Postreductional meiosis revealed in males of the mutant with chromosomal aberration “T(23; 25)Nd” of the silkworm, Bombyx mori

Yutaka Banno, Yutaka Kawaguchi, Katsumi Koga, Hiroshi Doira

研究成果: ジャーナルへの寄稿記事

4 引用 (Scopus)

抄録

The chromosome behaviors during meiotic division were investigated cytologically in the Bombyx mori strain bearing chromosomal aberration T(23;25)Nd, in which a reciprocal translocation fusing the chromosomes 23 and 25 occurred. The chromosome number (2n=55) in the hetelozygotes for T(23;25)Nd is one less than the normal number (2n=56) of B. mori. The primary spermatocytes in the hetelozygotes were found to have 27 chromosomes including an exceptionally large one, which may be constructed by 3 kinds of chromosomes, T(23;25)Nd, 23 and 25. In each of the secondary spermatocytes the chromosome number was 27. If the meiotic division is prereductional, the number of chromosome in the secondary spermatocytes should be 27 and 28 in a ratio of one to one. When the division is postreductional, the expected number is solely 27. The latter was found to be the case in all secondary spermatocytes, indicating that the male meiosis in this chromosomal mutant is postreductional.

元の言語英語
ページ(範囲)410-414
ページ数5
ジャーナルJournal of Sericultural Science of Japan
64
発行部数5
DOI
出版物ステータス出版済み - 1995

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Bombyx
chromosome aberrations
Meiosis
Bombyx mori
Chromosomes
silkworms
Aberrations
Chromosome Aberrations
meiosis
spermatocytes
Spermatocytes
chromosomes
mutants
chromosome number
reciprocal translocation
Bearings (structural)
Chromosomes, Human, Pair 3
Silkworm

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Polymers and Plastics

これを引用

Postreductional meiosis revealed in males of the mutant with chromosomal aberration “T(23; 25)Nd” of the silkworm, Bombyx mori. / Banno, Yutaka; Kawaguchi, Yutaka; Koga, Katsumi; Doira, Hiroshi.

:: Journal of Sericultural Science of Japan, 巻 64, 番号 5, 1995, p. 410-414.

研究成果: ジャーナルへの寄稿記事

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abstract = "The chromosome behaviors during meiotic division were investigated cytologically in the Bombyx mori strain bearing chromosomal aberration T(23;25)Nd, in which a reciprocal translocation fusing the chromosomes 23 and 25 occurred. The chromosome number (2n=55) in the hetelozygotes for T(23;25)Nd is one less than the normal number (2n=56) of B. mori. The primary spermatocytes in the hetelozygotes were found to have 27 chromosomes including an exceptionally large one, which may be constructed by 3 kinds of chromosomes, T(23;25)Nd, 23 and 25. In each of the secondary spermatocytes the chromosome number was 27. If the meiotic division is prereductional, the number of chromosome in the secondary spermatocytes should be 27 and 28 in a ratio of one to one. When the division is postreductional, the expected number is solely 27. The latter was found to be the case in all secondary spermatocytes, indicating that the male meiosis in this chromosomal mutant is postreductional.",
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AU - Kawaguchi, Yutaka

AU - Koga, Katsumi

AU - Doira, Hiroshi

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N2 - The chromosome behaviors during meiotic division were investigated cytologically in the Bombyx mori strain bearing chromosomal aberration T(23;25)Nd, in which a reciprocal translocation fusing the chromosomes 23 and 25 occurred. The chromosome number (2n=55) in the hetelozygotes for T(23;25)Nd is one less than the normal number (2n=56) of B. mori. The primary spermatocytes in the hetelozygotes were found to have 27 chromosomes including an exceptionally large one, which may be constructed by 3 kinds of chromosomes, T(23;25)Nd, 23 and 25. In each of the secondary spermatocytes the chromosome number was 27. If the meiotic division is prereductional, the number of chromosome in the secondary spermatocytes should be 27 and 28 in a ratio of one to one. When the division is postreductional, the expected number is solely 27. The latter was found to be the case in all secondary spermatocytes, indicating that the male meiosis in this chromosomal mutant is postreductional.

AB - The chromosome behaviors during meiotic division were investigated cytologically in the Bombyx mori strain bearing chromosomal aberration T(23;25)Nd, in which a reciprocal translocation fusing the chromosomes 23 and 25 occurred. The chromosome number (2n=55) in the hetelozygotes for T(23;25)Nd is one less than the normal number (2n=56) of B. mori. The primary spermatocytes in the hetelozygotes were found to have 27 chromosomes including an exceptionally large one, which may be constructed by 3 kinds of chromosomes, T(23;25)Nd, 23 and 25. In each of the secondary spermatocytes the chromosome number was 27. If the meiotic division is prereductional, the number of chromosome in the secondary spermatocytes should be 27 and 28 in a ratio of one to one. When the division is postreductional, the expected number is solely 27. The latter was found to be the case in all secondary spermatocytes, indicating that the male meiosis in this chromosomal mutant is postreductional.

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