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Effects of long-time series of data on genetic evaluations for performance of Swedish Warmblood riding horses

Published online by Cambridge University Press:  08 June 2010

Å. Viklund ,
A. Näsholm ,
E. Strandberg  and
J. Philipsson
Å. Viklund*
Affiliation:
Department of Animal Breeding and Genetics, Swedish University of Agricultural Sciences, SE-750 07 Uppsala, Sweden
A. Näsholm
Affiliation:
Department of Animal Breeding and Genetics, Swedish University of Agricultural Sciences, SE-750 07 Uppsala, Sweden
E. Strandberg
Affiliation:
Department of Animal Breeding and Genetics, Swedish University of Agricultural Sciences, SE-750 07 Uppsala, Sweden
J. Philipsson
Affiliation:
Department of Animal Breeding and Genetics, Swedish University of Agricultural Sciences, SE-750 07 Uppsala, Sweden
*
†E-mail: Asa.Viklund@hgen.slu.se
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Abstract

For Swedish Warmblood sport horses, breeding values (BVs) are predicted using a multiple-trait animal model with results from competitions and young horse performance tests. Data go back to the beginning of the 1970s, and earlier studies have indicated that some of the recorded traits have changed through the years. The objective of this study was to investigate the effects of including all performance data or excluding the older ones compared to a bivariate model (BM) considering performance traits in early and late periods as separate traits. The bivariate approach was assumed to give the most correct BVs for the actual breeding population. Competition results in dressage and show jumping for almost 40 000 horses until 2006 were available. For riding horse quality test (RHQT), data of 14 000 horses judged between 1973 and 2007 were used. Genetic correlations of 0.69 to 1.00 were estimated between traits recorded at different time periods (RHQT data) or different birth year groups (competition data). A cross-validation study and comparison of BVs using different sets of data showed that most accurate and similar results were obtained when BVs were predicted from either the BM or the univariate model including all data from the beginning of the recording. We recommend using all data and applying the univariate model to minimise the computational efforts for genetic evaluations and for provision of reliable BVs for as many horses as possible.

Keywords

riding horsesbreeding valuecross-validation
Type
Full Paper
Information
animal , Volume 4 , Issue 11 , November 2010 , pp. 1823 - 1831
Copyright
Copyright © The Animal Consortium 2010

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References

Árnason, T, Sigurdsson, A 2004. International genetic evaluation of the Icelandic horse. Conference at the 55th Annual Meeting of the European Association for Animal Production, 5–8 September 2004, Bled, Slovenia, 17pp.Google Scholar
Árnason, T, Sigurdsson, Á, Lorange, LB 2006. Global genetic evaluations of the Icelandic horse and genetic connectedness between countries. In Proceedings of the 8th World Congress on Genetics Applied to Livestock Production, 13–18 August 2006, Belo Horizonte, Brazil, paper 24–16, 4pp.Google Scholar
Hill, WG 1984. On selection among groups with heterogeneous variance. Animal Production 39, 473–477.Google Scholar
Jensen, J, Madsen, P 1997. A user’s guide to DMU. A package for analyzing multivariate mixed models. National Institute of Animal Science, Foulum, Denmark, 19pp.Google Scholar
Tsuruta, S, Misztal, I, Lawlor, TJ 2004. Genetic correlations among production, body size, udder, and productive life traits over time in Holsteins. Journal of Dairy Science 87, 1457–1468.CrossRefGoogle ScholarPubMed
Van der Werf, JHJ, Meuwissen, THE, De Jong, G 1994. Effects of correction for heterogeneity of variance on bias and accuracy of breeding value estimation for Dutch dairy cattle. Journal of Dairy Science 77, 3174–3184.CrossRefGoogle ScholarPubMed
Van Vleck, LD 1966. Change in variance components associated with milk records with time and increase in mean production. Journal of Dairy Science 49, 36–40.CrossRefGoogle Scholar
Viklund, Å, Thorén Hellsten, E, Näsholm, A, Strandberg, E, Philipsson, J 2008. Genetic parameters for traits evaluated at field tests of 3- and 4-year-old Swedish Warmblood horses. Animal 2, 1832–1841.CrossRefGoogle ScholarPubMed
Viklund, Å, Braam, Å, Näsholm, A, Strandberg, E, Philipsson, J 2010. Genetic variation in competition traits at different ages and time periods and correlations with traits at field tests of 4-year-old Swedish Warmblood horses. Animal 4, 682–691.CrossRefGoogle ScholarPubMed
Weigel, KA, Banos, G 1997. Effect of time period of data used in international dairy sire evaluations. Journal of Dairy Science 80, 3425–3430.CrossRefGoogle ScholarPubMed
Wiggans, GR, VanRaden, PM 1991. Method and effect of adjustment for heterogeneous variance. Journal of Dairy Science 74, 4350–4357.CrossRefGoogle ScholarPubMed