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Parameter estimates for genetic effects on carcass traits of Korean Native Cattle1

Parameter estimates for genetic effects on carcass traits of Korean Native Cattle1,J. W. Lee,S. B. Choi,J. S. Kim,J. F. Keown,L. D. Van Vleck

Parameter estimates for genetic effects on carcass traits of Korean Native Cattle1   (Citations: 10)
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Data (n = 1,746) collected from 1985 through 1995 on Korean Native Cattle by the National Livestock Research Institute of Korea were used to esti- mate genetic parameters for marbling score, dressing percentage, and longissimus muscle area, with backfat thickness, slaughter age, or slaughter weight as covari- ates. Estimates were obtained with REML. Model 1 included animal genetic and residual random effects. Model 2 was extended to include an uncorrelated ran- dom effect of the dam. Model 3 was based on Model 1 but also included sire × region × year-season interaction effects. Model 4 combined Models 2 and 3. All models included fixed effects for region × year-season and age of dam × sex combinations. From single-trait analyses, estimates of heritability with covariates to adjust for backfat thickness, slaughter age, and slaughter weight from Model 4 were, respectively, .10, .08, and .01 for marbling score; .09, .12, and .16 for dressing percentage; and .18, .17, and .24 for longissimus muscle area. From three-trait analyses, estimates of genetic correlations between marbling score and dressing percentage, mar- bling score and longissimus muscle area, and dressing percentage and longissimus muscle area were, respec-
Published in 2010.
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    • ...Only one study(34) assessed the effects of slaughter end point on estimates of genetic correlations for dressing percentage and longissimus muscle area...
    • ...Un sólo estudio(34) evaluó los efectos de diferentes criterios de sacrificio sobre los estimadores de correlaciones genéticas entre rendimiento en canal y área del músculo longissimus...
    • ...ranged from -0.38 for steers and heifers of Hereford sires and Angus-Holstein cows(42) to 0.39 for Korean Native cattle(34)...
    • ...estimadores estuvieron en un rango que fue de -0.38, para novillos y vaquillas hijas de sementales Hereford y vacas Angus-Holstein(42), a 0.39, para ganado Coreano Nativo(34)...
    • ...En un trabajo(34) se encontró que los estimadores fueron diferentes dependiendo de la covariable usada como criterio de sacrificio: 0.20 con espesor de la grasa dorsal, 0.39 con peso al sacrificio y 0.47 con edad al sacrificio como covariable, mientras que en otro(14) se concluyó que los estimadores de las correlaciones genéticas fueron moderados cuando se usaron la edad (0.46) y el espesor de la grasa dorsal (0.48) como ...

    Ángel Ríos Utreraa. Estimadores de correlaciones genéticas para características de la cana...

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