Breeding back

Breeding back

Breeding back can be described as either a natural or a human attempt to assemble or re-assemble the genes of an extinct subspecies or of a domesticated breed, which may still be present in the larger gene pool of the overall species or other interbreedable species.

In Domestic animals breeding back has occurred with the Utonagan and the Northern Inuit dogs in an attempt to recreate the 'wolf-look' without actually cross breeding with wolves. Other selectively bred examples of breeding back include that of the aurochs, the extinct forerunner of domestic cattle. The product of these attempts is called the Heck cattle. Another prominent breeding back effort is the Quagga Project to bring back the extinct subspecies of the Plains Zebra called Quagga. The Heck horse, a phenotypic copy of the tarpan has also been produced, although it lacks the upright manes.

Breeding back is controversial, especially claims that an extinct animal has been recreated. Phenotypical reconstruction (similar appearance) does not assure behavioral similarity. For some of the species that are being bred back, questions remain about the ecological niche, hardiness, and disease resistance of the original species. For instance, the aurochs died out almost 400 years ago and the records kept cannot definitively answer some of these questions.

Back Breeding in the Wild

Back breeding is also sometimes alleged to occur in feral animal populations. It is not certain if "primitive" feral breeds (such as of sheep or pigs) are so only because their ancestor were of primitive domestic breeds or if they have had a kind of natural back breeding. It is widely accepted that pigs will readily "go feral" and in the case of the introduced Razorbacks to the USA, pigs seem to revert to a 'wild boar' like state in not only appearance but also behavior and hardiness.

ee also

* Preservation breeding

References

* Koene, P., & Gremmen, B. (2001). Genetics of dedomestication in large herbivores. In 35th ISAE Conference, Davis, California, 2001 (pp. 68-68).

External links

* [http://extinctanimals.petermaas.nl The Extinction Website]
* [http://www.quaggaproject.org The Quagga Project]
* [http://www.the-tree.org.uk/EnchantedForest/verasum.htm Grazing Ecology and Forest History]


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