R340 Bulldog Dwarfism (Chondrodysplasia) – Dexter

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Breed:  Dexter, Scottish Highland
Sample material:  Blood EDTA, Blood Heparin, Hair, Semen, Tissue


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Bulldog Dwarfism (also known as Bulldog Calf Syndrome or Congenital Bovine Chondrodysplasia) is a severe developmental disorder in cattle which results in stillborn, misshapen calves. The disorder is caused by a recessive mutation to the gene ACAN, which affects cartilage development. This variant of the disorder is found primarily in the Dexter breed.


Chromosome: 21

Gene: ACAN

Mode of Inheritance: Autosomal Recessive Lethal

Organ: Skeletal system

Sub-organ: Whole skeleton


Year published: 2007

Clinical Features

Affected fetuses show excessive dwarfism and abnormalities in cartilage development. Natural abortion takes place around 7th month of pregnancy. Carriers of Bulldog Dwarfism show mild dwarfism, particularly in the form of shortened legs.


Omia: 1271

Pubmed: 17952705