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Synthesis of an attached autosome, C(3)RM, inDrosophila pseudoobscura

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Abstract

Drosophila pseudoobscura has three acrocentric autosomes. In the experiments reported, homologous arms of the third chromosome were attached to the same centromere. This is a ‘reversed metacentric compound’ third chromosome, denoted by C(3)RM. This compound chromosome is relatively fertile in within-strain crosses (ca. 50% egg hatch) but sterile when outcrossed to a normal karyotype. When constructing translocations for this experiment, the behavior of the Y-autosome translocations suggested that this species can tolerate more Y chromosome deficiency while retaining fertility than canDrosophila melanogaster. Finally, there were no Robertsonian exchanges observed among the 96 autosome-autosome translocations analyzed cytologically.

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Authors and Affiliations

  1. Department of Entomology, University of California, 95616, Davis, CA, USA

    L. G. Harshman & T. Prout

  2. Department of Genetics, University of California, 95616, Davis, CA, USA

    L. G. Harshman & T. Prout

Authors
  1. L. G. Harshman
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  2. T. Prout
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Harshman, L.G., Prout, T. Synthesis of an attached autosome, C(3)RM, inDrosophila pseudoobscura . Genetica 80, 87–91 (1990). https://doi.org/10.1007/BF00127128

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  • DOI: https://doi.org/10.1007/BF00127128

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