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Chromosoma

, Volume 60, Issue 3, pp 205–221 | Cite as

The transformation of the synaptonemal complex into the “elimination chromatin” in Bombyx mori oocytes

  • Søren Wilken Rasmussen
Article

Abstract

In Bombyx mori oocytes the synaptonemal complexes are retained in modified form from pachytene to metaphase I. At the end of pachytene the length and width of the lateral components of the complex increase, whereafter the complexes become compacted during later stages of the meiotic prophase. Ultimately, at metaphase I the modified synaptonemal complexes of individual bivalents fuse to form a more or less continuous sheet between the homologous chromosomes. This sheet corresponds to the structure historically known as the “elimination chromatin”. It is concluded that in the absence of crossing over and chiasma formation in Bombyx mori females the retainment and subsequent modification of the synaptonemal complex has evolved as a substitute mechanism to ensure regular disjunction of the bivalents.

Keywords

Developmental Biology Modify Form Homologous Chromosome Lateral Component Synaptonemal Complex 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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References

  1. Bauer, H.: Die wachsenden Oocytenkerne einiger Insekten in ihrem Verhalten zur Nuklealfärbung. Z. Zellforsch. 18, 253–298 (1933)Google Scholar
  2. Gassner, G.: Synaptinemal complexes in the achiasmatic spermatogenesis of Bolbe nigra Giglio-Tos (Mantoidea). Chromosoma (Berl.) 26, 22–34 (1969)Google Scholar
  3. Gillies, C.B.: Reconstruction of the Neurospora crassa pachytene karyotype from serial sections of synaptonemal complexes. Chromosoma (Berl.) 36, 119–130 (1972)CrossRefGoogle Scholar
  4. Gillies, C.B.: Synaptonemal complex and chromosome structure. Ann. Rev. Genet. 9, 91–110 (1975)PubMedGoogle Scholar
  5. Henking, H.: Die ersten Entwicklungsvorgänge im Fliegenei. Z. wiss. Zool. 46, 289–336 (1888)Google Scholar
  6. Henking, H.: Untersuchungen über die ersten Entwicklungsvorgänge in den Eiern der Insekten. I. Das Ei von Pieris brassica L. Z. wiss. Zool. 49, 503–564 (1890)Google Scholar
  7. Henking, H.: Untersuchungen über die ersten Entwicklungsvorgänge in den Eiern der Insekten. Z. wiss. Zool. 54, 1–274 (1892)Google Scholar
  8. Kawaguchi, E.: Zytologische Untersuchungen am Seidenspinner und seinen Verwandten. I. Gametogenese von Bombyx mori L. und Bombyx mandarina M. und ihrer Bastarde. Z. Zellforsch. 7, 519–549 (1928)Google Scholar
  9. Maeda, T.: Chiasma studies in the silkworm, Bombyx mori L. Japanese J. Genet. 15, 118–127 (1939)Google Scholar
  10. Rasmussen, S.W.: The meiotic prophase in Bombyx mori females analyzed by three-dimensional reconstructions of synaptonemal complexes. Chromosoma (Berl.) 54, 245–293 (1976)CrossRefGoogle Scholar
  11. Rasmussen, S.W.: Meiosis in Bombyx mori females. Phil. Trans. roy. Soc. (Lond.) B, 277, 161–168 (1977)Google Scholar
  12. Ris, H., Kleinfeld, R.: Cytochemical studies on the chromatin elimination in Solenobia (Lepidoptera). Chromosoma (Berl.) 5, 363–371 (1952)Google Scholar
  13. Schäffer, K.: Zur Diagnose der Eliminationssubstanz der Eireifung von Schmetterlingen (Solenobia). Rev. suisse Zool. 51, 437–441 (1944)Google Scholar
  14. Seiler, J.: Das Verhalten der Geschlechtschromosomen bei Lepidopteren. Arch. Zellforsch. 13, 160–269 (1914)Google Scholar
  15. Seiler, J.: Geschlechtschromosomen-Untersuchungen an Psychiden. IV. Die Parthenogenese der Psychiden. Z. indukt. Abstamm.-Vererbungsl. 31, 1–99 (1923)Google Scholar
  16. Sorsa, M., Suomalainen, E.: Electron microscopy of chromatin elimination in Cidaria (Lepidoptera). Hereditas (Lund) 80, 35–40 (1975)Google Scholar
  17. Sturtevant, A.H.: No crossing over in the female of the silkworm moth. Amer. Naturalist 49, 42–44 (1915)Google Scholar
  18. Vereiskaya, V.N.: A cytochemical study of the elimination chromatin in the silkworm (Bombyx mori) meiosis. Tsitologia (Moscow) 17, 603–606 (1975)Google Scholar
  19. Welsch, B.: Synaptonemal Complex und Chromosomenstruktur in der achiasmatischen Spermatogenese von Panorpa communis (Mecoptera). Chromosoma (Berl.) 43, 19–74 (1973)Google Scholar
  20. Westergaard, M., Wertstein, D. von: The synaptinemal complex. Ann. Rev. Genet. 6, 71–110 (1972)PubMedGoogle Scholar

Copyright information

© Springer-Verlag 1977

Authors and Affiliations

  • Søren Wilken Rasmussen
    • 1
    • 2
  1. 1.Department of PhysiologyCarlsberg LaboratoryCopenhagenDenmark
  2. 2.Institute of Developmental BiologyAcademy of Sciences USSRMoscow

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