X-Y 염색체 조기분리의 관찰이 매우 용이하였다.

Keywords

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