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Cytological demonstration of female heterogamety in isopods

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Résumé

Des chromosomes sexuels, inconnus jusqu'à présent chez les Isopodes, ont été trouvés dans 4 espèces de la superespèceJaera marina (Janiridae, Asellota). Il s'agit d'un système multiple de chromosomes sexuels, ce qui aboutit à la formation d'un trivalent sexuel dans la méiose femelle. Les femelles — hétérogamétiques — ont la constitution XY1Y2, les mâles étant XX. D'après les données chromosomiques présentées par les 4 espèces étudiées, la formation du système multiple sexuel est due à des processus cytologiques évolutifs d'ordre Robertsonien.

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Authors and Affiliations

  1. Abt. Bauer, Max-Planck-Institut für Meeresbiologie, Wilhelmshaven, Germany

    H. Staiger & Ch. Bocquet

  2. Biological Station of Roscoff, France

    H. Staiger & Ch. Bocquet

Authors
  1. H. Staiger
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  2. Ch. Bocquet
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Additional information

Aided by a grant from the Janggen Pöhn Foundation (St. Gallen, Switzerland) and supported by the Swiss Commission for the Biological Station of Roscoff.

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Staiger, H., Bocquet, C. Cytological demonstration of female heterogamety in isopods. Experientia 10, 64–66 (1954). https://doi.org/10.1007/BF02161456

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