Pentaploidy in hybrid salamanders demonstrates enhanced tolerance of multiple chromosome sets |
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| Authors: | L A Lowcock R W Murphy |
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| Institution: | (1) Department of Ichthyology and Herpetology, Royal Ontario Museum, 100 Queen's Park, M5S 2C6 Toronto, Ontario, (Canada);(2) Ramsay Wright Zoological Laboratories, University of Toronto, Toronto, Ontario, (Canada) |
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| Abstract: | 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. |
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| Keywords: | Vertebrates unisexuality allopentaploidy Ambystoma |
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