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Chromosomal polymorphism caused by supernumerary chromosomes inRattus rattus ssp.frugivurus (Rafinesque, 1814) (Rodentia, Muridae)

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Summary

A chromosomal numeric polymorphism 2n=38, 39, 40 and 41 in the speciesRattus rattus ssp.frugivurus (Rafinesque, 1814) is reported for the first time for this subspecies. The numbers 2n=39, 40 and 41 are new for the species. The polymorphism is due to the presence of 1, 2 or 3 B-chromosomes, which are all small metacentrics of the size and shaped very close to the other autosomes of the normal complement, and whose character of being supernumeraries is shown in Meiosis.

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Authors and Affiliations

  1. Departmento de Genetica, Facultad de Ciencias, Universidad de Granada, (Spain)

    M. A. Pretel & G. R. Diaz de la Guardia

Authors
  1. M. A. Pretel
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  2. G. R. Diaz de la Guardia
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Pretel, M.A., Diaz de la Guardia, G.R. Chromosomal polymorphism caused by supernumerary chromosomes inRattus rattus ssp.frugivurus (Rafinesque, 1814) (Rodentia, Muridae). Experientia 34, 325–328 (1978). https://doi.org/10.1007/BF01923014

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