Genetic parameters of racing performance traits of Quarter horses in Brazil


Autoria(s): Villela, LCV; Mota, MDS; Oliveira, H. N.
Contribuinte(s)

Universidade Estadual Paulista (UNESP)

Data(s)

20/05/2014

20/05/2014

01/08/2002

Resumo

The data used in the present study were recorded at the Jockey Club of Sorocaba for 5094 racing performance of 1350 Quarter Horses at the Paulista Race Track of Sorocaba, state of São Paulo, Brazil, from 1991 to 1997. The considered traits were time and final rank. The model used in analysis included random animal and permanent environmental effects, and race, sex, age and origin as fixed effects. The variance and covariance components were estimated by the restricted maximum likelihood for an animal model, using the derivative-free process method and the MTDFREML software. For the time, heritability was 0.17 (0.05), while estimate of repeatability 0.55 (0.05). The lower heritability for the final rank, 0.13 (0.04), indicate that this trait is not the most appropriate one for inclusion in programs of Quarter horse selection in Sorocaba racetrack. The repeatability estimate for rank was 0.44 (0.04) and the genetic correlation between this trait and time was 0.99.

Formato

229-234

Identificador

http://dx.doi.org/10.1046/j.1439-0388.2002.00338.x

Journal of Animal Breeding and Genetics. Berlin: Blackwell Verlag Gmbh, v. 119, n. 4, p. 229-234, 2002.

0931-2668

http://hdl.handle.net/11449/13955

10.1046/j.1439-0388.2002.00338.x

WOS:000177464100004

Idioma(s)

eng

Publicador

Blackwell Verlag Gmbh

Relação

Journal of Animal Breeding and Genetics

Direitos

closedAccess

Tipo

info:eu-repo/semantics/article