Multiple-trait genetic analyses of racing Performances of German trotters with disentanglement of genetic and driver effects

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dc.contributor.authorRöhe, R.
dc.contributor.authorSavas, T.
dc.contributor.authorBrka, M.
dc.contributor.authorWillms, F.
dc.contributor.authorKalm, E.
dc.date.accessioned2025-01-27T19:00:50Z
dc.date.available2025-01-27T19:00:50Z
dc.date.issued2001
dc.departmentÇanakkale Onsekiz Mart Üniversitesi
dc.description.abstractThe objectives of this study were the analysis of the effect of driver on racing Performances of trotters and development of a genetic model in order to estimate genetic parameters for German trotters. Data on 6,611 trotters with 163,322 records during 1997 and 1999 were analysed with a repeatability animal model using each individual start of trotters and pedigree information of up to 11 generations (13,202 horses). Besides the driver effect, the genetic model included year-season, age and sex of trotter, racing track, distance and condition of race track as fixed effects as well as additive genetic and permanent environmental effects as random effects. Traits analysed were Square root. of rank at finish, racing time per km and the logarithms of earnings per start. Ignoring the effect of driver resulted in an overestimation of heritability of 60, 24 and 44% for rank at finish, racing time and earnings, respectively, which shows the necessity to include the driver effect in the model. Drivers regarded as fixed or random effects resulted in a marginal change in parameters. Heritabilities based on the model with fixed driver effect were 0.05, 0.29 and 0.09 for ranks at finish, racing time and earnings, respectively. Genetic correlation between rank and racing time was 0,81. Both traits were highly correlated with earnings of -0.98 and -0.89 for ranking and racing time, respectively. Most important trait for selection of racing Performance was the racing time due to its substantial higher heritability and its high genetic correlation to earnings. Additionally, rank at finish has to be included in the breeding goal because it reflects more the potential of trotters to win at finish and accounts for records without earnings. © 2018 Copernicus GmbH.
dc.identifier.doi10.5194/aab-44-579-2001
dc.identifier.endpage587
dc.identifier.issn0003-9438
dc.identifier.issue6
dc.identifier.scopus2-s2.0-85063842514
dc.identifier.scopusqualityQ2
dc.identifier.startpage579
dc.identifier.urihttps://doi.org/10.5194/aab-44-579-2001
dc.identifier.urihttps://hdl.handle.net/20.500.12428/13478
dc.identifier.volume44
dc.indekslendigikaynakScopus
dc.language.isoen
dc.publisherCopernicus GmbH
dc.relation.ispartofArchives Animal Breeding
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanı
dc.rightsinfo:eu-repo/semantics/openAccess
dc.snmzKA_Scopus_20250125
dc.subjectanimal model; genetic conelation; heritability; horses; racing Performance; trotter
dc.titleMultiple-trait genetic analyses of racing Performances of German trotters with disentanglement of genetic and driver effects
dc.typeArticle

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