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…
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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.
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Tests with simulated and natural unisexual DNA samples show that this method can accurately identify genome complement and estimate ploidy, making this a valuable tool for assessing the genome composition of unisexual samples.
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The results provide direct evidence that genome exchange between sexual and unisexual Ambystoma occurs and demonstrate that the magnitude depends on which sexual species are present.
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