the unique
Dexter Dun
Dexter Dun results from a mutated Tyrosinase Protein 1 (TYRP 1) also called the Brown Locus (b). Dexter dun is the result of a recessive ‘b’ gene on chromosome 8.
Dexter dun is a different dilute mutation than dun found in other breeds of cattle. It is unique to the Irish Dexter breed.
Historically, the Dexter Dun mutation appears to trace as far back as to when Irish Dexter and Kerry cattle were still regarded as one breed (and probably long before that). The b gene responsible for Dun coloration in Dexters was isolated in 2002. [Labs: Genserve of Saskatchewan Research Council, Texas A & M, and UC Davis.] “The
Facts of Dexter Color Genetics”, pdf fact sheet, 05/04/2018
by Kim Newswanger; American Dexter Cattle Association (ADCA). |
» Related Resource: UC Davis Veterinary
Genetics Laboratory Cattle
Tests |