Experientia

, Volume 47, Issue 5, pp 490–493 | Cite as

Pentaploidy in hybrid salamanders demonstrates enhanced tolerance of multiple chromosome sets

  • L. A. Lowcock
  • R. W. Murphy
Research Articles

Summary

Breeding populations of unisexual hybrid salamanders (genusAmbystoma) are dominated by allotriploid (3n) and allotetraploid (4n) forms, however, sexually mature allopentaploids (5n) may also occur. These are the first known naturally-occurring pentaploid vertebrates, and their genesis differs from that of previously studied autopentaploid urodeles induced or observed in the laboratory. The latter always suffered severely deleterious effects in development, and could not attain sexual maturity.

Key words

Vertebrates unisexuality allopentaploidy Ambystoma 

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Copyright information

© Birkhäuser Verlag 1991

Authors and Affiliations

  • L. A. Lowcock
    • 1
  • R. W. Murphy
    • 2
  1. 1.Department of Ichthyology and HerpetologyRoyal Ontario MuseumToronto(Canada)
  2. 2.Ramsay Wright Zoological LaboratoriesUniversity of TorontoToronto(Canada)

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