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HERDA Traces to Poco Bueno

Inherited Quarter Horse Disease Traces To Poco Bueno

Poco Bueno has been identified as the sire line associated with the brutal affliction known as hyperelastosis cutis (HC) or hereditary equine regional dermal asthenia (HERDA). He was a giant among horses. Built like a rock, he possessed power and speed. He made his mark in the show ring as a champion, then retired to the breeding shed. His greatness was carried on through his get, grandget, and on down the line through succeeding generations of Quarter Horses.


It is primarily down through Poco Bueno’s bloodline, say researchers at Mississippi State University and Cornell University, that the recessive gene that causes hyperelastosis cutis (HC) has passed. HC is a brutal affliction that basically carries with it a death sentence. Although affected horses can be made more comfortable and their lives prolonged, there is no cure.
While Poco Bueno’s sire line is implicated as the origin of the disease, the majority of horses with HC trace directly to him.
The disease first surfaced in 1971. Today as more and more breeders double up on the Poco Bueno line through the mating of close-up and distant cousins, more and more cases of HC are showing up.



HERDA is a term favored by researchers at the University of California, Davis, while researchers like Ann Rashmir, DVM, MS, Dipl. ACVS, associate professor of surgery and head of the Hyperelastosis Cutis Research Program at Mississippi State University, and Nena Winand, DVM, PhD, a geneticist and assistant professor in the Department of Molecular Medicine at Cornell University, opt for hyperelastosis cutis. Rashmir and Winand are collaborators on research involving hyperelastosis cutis.

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