Skip to Main content Skip to Navigation
Journal articles

Genetic consistency between gait analysis by accelerometry and evaluation scores at breeding shows for the selection of jumping competition horses

Abstract : he aim was to assess the efficiency of gaits characteristics in improving jumping performance of sport horses and confront accelerometers and judge scores for this purpose. A sample of 1,477 young jumping horses were measured using accelerometers for walk, trot, and canter. Of these, 702 were genotyped with 541,175 SNPs after quality control. Dataset of 26,914 horses scored by judges in breeding shows for gaits and dataset of 142,682 horses that performed in jumping competitions were used. Analysis of accelerometric data defined three principal components from 64% to 89% of variability explained for each gait. Animal mixed models were used to estimate genetic parameters with the inclusion to up 308,105 ancestors for the relationship matrix. Fixed effects for the accelerometric variables included velocity, gender, age, and event. A GWAS was performed on residuals with the fixed effect of each SNP. The GWAS did not reveal other QTLs for gait traits than the one related to the height at withers. The accelerometric principal components were highly heritable for the one linked to stride frequency and dorsoventral displacement at trot (0.53) and canter (0.41) and moderately for the one linked to longitudinal activities (0.33 for trot, 0.19 for canter). Low heritabilities were found for the walk traits. The genetic correlations of the accelerometric principal components with the jumping competition were essentially nil, except for a negative correlation with longitudinal activity at canter (-0.19). The genetic correlation between the judges' scores and the jumping competition reached 0.45 for canter (0.31 for trot and 0.17 for walk). But these correlations turned negative when the scores were corrected for the known parental breeding value for competition at the time of the judging. In conclusion, gait traits were not helpful to select for jumping performances. Different gaits may be suitable for a good jumping horse.
Document type :
Journal articles
Complete list of metadata

https://hal.inrae.fr/hal-03135513
Contributor : Anne Ricard <>
Submitted on : Tuesday, February 9, 2021 - 9:00:02 AM
Last modification on : Monday, May 10, 2021 - 2:18:54 PM

Licence


Distributed under a Creative Commons Attribution 4.0 International License

Links full text

Identifiers

Collections

Citation

Anne Ricard, Bernard Dumont Saint Priest, Marjorie Chassier, Margot Sabbagh, Sophie Danvy. Genetic consistency between gait analysis by accelerometry and evaluation scores at breeding shows for the selection of jumping competition horses. PLoS ONE, Public Library of Science, 2020, 15 (12), pp.e0244064. ⟨10.1371/journal.pone.0244064⟩. ⟨hal-03135513⟩

Share

Metrics

Record views

20