AAEP Annual Convention Las Vegas 2009
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Economic Evaluation of Heritable Equine Regional Dermal Asthenia in the Quarter Horse Cutting Industry

Author(s):

S.G. Tipton, T. Smith, P.R. Ryan, J...

In: AAEP Annual Convention - Las Vegas, 2009 by American Association of Equine Practitioners
Updated:
DEC 09, 2009
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1. Introduction
Heritable equine regional dermal asthenia (HERDA) is an autosomal recessive disorder of the skin of Quarter Horses and horses of Quarter Horse lineage. The disease is most prevalent in cutting horses, with a 28% carrier frequency in elite cutting horse lines. We hypothesize that carrier horses may have a performance advantage in cutting and that economics may be driving the increased prevalence of HERDA within the cutting discipline.

2. Materials and Methods
The records of 1634 top-ranked performance cutting Quarter Horses of all ages and all divisions were evaluated from 1985 through 2006. Total winnings and average offspring earnings of leading sires were evaluated for carrier and normal status. Linear regression was used to identify relationships between averaged annual dollars of offspring earnings, HERDA classification, and year. An analysis of variance was used to compare the offspring information. All tests were considered significant at p ≤ 0.05. [...]

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Affiliation of the authors at the time of publication

Department of Clinical Science, College of Veterinary Medicine, Mississippi State University, Starkville, Mississippi 39762, USA (Tipton, Linford, Rashmir-Raven); Department of Animal and Dairy Sciences, Mississippi State University, Starkville, Mississippi 39762, USA (Smith, Ryan); Department of Agricultural Economics, Mississippi State University, Starkville, Mississippi 39762, USA (Anderson); and Department of Molecular Medicine, College of Veterinary Medicine, Cornell University, Ithaca, New York 14853, USA (Winand)

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