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

Viklund, Åsa and Näsholm, Anna and Strandberg, Erling and Philipsson, Jan (2010). Effects of long-time series of data on genetic evaluations for performance of Swedish Warmblood riding horses. Animal. 4:11, 1823-1831
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Official URL: http://dx.doi.org/10.1017/S1751731110001175

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.

Authors/Creators:Viklund, Åsa and Näsholm, Anna and Strandberg, Erling and Philipsson, Jan
Title:Effects of long-time series of data on genetic evaluations for performance of Swedish Warmblood riding horses
Series/Journal:Animal (1751-732X)
Year of publishing :2010
Volume:4
Number:11
Page range:1823-1831
Publisher:Cambridge University Press
ISSN:1751-732X
Language:English
Additional Information:Originally published by Cambridge University Press in Animal. doi:10.1017/S1751731110001175
Publication Type:Journal article
Refereed:Yes
Full Text Status:Public
Subjects:Obsolete subject words > FORESTRY, AGRICULTURAL SCIENCES and LANDSCAPE PLANNING > Animal production > Animal breeding
Obsolete subject words > NATURAL SCIENCES > Biology > Cell and molecular biology > Genetics
Keywords:riding horses, breeding value, cross-validation
URN:NBN:urn:nbn:se:slu:epsilon-8-832
Permanent URL:
http://urn.kb.se/resolve?urn=urn:nbn:se:slu:epsilon-8-832
ID Code:5456
Department:(VH) > Dept. of Animal Breeding and Genetics
Deposited By: Åsa Viklund
Deposited On:18 Oct 2010 00:00
Metadata Last Modified:02 Dec 2014 10:40

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