Home About Browse Search
Svenska


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

Viklund, Åsa and Braam, Å. and Näsholm, Anna and Strandberg, Erling and Philipsson, Jan (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. 4:5, 682-691
[Journal article]

[img]
Preview
PDF
248kB

Official URL: http://dx.doi.org/10.1017/S1751731110000017

Abstract

For many years, the breeding value estimation for Swedish riding horses has been based on results from Riding Horse Quality Tests (RHQTs) of 4-year-olds only. Traits tested are conformation, gaits and jumping ability. An integrated index including competition results is under development to both get as reliable proofs as possible and increases the credibility of the indexes among breeders, trainers and riders. The objectives of this study were to investigate the suitability of competition data for use in genetic evaluations of horses and to examine how well young horse performance agrees with performance later in life. Competition results in dressage and show jumping for almost 40 000 horses from the beginning of the 1960s until 2006 were available. For RHQT data of 14 000 horses judged between 1988 and 2007 were used. Genetic parameters were estimated for accumulated competition results defined for different age groups (4 to 6 years of age, 4 to 9 years of age and lifetime), and for different birth year groups. Genetic correlations were estimated between results at RHQT and competitions with a multi-trait animal model. Heritabilities were higher for show jumping than dressage and increased with increasing age of the horse and amount of information. For dressage, heritabilities increased from 0.11 for the youngest group to 0.16 for lifetime results. For show jumping corresponding values increased from 0.24 to 0.28. Genetic correlations between competition results for the different age groups were highly positive (0.84 to 1.00), as were those between jumping traits at RHQT and competition results in show jumping (0.87 to 0.89). For dressage-related traits as 4-year-old and dressage competition results the estimated genetic correlations were between 0.47 and 0.77. We suggest that lifetime results from competitions should be integrated into the genetic evaluation system. However, genetic parameters showed that traits had changed during the over 35-year period covered due to the development of the sport, which needs to be considered in future genetic evaluations.

Authors/Creators:Viklund, Åsa and Braam, Å. and Näsholm, Anna and Strandberg, Erling and Philipsson, Jan
Title: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
Series/Journal:Animal (1751-732X)
Year of publishing :2010
Volume:4
Number:5
Page range:682-691
Publisher:Cambridge University Press
ISSN:1751-732X
Language:English
Additional Information:Originally published by Cambridge University Press in Animal. doi:10.1017/S1751731110000017
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, dressage, show jumping, performance test, genetic parameters
URN:NBN:urn:nbn:se:slu:epsilon-e-3509
Permanent URL:
http://urn.kb.se/resolve?urn=urn:nbn:se:slu:epsilon-e-3509
ID Code:5455
Department:(VH) > Dept. of Animal Breeding and Genetics
Deposited By: Åsa Viklund
Deposited On:18 Oct 2010 00:00
Metadata Last Modified:20 Jun 2016 14:41

Repository Staff Only: item control page

Downloads

Downloads per year (since September 2012)

View more statistics

Downloads
Hits