Genetic parameter estimation for long endurance trials in the Uruguayan Criollo horse

R. D. López-Correa; F. Peñagaricano; G. Rovere; J. I. Urioste

doi:10.1111/jbg.12324

Genetic parameter estimation for long endurance trials in the Uruguayan Criollo horse

R. D. López-Correa^*, F. Peñagaricano, G. Rovere, J. I. Urioste

^*Corresponding author for this work

Center for Quantitative Genetics and Genomics

Research output: Contribution to journal/Conference contribution in journal/Contribution to newspaper › Journal article › Research › peer-review

3 Citations (Scopus)

Abstract

The aim of this study was to estimate the genetic parameters of performance in a 750-km, 15-day ride in Criollo horses. Heritability (h²) and maternal lineage effects (mt²) were obtained for rank, a relative placing measure of performance. Additive genetic and maternal lineage (rmt) correlations among five medium-to-high intensity phase ranks (pRK) and final rank (RK) were also estimated. Individual records from 1,236 Criollo horses from 1979 to 2012 were used. A multivariate threshold animal model was applied to the pRK and RK. Heritability was moderate to low (0.156-0.275). Estimates of mt² were consistently low (0.04-0.06). Additive genetic correlations between individual pRK and RK were high (0.801-0.924), and the genetic correlations between individual pRKs ranged from 0.763 to 0.847. The pRK heritabilities revealed that some phases were explained by a greater additive component, whereas others showed stronger genetic relationships with RK. Thus, not all pRK may be considered as similar measures of performance in competition.

Original language	English
Journal	Journal of Animal Breeding and Genetics
Volume	135
Issue	3
Pages (from-to)	186-193
Number of pages	8
ISSN	0931-2668
DOIs	https://doi.org/10.1111/jbg.12324
Publication status	Published - 7 May 2018

Keywords

Endurance
Genetic correlation
Heritability
Horse
Rank

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10.1111/jbg.12324

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abstract = "The aim of this study was to estimate the genetic parameters of performance in a 750-km, 15-day ride in Criollo horses. Heritability (h2) and maternal lineage effects (mt2) were obtained for rank, a relative placing measure of performance. Additive genetic and maternal lineage (rmt) correlations among five medium-to-high intensity phase ranks (pRK) and final rank (RK) were also estimated. Individual records from 1,236 Criollo horses from 1979 to 2012 were used. A multivariate threshold animal model was applied to the pRK and RK. Heritability was moderate to low (0.156-0.275). Estimates of mt2 were consistently low (0.04-0.06). Additive genetic correlations between individual pRK and RK were high (0.801-0.924), and the genetic correlations between individual pRKs ranged from 0.763 to 0.847. The pRK heritabilities revealed that some phases were explained by a greater additive component, whereas others showed stronger genetic relationships with RK. Thus, not all pRK may be considered as similar measures of performance in competition.",

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Genetic parameter estimation for long endurance trials in the Uruguayan Criollo horse. / López-Correa, R. D.; Peñagaricano, F.; Rovere, G. et al.
In: Journal of Animal Breeding and Genetics, Vol. 135, No. 3, 07.05.2018, p. 186-193.

Research output: Contribution to journal/Conference contribution in journal/Contribution to newspaper › Journal article › Research › peer-review

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Genetic parameter estimation for long endurance trials in the Uruguayan Criollo horse

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