Prevalence, risk factors and genetic parameters of cresty neck in Pura Raza Español horses

Sánchez, M.J., Azor, P.J., Molina, A., Parkin, T. , Rivero, J.L.L. and Valera, M. (2017) Prevalence, risk factors and genetic parameters of cresty neck in Pura Raza Español horses. Equine Veterinary Journal, 49(2), pp. 196-200. (doi:10.1111/evj.12569) (PMID:26877245)

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Abstract

Reasons for performing study: Cresty neck is a relatively common morphological defect in Pura Raza Español horses and other Baroque type horse breeds, which adversely affects the breeding industry. Objectives: To establish the within-breed prevalence, possible associated factors and heritability of cresty neck in Pura Raza Español horses. Study design: Cross-sectional analysis of a large worldwide database of Pura Raza Español horses. Methods: The database included evaluations of 10,929 Pura Raza Español horses from 24 countries. Cresty neck score, on a 9 point scale, girth-to-height ratio, height at the withers, length of neck, head–neck junction and neck–body junction were recorded. A Bayesian genetic animal model included the following systematic effects: girth-to-height ratio, age, sex, coat colour and geographical area of the stud. Animal and residual effects were included as random effects. Results: Within this Pura Raza Español population, 8.91% had a cresty neck score ≥5, which is the threshold for penalty or disqualification in the studbook of the breed. The age, sex, coat colour and stud geographical area were significantly associated with cresty neck score. The estimated heritability coefficient for cresty neck score was 0.37 (s.d. = 0.034) and genetic correlation between cresty neck score and other conformational traits ranged from −0.06 (height-at-withers) to −0.21 (neck–body junction). Conclusions: Cresty neck is a prevalent defect in Pura Raza Español horses, associated with age, sex, coat colour and other conformational traits, with a moderate level of heritability. Breeding to select against this condition may therefore be beneficial in this breed.

Item Type:Articles
Additional Information:The study was supported by grants of the ANCCE and project P10–AGR–5963 , Junta de Andalucía, Spain.
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Parkin, Professor Timothy
Authors: Sánchez, M.J., Azor, P.J., Molina, A., Parkin, T., Rivero, J.L.L., and Valera, M.
College/School:College of Medical Veterinary and Life Sciences > School of Veterinary Medicine
Journal Name:Equine Veterinary Journal
Publisher:Wiley
ISSN:0425-1644
ISSN (Online):2042-3306
Published Online:19 March 2016

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