The Genetics of Racing Performance in Arabian Horses

Ropka‐Molik, Katarzyna; Stefaniuk‐Szmukier, Monika; Musiał, Adrianna D; Velie, Brandon D.

doi:10.1155/2019/9013239

Cited by 18 publications

(9 citation statements)

References 35 publications

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“…Tunisian blood horses showed lower speed (13.06m/s); however, they still fell within the reference range.These findings were described inprevious studies (Paksoy and Ünal 2010;Paksoy et al, 2018). Such results indicate significant differences in effort and various racing predispositions observed in racing breeds, which are most likely conditioned by different genetic backgrounds (Ropka-Molik et al, 2019). This would confirm what is known by professionals in this sector that the occidental horse is more successful in races than the Tunisian and we will be tempted to assert the improving role of the occidental horse.…”

Section: Environmental Factors Affecting Race Performancesupporting

confidence: 72%

Determination of Race Performance’s Factors of Arabian Purebred Tunisian Horses and the Impact of Introduction of Occidental Purebred Horses Intunisia

Bensouf¹,

M’Hamdi²,

Ahmed³

et al. 2021

Malays. anim. husb. J.

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The aim of the study is to investigate the effects of age, sex, running distance and origin of horse on racing speed for Purebred Arabian horse in Tunisia. Although the occidental type is known to be more successful in racing than the Tunisian type, we undertook this study to try to confirm or deny this supremacy for a sample of racehorses born in Tunisia from occidental father. A total of 333 racing records were considered for race performance. The effects of environmental factors on (sex, age, father’s origin, race distance, number of race seasons) race performance were analyzed using the least-squares method(LSM).The racehorses studied were all Arabian Purebred horses in operation at the racecourse of Ksar Said from 2010 to 2020. They are 180 horses, 90 horses born of a Tunisian father, and 90 horses born in Tunisia ofthe occidentalfather. These horses are the best and most successful in their category. The study revealed that the gender and age effectswere statistically insignificant onracingperformance. Race performance was significantly influenced by the distance and the origin of the father which affirms the improving role of the occidentalhorse in the Tunisian population.

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Section: Environmental Factors Affecting Race Performancesupporting

confidence: 72%

Determination of Race Performance’s Factors of Arabian Purebred Tunisian Horses and the Impact of Introduction of Occidental Purebred Horses Intunisia

Bensouf¹,

M’Hamdi²,

Ahmed³

et al. 2021

Malays. anim. husb. J.

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“…PDK4 and COX4I2 single nucleotide polymorphisms are also implicated in racing performance in Quarter Horses 62 and others are linked to endurance performance in Arabian Horses (reviewed in Ref. 63). Until recently, the signalling mechanisms responsible for the adaptations that occur in equine skeletal muscle after single bouts and the accumulated benefits from regular training were poorly understood.…”

Section: Aerobic Exercise Modulates Gene and Microrna Expression In Amentioning

confidence: 99%

Epigenetic control of exercise adaptations in the equine athlete: Current evidence and future directions

Denham

McCluskey

Denham³

et al. 2020

Equine Veterinary Journal

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Horses (Equus ferus caballus) have evolved over the past 300 years in response to man‐made selection for particular athletic traits. Some of the selected traits were selected based on the size and horses’ muscular power (eg Clydesdales), whereas other breeds were bred for peak running performance (eg Thoroughbred and Arabian). Although the physiological changes and some of the cellular adaptations responsible for athletic potential of horses have been identified, the molecular mechanisms are only just beginning to be comprehensively investigated. The purpose of this review was to outline and discuss the current understanding of the molecular mechanisms underpinning the athletic performance and cardiorespiratory fitness in athletic breeds of horses. A brief review of the biology of epigenetics is provided, including discussion on DNA methylation, histone modifications and small RNAs, followed by a summary and critical review of the current work on the exercise‐induced epigenetic and transcriptional changes in horses. Important unanswered questions and currently unexplored areas that deserve attention are highlighted. Finally, a rationale for the analysis of epigenetic modifications in the context with exercise‐related traits and ailments associated with athletic breeds of horses is outlined in order to help guide future research.

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“…Speed is a fundamental trait to evaluate for horses competing in a race, and it has been widely used in racing horses (the classical “time per km”) [ 14 ]. Other common traits are the placing and the annual or career earnings [ 15 ]. Elite Arabian racing mares and stallions usually produce elite racing offspring, and this relationship is observed through many generations [ 16 ].…”

Section: Introductionmentioning

confidence: 99%

“…Elite Arabian racing mares and stallions usually produce elite racing offspring, and this relationship is observed through many generations [ 16 ]. Many studies were carried out to estimate the heritability value of the “performance” measured by different traits in many racing breeds, such as Thoroughbred, Arabian, and trotter horses [ 6 , 14 , 15 ]. However, race speed has never been rated before in Turkey, as well as finish time, position, and earnings.…”

Section: Introductionmentioning

confidence: 99%

Comparison of Random Regression Models with Different Order Legendre Polynomials for Genetic Parameter Estimation on Race Completion Speed of Arabian Horses

Önder

Şen

Piwczyński

et al. 2022

Animals

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This work aimed to compare the fitting performance of the random regression models applied to the different order orthogonal Legendre polynomials on the race completion speed (m/s) of Arabian racing horses. Legendre polynomial function for additive genetic, permanent environmental variances and heritability values with the L(2,2), L(2,3), L(3,2) and L(3,3) models (where L(i,j) means L(order of fit for additive genetic effects, order of fit for permanent environmental effects)) was estimated. A total of 233,491 race speed records (m/s) of Arabian horses were taken from the Jockey Club of Turkey between 2005 and 2016. The mean and standard deviation of heritability values were estimated as 0.294 ± 0.0746, 0.285 ± 0.0620, 0.302 ± 0.0767 and 0.290 ± 0.1018 for L(2,2), L(2,3), L(3,2), and L(3,3), respectively. The steady decreasing trend of permanent environmental variances for L(2,2) provided stationery for heritability values. According to Akaike information criterion (AIC) and Bayesian information criterion (BIC) values, the L(2,2) model could be reliably used to estimate heritability values for the racing speed of Arabian horses in the presence of repeated observations.

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The Genetics of Racing Performance in Arabian Horses

Cited by 18 publications

References 35 publications

Determination of Race Performance’s Factors of Arabian Purebred Tunisian Horses and the Impact of Introduction of Occidental Purebred Horses Intunisia

Determination of Race Performance’s Factors of Arabian Purebred Tunisian Horses and the Impact of Introduction of Occidental Purebred Horses Intunisia

Epigenetic control of exercise adaptations in the equine athlete: Current evidence and future directions

Comparison of Random Regression Models with Different Order Legendre Polynomials for Genetic Parameter Estimation on Race Completion Speed of Arabian Horses

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