Unisexual salamanders (genus Ambystoma) present a new reproductive mode for eukaryotes.

@article{Bogart2007UnisexualS,
  title={Unisexual salamanders (genus Ambystoma) present a new reproductive mode for eukaryotes.},
  author={James P. Bogart and Ke Bi and Jinzong Fu and Daniel W. A. Noble and John H. Niedzwiecki},
  journal={Genome},
  year={2007},
  volume={50 2},
  pages={
          119-36
        }
}
To persist, unisexual and asexual eukaryotes must have reproductive modes that circumvent normal bisexual reproduction. Parthenogenesis, gynogenesis, and hybridogenesis are the modes that have generally been ascribed to various unisexuals. Unisexual Ambystoma are abundant around the Great Lakes region of North America, and have variously been described as having all 3 reproductive modes. Diploid and polyploid unisexuals have nuclear genomes that combine the haploid genomes of 2 to 4 distinct… Expand
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Evidence is provided that different biotypes within the unisexual lineage have distinct ecological interactions with sexual taxa, supporting a role for these differences as a mechanism promoting coexistence between some sexual and unisexual forms. Expand
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TLDR
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TLDR
GISH is an effective tool that can be used to identify and to quantify genomic constituents and to investigate intergenomic interactions in unisexual salamanders and has potential application to examine possible genomic evolution in other unisexuals. Expand
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TLDR
It is estimated that the unisexual Ambystoma complex was formed from a hybridization event in which the nuclear DNA of the original maternal species was subsequently lost, and probably originated less than 25 000 years ago. Expand
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TLDR
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TLDR
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TLDR
The results clearly link the hemiclonal genome to contemporary P. monacha and therefore support the hypothesis of a recent origin and suggest that this unisexual fish may serve as a vehicle for introgression between two allopatric sexual species. Expand
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  • Biology, Medicine
  • Proceedings of the National Academy of Sciences of the United States of America
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TLDR
Electrophoretic comparison of diagnostic enzymes indicates that these unisexuals are triploid with two nuclear genomes from the bisexual species Ambystoma laterale and one from AmbyStoma jeffersonianum; however, according to restriction analysis, the mtDNAs of these specimens derive from a third species, Am bystoma texanum. Expand
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