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Chiasma interference and centromere co-orientation in a spontaneous translocation heterozygote of Euchorthippus pulvinatus gallicus (Acrididae; Orthoptera)

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Abstract

The meiosis of an individual of the species Euchorthippus pulvinatus gallicus heterozygous for a reciprocal translocation involving chromosomes 3 and 6 has been analysed using the Giemsa C-banding technique. It is concluded that: (i) Chiasma interference in the quadrivalent seems to act only at the arm level. There is no interference across the translocation break point. No interchromosomal chiasma interference could be demonstrated, (ii) The results concerning the co-orientation of the quadrivalent suggest that the length of the chromosomal segments between two adjacent centromeres at metaphase I is related with their orientation behaviour.

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Authors and Affiliations

  1. Departamento de Genética, Facultad de Biología, Universidad Complutense, Madrid, Spain

    P. Arana, J. L. Santos & R. Giraldez

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  1. P. Arana
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  2. J. L. Santos
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  3. R. Giraldez
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Arana, P., Santos, J.L. & Giraldez, R. Chiasma interference and centromere co-orientation in a spontaneous translocation heterozygote of Euchorthippus pulvinatus gallicus (Acrididae; Orthoptera). Chromosoma 78, 327–340 (1980). https://doi.org/10.1007/BF00327391

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  • DOI: https://doi.org/10.1007/BF00327391

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