Introgression in the genus Salmo via allotriploids.

@article{Castillo2007IntrogressionIT,
  title={Introgression in the genus Salmo via allotriploids.},
  author={Ana G. F. Castillo and Edward P. Beall and P Mor{\'a}n and Jos{\'e} L Mart{\'i}nez and Fernando Naclerio Ayll{\'o}n and Eva Garc{\'i}a-V{\'a}zquez},
  journal={Molecular ecology},
  year={2007},
  volume={16 8},
  pages={1741-8}
}
Hybridization between sympatric species is not uncommon in the wild. Wild allotriploids (individuals with two chromosome sets from a species + one chromosome set from another species) are generally the result of a backcross between interspecific hybrids that produce unreduced gametes and one of the parental species. In animals, allotriploids are commonly sterile, except for some vertebrate species complexes in which allotriploids reproduce by parthenogenesis, gynogenesis and/or hybridogenesis… CONTINUE READING

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