Genetic correlations between horse show jumping competition traits in five European countries

Ruhlmann, Claudio; Janssens, Steven; Philipsson, J.; Thoren-Hellsten, E; Crolly, H; Quinn, Karlee; Manfredi, Eduardo; Ricard, Anne

doi:10.1016/j.livsci.2008.09.006

Cited by 16 publications

(20 citation statements)

References 14 publications

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“…On the other hand, MTAM values were within the range of those reported by Ruhlmann et al . () for five show jumping European sport horse breeds (between 0.05 and 0.28) and lower than the range reported by Huizinga & Van der Meij () for the Dutch Warmblood Horse (between 0.18 and 0.20).…”

Section: Resultscontrasting

confidence: 53%

Genetic (co)variance components across age for Show Jumping performance as an estimation of phenotypic plasticity ability in Spanish horses

Bartolomé

Menéndez-Buxadera

Valera

et al. 2012

J Animal Breeding Genetics

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The purpose of this study was to study phenotypic plasticity ability for Show Jumping performance in horses according to age differences. For this study, 11 352 participations, belonging to 1085 horses grouped by age (4-, 5- or 6-year olds), were analysed. repeatability animal models (RAM) and multiple trait animal models (MTAM) were compared. RAM assumed the same covariance components for all age groups, whereas MTAM considered the results of every animal at every age group as different (but correlated) traits. The age, sex, starting order and training level were included as fixed effects. The random effects were the animal, the individual permanent environment, the competition and the rider. Six models were compared, and the rider-horse interaction was added as a random effect; furthermore, heterogeneous residual variance was taken into consideration only for MTAM. The study of the genetic correlations between age groups highlighted the presence of an age-genotype interaction and, therefore, an underlying environmental effect. This study may allow us to select horses with a plastic response, which show either a gradual response or a precocious response and thus gain or lose genetic potential with age, respectively.

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Section: Resultscontrasting

confidence: 53%

Genetic (co)variance components across age for Show Jumping performance as an estimation of phenotypic plasticity ability in Spanish horses

Bartolomé

Menéndez-Buxadera

Valera

et al. 2012

J Animal Breeding Genetics

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“…This can be confirmed for the pair Belgium/France for which the genetic correlation coefficient was previously estimated between 0.76 and 0.88 (Ruhlmann et al . ), while the Pearson correlation coefficient was equal to only 0.71 (Table ). Therefore, it would be interesting to have estimates of the genetic correlation coefficients for the missing pair Belgium/the Netherlands because imprecise estimates of genetic correlation coefficients could lead to inexact REL c (Calo et al .…”

Section: Resultsmentioning

confidence: 99%

“…Within the framework of this group, Ruhlmann et al . () concluded that an international evaluation of jumping horses is feasible. However, such an international genetic evaluation combining all information sources is not yet available, and one option is to integrate external information into the local genetic evaluation.…”

Section: Introductionmentioning

confidence: 99%

An integration of external information for foreign stallions into the Belgian genetic evaluation for jumping horses

Vandenplas

Janssens

Buys

et al. 2012

J Animal Breeding Genetics

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SummaryThe aim of this study was to test the integration of external information, i.e. foreign estimated breeding values (EBV) and the associated reliabilities (REL), for stallions into the Belgian genetic evaluation for jumping horses. The Belgian model is a bivariate repeatability Best Linear Unbiased Prediction animal model only based on Belgian performances, while Belgian breeders import horses from neighbouring countries. Hence, use of external information is needed as prior to achieve more accurate EBV. Pedigree and performance data contained 101 382 horses and 712 212 performances, respectively. After conversion to the Belgian trait, external information of 98 French and 67 Dutch stallions was integrated into the Belgian evaluation. Resulting Belgian rankings of the foreign stallions were more similar to foreign rankings according to the increase of the rank correlations of at least 12%. REL of their EBV were improved of at least 2% on average. External information was partially to totally equivalent to 4 years of contemporary horses' performances or to all the stallions' own performances. All these results showed the interest to integrate external information into the Belgian evaluation.

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“…Para el caso particular de equinos de origen Ibérico, como es el caso del caballo PSL, las estimaciones del presente estudio son inferiores a las publicadas por Molina et al (1999) y Gómez et al (2009) en variables zoométricas y de morfología en caballo de pura raza española; sin embargo, coinciden en magnitud a las publicadas por Gómez et al (2010) en caballos de carreras de origen Español. Las correlaciones genéticas se derivan de los efectos genéticos de pleitropismo y de ligamiento (Falconer y Mackay, 1996); sin embargo, las estimaciones a través de poblaciones y de variables pueden ser muy diferentes en magnitudes y signos, dado la composición genética de cada población y la naturaleza de las variables de interés (Ruhlmann et al, 2009;Thiruvenkadan et al, 2009). Correlaciones genéticas positivas de mediana a alta magnitud fueron reportadas por Bakhtiari y Heshmat (2009) y Molina et al (1999) en variables de conformación y morfológicas en equinos de origen Iraní y Español, respectivamente.…”

Section: Resultados Y Discusiónunclassified

Consanguinidad y estimación de parámetros genéticos para morfología del caballo Lusitano en México

2014

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Genetic correlations between horse show jumping competition traits in five European countries

Cited by 16 publications

References 14 publications

Genetic (co)variance components across age for Show Jumping performance as an estimation of phenotypic plasticity ability in Spanish horses

Genetic (co)variance components across age for Show Jumping performance as an estimation of phenotypic plasticity ability in Spanish horses

An integration of external information for foreign stallions into the Belgian genetic evaluation for jumping horses

Consanguinidad y estimación de parámetros genéticos para morfología del caballo Lusitano en México

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