Genetic evaluation of performance traits in Brazilian Quarter Horse

• Autorzy: Monteiro Correa M J , Silveira de Mota M D
• Języki publikacji: EN

Abstrakty

EN

The aim of this study was to estimate genetic parameters for racing performance traits in Quarter Horses in Brazil. The data (provided by the Sorocaba Jockey Club) came from 3 Brazilian hippodromes in 1994-2003, with 11875 observations of race time and 7775 of the speed index (SI), distributed in 2403 and 2169 races, respectively. The variance components were estimated by the MTGSAM program, under animal models including the random additive genetic effect, random permanent environmental effect, and the fixed effects of sex, age and race. Heritabilities for race time and the SI, for the 3 distances studied (301, 365 and 402 m), varied from 0.26 to 0.41 and from 0.14 to 0.19, respectively, whereas repeatabilitys varied from 0.36 to 0.68 (time) and from 0.27 to 0.42 (SI) and the genetic correlations from 0.90 to 0.97 (time) and from 0.67 to 0.73 (SI).

• Wydawca: -
• Czasopismo: Journal of Applied Genetics
• Rocznik: 2007
• Tom: 48
• Numer: 2
• Opis fizyczny: p.145-151,fig.,ref.

Twórcy

autor

Monteiro Correa M J

• Department of Animal Breeding and Nutrition, School of Veterinary Medicine and Animal Science, Sao Paulo State University, C.P.560, CEP 18618-000, Boyucatu/SP, Brazil

autor

Silveira de Mota M D

• Department of Animal Breeding and Nutrition, School of Veterinary Medicine and Animal Science, Sao Paulo State University, C.P.560, CEP 18618-000, Boyucatu/SP, Brazil

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