Genetic parameters for earnings in Quarter Horse

Silva, A. P. A.; Curi, Rogério Abdallah; Langlois, Bertrand; Silva, J. A. H. V.

doi:10.4238/2014.august.1.2

Cited by 4 publications

(11 citation statements)

References 22 publications

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“…A higher percentage of females in the races has also been described for Thoroughbreds (Mota et al, 1998;Mota et al, 2005) and Arabian horses (Ekiz and Kocak, 2005), as well as for the QH breed (Buttram et al, 1988;Corrêa e Mota, 2007;Silva et al, 2014). A smaller number of males with race records is not the result of a smaller number of births but is rather due to the fact that not all males born are registered and perform racing activities.…”

Section: Animals (Sub)populations Pedigree Quality and Generation Intervalmentioning

confidence: 80%

Pedigree analysis of the racing line Quarter Horse: Genetic diversity and most influential ancestors

et al. 2021

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Section: Animals (Sub)populations Pedigree Quality and Generation Intervalmentioning

confidence: 80%

Pedigree analysis of the racing line Quarter Horse: Genetic diversity and most influential ancestors

et al. 2021

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“…Earnings represent the sum of monetary prizes earned by a horse over its lifetime career or at a specific age or period. In the present study, considering that 74.9% of the horses participated in their first race at 2 years of equestrian age and following the recommendations by Silva et al [5], earnings at 2 years of equestrian age (E2) was defined as the trait. The prize money won at 2 years of equestrian age was obtained at different times (from 1978 to 2015) and in different Brazilian currencies [12].…”

Section: Data Descriptionmentioning

confidence: 99%

“…The prize money won at 2 years of equestrian age was obtained at different times (from 1978 to 2015) and in different Brazilian currencies [12]. The values obtained [5] were then converted to international currency (USD), and the monetary update was obtained for June 2019 [13]. Since the phenotypic values of E2 showed no normal distribution, log10 transformation was applied [14].…”

Section: Data Descriptionmentioning

confidence: 99%

“…For race time and speed index [ 4 ], estimates were obtained by the MTGSAM program using animal models including the random additive genetic effect, random permanent environmental effect and the fixed effects of sex, age and race, with h 2 ranging from 0.14 to 0.41. Earnings [ 5 ] were estimated by Bayesian inference (GIBBS2F90), and included the effects of sex, year of racing and animal in all analyses, with h 2 ranging from 0.19 to 0.21. For the time class [ 6 ], the analyses used the same method as the previous study [ 5 ], and h 2 values ranged from 0.45 to 0.56.…”

Section: Introductionmentioning

confidence: 99%

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Racing Performance of the Quarter Horse: Genetic Parameters, Trends and Correlation for Earnings, Best Time and Time Class

Faria

Vicente

Silva

2023

Animals

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The aim of this study was to evaluate the sprint racing performance of Quarter Horses in Brazil. Estimating genetic parameters, trends and correlations were obtained by single- and two-trait analyses using Bayesian inference (earnings to 2 years of equestrian age, best time and time class at distances of 301 m and 402 m). The data comprised a period of 38 equestrian years (1978 to 2015) with 23,482 sprint race records from 5861 animals. The heritability estimates were of low to moderate magnitude, ranging from 0.10 to 0.37 (single-trait) and from 0.15 to 0.41 (two-traits), and the repeatability was 0.31 to 0.46. The additive, residual and phenotypic correlations between earnings to 2 years of equestrian age and the other traits (best time and time class in distances 301 m and 402 m) were high (−0.95, −0.96, 0.69 and 0.92), low (−0.29, −0.37, 0.26 and 0.27) and moderate (−0.41, −0.47, 0.37 and 0.47), respectively. There is a positive genetic trend for all traits considered. However, evaluation of the last 10 equestrian years (2006 to 2015) showed negative trends (genetic loss) and trends close to zero (genetic stagnation). The design of breeding programs using the earnings trait in conjunction with other racing performance traits can enhance changes in the genetic gains as a whole in speed-racing Quarter Horses. These findings suggest that the traits studied should be included in breeding selection programs for racing Quarter Horses.

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“…In the case of other livestock, many studies have been conducted on best linear unbiased prediction (BLUP) [12][13][14], but on racehorses, studies are limited due to perceived difficulty in generation, quantification, and analysis of data. However, a previous study determined a model by combining explanatory variables that affect the racing performance to assess the potential of development of Thoroughbred racehorse breeding based on KRA horse race data [2,15,16]. This study constructed a simple animal model of a combined performance index with these normalized variables for Korean racehorse breeding.…”

Section: Introductionmentioning

confidence: 99%

National genomic evaluation of Korean thoroughbreds through indirect racing phenotype

Lee¹,

Shin

Kim

2022

Anim Biosci

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Objective: Thoroughbred horses have been bred exclusively for racing in England for a long time.Additionally, because horse racing is a global sport, a healthy leisure activity for ordinary citizens, and a high-value business, systematic racehorse breeding at the population level is a requirement for continuous industrial development. Therefore, we established genomic evaluation system (using prize money as horse racing traits) to produce spirited, agile, and strong racing horse population Therefore, we estimated the genetic capacity of Thoroughbred racehorses and inferred the extent of improvement in the production of spirited, agile, and strong racing horses. Methods:We used phenotypic data from 25,061 Thoroughbred horses (all registered individuals in Korea) that competed in races between 1994 and 2019 at the Korea Racing Authority (KRA) and constructed pedigree structures. We quantified the improvement in racehorse breeding output by year in Korea, and this aided in the establishment of a high-level horse-fill industry. Results:We found that this pedigree-based BLUP method improved the racing performance of the Thoroughbred population with high accuracy, making it possible to construct an excellent Thoroughbred racehorse population in Korea. Conclusion:This study could be used to develop an efficient breeding program at the population level for Korean Thoroughbred racehorse populations as well as others.

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Genetic parameters for earnings in Quarter Horse

Cited by 4 publications

References 22 publications

Pedigree analysis of the racing line Quarter Horse: Genetic diversity and most influential ancestors

Pedigree analysis of the racing line Quarter Horse: Genetic diversity and most influential ancestors

Racing Performance of the Quarter Horse: Genetic Parameters, Trends and Correlation for Earnings, Best Time and Time Class

National genomic evaluation of Korean thoroughbreds through indirect racing phenotype

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