Genetic correlations between competition traits and traits scored at breeding field-tests in Icelandic horses

Albertsdóttir, E.; Eriksson, Staffan; Näsholm, A.; Strandberg, E.; Árnason, Þorvaldur

doi:10.1016/j.livsci.2007.04.022

Cited by 20 publications

(25 citation statements)

References 4 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…For example, the heritability of height at withers has been reported to be 0.88 in Thoroughbreds above one year of age (Hintz et al, 1978), 0.20 in the Dutch Warmblood (Koenen et al, 1995), 0.79 in the Haflinger breed (Miglior et al, 1998), 0.73 in Norwegian Cold-blooded Trotters (Dolvik and Klemetsdal, 1999), 0.59 in the Andalusian horse (Molina et al, 1999), 0.47 in the Mangalarga breed (Mota et al, 2006), 0.67 in Austrian Noriker draught horse (Druml et al, 2008) and 0.34 in the Belgian warmblood horse (Rustin et al, 2009). For morphological partial scores, heritability estimates for leg stances are generally in the range of 0.08 (Druml et al, 2008;Saastamoinen et al, 1998;Thoren Hellsten et al, 2009) and 0.29 (Molina et al, 1999), while for overall type impression the heritability estimates are usually between about 0.20 (Christmann et al, 1995) and 0.30 (Albertsdottir et al, 2008). The heritability of gaits and movements may differ for walk, trot and canter (Albertsdottir et al, 2008), but the overall gaits score generally has an estimated heritability of about 0.15-0.20 (Molina et al, 1999;Preisinger et al, 1991;Saastamoinen et al, 1998).…”

Section: Discussionmentioning

confidence: 99%

“…For morphological partial scores, heritability estimates for leg stances are generally in the range of 0.08 (Druml et al, 2008;Saastamoinen et al, 1998;Thoren Hellsten et al, 2009) and 0.29 (Molina et al, 1999), while for overall type impression the heritability estimates are usually between about 0.20 (Christmann et al, 1995) and 0.30 (Albertsdottir et al, 2008). The heritability of gaits and movements may differ for walk, trot and canter (Albertsdottir et al, 2008), but the overall gaits score generally has an estimated heritability of about 0.15-0.20 (Molina et al, 1999;Preisinger et al, 1991;Saastamoinen et al, 1998). Our estimated heritabilities of 0.61 for HW, 0.07 for LE, 0.14 for OI and 0.17 for GA are generally in the range reported in the literature, even though higher estimates have been reported for conformation traits in Hanoverian Warmblood horses (Stock and Distl, 2006).…”

Section: Discussionmentioning

confidence: 99%

See 1 more Smart Citation

Selection for morphology, gaits and functional traits in Lusitano horses: I. Genetic parameter estimates

et al. 2014

View full text Add to dashboard Cite

a b s t r a c tGenetic parameters were estimated for morphology, gaits and functional traits in Lusitano horses by uni-and multivariate animal models. Morphological traits considered in the analyses were partial scores attributed to up to 18,076 horses at the time of registration in the studbook and included head and neck, shoulder and withers, chest and thorax, back and loin, croup, legs and overall impression, plus a final score computed by summing the partial morphological scores and the gaits score. The functional traits considered were the scores obtained in the dressage and maneability trials of working equitation (WE, about 1500 records by 200 horses), and classical dressage (12,131 records by 759 horses). The heritability (h 2 ) estimates for all partial morphological scores ranged between 0.12 and 0.18, except for legs (0.07). The h 2 for final score, height at withers and gaits was 0.18, 0.61 and 0.17, respectively, while for WE dressage trial and classical dressage it was 0.32 and for WE maneability trial it was 0.18. The genetic correlations (r G ) of final score with the different partial scores were generally high (0.56-0.95), while among partial components of morphology they were positive but widely different (0.08-0.77). With the exception of legs, r G between morphology/gaits and functional traits were positive, with a stronger relationship between morphological traits and performance in WE dressage trial (r G between 0.36 and 0.56) when compared with performance in maneability trial or classical dressage. Height at withers had a r G of 0.40 with performance in classical dressage, but lower r G (0.06 and À 0.10) with WE trials. Final score and overall impression had moderate to strong genetic relationships with functional traits, especially with WE dressage trial, while gaits had a strong r G with performance in all the disciplines (0.60-0.72). Indirect selection for morphology/gaits to improve functionality was assessed, by selecting for final score or a combined index of partial scores. Compared to direct selection for functionality, selection for final score or an index combining partial morphological scores would be less effective, resulting in accuracies of, respectively, 0.28 and 0.37 for WE dressage trial, 0.14 and 0.38 for WE maneability trial and 0.22 and 0.39 for classical dressage. Thus, an index combining all partial morphological scores would be better than selection for overall final score, but its relative efficiency compared to direct selection would be about 0.7 in WE dressage trial and classical dressage, and 0.9 in WE maneability trial. Lusitano horses maintain considerable levels of genetic variability, and selection for both morphology and functionality should be effective. The favorable genetic relationships existing between morphology and performance indicate that morphology/gaits traits can play an important role in a two-stage selection program, contributing to enhance selection

show abstract

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Selection for morphology, gaits and functional traits in Lusitano horses: I. Genetic parameter estimates

et al. 2014

View full text Add to dashboard Cite

show abstract

“…The estimated heritability of the subjectively assessed traits of conformation and riding ability in Icelandic horses has been reported to range between 0.22-0.46 and 0.20-0.63, respectively with most of them having a positive genetic correlation (Albertsdóttir et al, 2008).…”

Section: Introductionmentioning

confidence: 99%

Association of conformation and riding ability in Icelandic horses

Kristjánsson

Björnsdóttir²,

Albertsdóttir

et al. 2016

Livestock Science

View full text Add to dashboard Cite

“…Genetic parameters reported for conformation and gait traits indifferent horse breeds have revealed heritability estimates in the range of 0.20 (Christmann et al, 1995) to 0.30 (Albertsdóttir et al, 2008) for harmony, 0.08-0.43 for walk, 0.16-0.49 for trot and 0.17-0.37 for canter (Viklund et al, 2008;Schroderus and Ojala, 2010). Moreover, the genetic correlations between conformation and gaits are usually reported to be positive and moderate to high, in the range of 0.34-0.93 (Ducro et al, 2007a;Vicente et al, 2014a), indicating that both groups of traits can be selected simultaneously.…”

Section: Introductionmentioning

confidence: 99%

Genetic parameters for harmony and gaits in Hispano-Arabe horses estimated by Bayesian methods and Restricted Maximum Likelihood

et al. 2016

View full text Add to dashboard Cite

Genetic correlations between competition traits and traits scored at breeding field-tests in Icelandic horses

Cited by 20 publications

References 4 publications

Selection for morphology, gaits and functional traits in Lusitano horses: I. Genetic parameter estimates

Selection for morphology, gaits and functional traits in Lusitano horses: I. Genetic parameter estimates

Association of conformation and riding ability in Icelandic horses

Genetic parameters for harmony and gaits in Hispano-Arabe horses estimated by Bayesian methods and Restricted Maximum Likelihood

Contact Info

Product

Resources

About