Five recessive variants in the fibroblast growth factor-5 (FGF5) gene are associated with long hair phenotypes in dogs.
Phenotype: Long hair. Some breeds are strictly short-haired (e.g. Beagles); some have both short- and long-haired individuals (e.g. Dachshunds); other breeds are characterized by long hair (e.g. Afghan Hounds).
Mode of Inheritance: Autosomal recessive
Alleles: S = Short hair, L* = Long hair (five variants)
- Dogs with S/S genotype are expected to have short hair. They cannot transmit any of these long hair variants to their offspring.
- Dogs with S/L* genotype are expected to have short hair and are carriers of a long hair variant. They will transmit their long hair variant to 50% of their offspring. Matings between two carriers of a long hair variant are expected to produce 25% puppies with long hair.
- Dogs with L*/L* genotype are expected to have long hair. They will transmit their long hair variant to all of their offspring
Possible Test Results :
- S/S (Short Hair)
- S/L (Long Hair Carrier)
- L/L (Long Hair)