• Source: Natural bobtail

A natural bobtail is an animal's tail which due to a mutated gene grows unusually short or is missing completely. The genes for the shortened tail may be dominant or recessive.
Because of legislation restricting or preventing docking, natural bobtails are growing in popularity among the dog fancy for some traditionally docked breeds. For example, one Boxer breeder and geneticist in England has successfully petitioned the Kennel Club for permission to cross Corgis into his lines and then backcross to Boxers, introducing the gene into his lines. This would have been unheard of in decades past. A number of these bobtail Boxers have been exported to various countries around the world.
However in some breeds, such as the Rottweiler, natural bobtails are not universally accepted in the Country of Origin Breed Standard.




Animals with a natural bobtail






= Cats

=

More than one gene is responsible for tail suppression in cats; research is incomplete, but it is known that the Japanese Bobtail and related breeds have a different mutation from that found in the Manx and its derivatives.

American Bobtail
Japanese Bobtail–tails are short and kinked, but not entirely absent
Karelian Bobtail–tails are short and kinked, but not entirely absent
Korean Bobtail–tails are short and kinked, but not entirely absent
Kurilian Bobtail
Manx, and Cymric or Manx Longhair; tails range from full to entirely absent
Mekong Bobtail, a variant of the Siamese
Pixie-bob
Experimental breeds (mostly cross-breeds of the above):

Alpine Lynx cat
American Lynx cat
Desert Lynx cat
Highlander cat
Owyhee Bob




= Dogs

=
A mutation in a gene called the T-box transcription factor T gene (C189G) accounts for natural bobtails in 21 dog breeds, but not in another 5 breeds, for which the genetic mechanism is yet to be determined. This study counted Rottweilers as not as not having the C189G gene, but tested only five Rottweilers, only two of which were short-tailed dogs. The mutation is autosomal dominant and appears to be lethal in the embryonic stage when homozygous. Another study showed that Rottweilers do carry the gene, and Dobermanns (not tested by the earlier study) do as well, the linked page provides a list of breeds associated as having the C189G Gene and been known for having Natural Bobtails in the breed.In addition the Pembroke Welsh Corgi identified in previous research.
Although the following dogs may present a natural bobtail, the C189G mutation often appeared after decades or centuries of docking, which is considered in many countries, unnecessary, painful, cruel or mutilation. Today, many countries ban cropping and docking. In countries where docking is banned, natural bobtail dogs must present a certificate to show that their tail is a result of the C189G mutation in order to be shown.
Breeds that can present C189G mutation:

Australian Shepherd
Austrian Pinscher
Australian Stumpy Tail Cattle Dog
Braque du Bourbonnais (Bourbonnais Pointer)
Braque Francais (Savoy Sheepdog)
Brazilian Terrier
Brittany
Croatian Sheepdog
Danish–Swedish Farmdog
Dobermann
Donggyeongi
English Shepherd
Jack Russell Terrier
Karelian Bear Dog
Labrador Retriever
Mountain Cur
Mudi
Pembroke Welsh Corgi
Polish Lowland Sheepdog
Pyrenean Shepherd
Rottweiler
Schipperke
Spanish Water Dog
Swedish Vallhund
Breeds without C189G mutation and presenting natural bobtail:189

Boston Terrier
English Bulldog
King Charles Spaniel
Miniature Schnauzer
Parson Russel Terrier
Dog breeds into which the C189G mutation has been introduced by cross-breeding:

Boxer
Dog breeds where natural bobtails have not yet been tested for C189G mutation. Breeds in this sub-list often have full tails.

Armant
Entlebucher Mountain Dog
French Bulldog
Hmong bobtail dog
McNab
Miniature Fox Terrier
Old English Sheepdog
Rat Terrier
Tenterfield Terrier




References

Kata Kunci Pencarian:

• Aliivibrio fischeri
• Natural bobtail
• Bobtail
• Hmong bobtail dog
• Kurilian Bobtail
• Japanese Bobtail
• NBT
• Mudi
• Miniature American Shepherd
• Welsh Corgi
• Entlebucher Mountain Dog