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Reversion of XO to XY sex chromosome mechanism in a phasmid

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Summary

The sex chromosomes of the male phasmid Isagoras schraderi Rehn comprise an X and a Y, — each with a submedian kinetochore, and one euchromatic and one heterochromatic arm. At meiosis X and Y form an unequal sex bivalent in which the euchromatic arms are terminally associated. Relatively recent reversion from the XO-XX mechanism characteristic of the Phasmidae is indicated by the presence of the euchromatic arm in both X and Y. The diploid number of the male is 34.

Unequal autosomal bivalents are found at meiosis in two other species of Isagoras — Isagoras subaquiles Rehn and Isagoras sp. — and in Pseudophasma menius Westwood. The chromosome complements of these species are described.

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Literature Cited

  • Cappe de Baillon, P., M. Favrelle and G. de Vichet: Parthénogenèse et variation chez les Phasmes. IV Discussion des faits-conclusions. Bull. Biol. 72, 167–213 (1938).

    Google Scholar 

  • Cappe de Baillon, P. and G. de Vichet: La parthénogenèse des espèces Leptynia Pant. Bull. Biol. 74, 43–87 (1940).

    Google Scholar 

  • Erazi, A. R. R.: Contribution à l'étude chromosomique des Mantidae européennes. Rev. Fac. Sci. Univ. Istanbul 5, 1–24 (1940).

    Google Scholar 

  • Favrelle, M.: Recherches sur la spermatogenèse des Phasmes, — mâles d'origine bisexuée. Bull. Biol., Supp. 17, 1–155 (1934).

    Google Scholar 

  • —: Formule chromosomique et spermatogenèse du Phalces longiscaphus (Orthoptèra-Phasmidae). La Cellule 44, 173–186 (1935).

    Google Scholar 

  • Hughes-Schrader, S.: The “pre-metaphase stretch” and kinetochore orientation in phasmids. Chromosoma 3, 1–21 (1947).

    Google Scholar 

  • Jordan, H. E.: II The spermatogenesis of Aplopus Mayeri. Carn. Inst. Wash., Pub. 102, 13–36 (1908).

    Google Scholar 

  • de Sinéty, R.: Recherches sur la biologie et l'anatomie des Phasmes. La Cellule 19, 117–278 (1901).

    Google Scholar 

  • Suomalainen, E.: Die Chromosomenverhältnisse in der Spermatogenese einiger Blattarien. Ann. Acad. Sci. Fenn., Ser. A, IV, 1–60 (1946).

    Google Scholar 

  • White, M. J. D.: The evolution of the sex chromosomes. I The XO and X1X2Y mechanisms in praying mantids. J. Gen. 42, 143–172 (1941).

    Google Scholar 

  • —: Animal cytology and evolution. Cambridge Univ. Press, London 1945.

    Google Scholar 

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Authors and Affiliations

  1. Department of Zoology, Columbia University, USA

    Sally Hughes-Schrader

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  1. Sally Hughes-Schrader
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Hughes-Schrader, S. Reversion of XO to XY sex chromosome mechanism in a phasmid. Chromosoma 3, 52–65 (1950). https://doi.org/10.1007/BF00319469

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  • DOI: https://doi.org/10.1007/BF00319469

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