Czech J. Anim. Sci., 2005, 50(9):385-393 | DOI: 10.17221/4223-CJAS

Breeding value for type traits in beef cattle in theCzech Republic

Z. Veselá1, J. Přibyl1, P. Šafus1, L. Vostrý1, K. Šeba2, L. Štolc3
1 Research Institute of Animal Production, Prague-Uhříněves, Czech Republic
2 Czech Beef Cattle Association, Prague, Czech Republic
3 Czech Agricultural University, Prague, Czech Republic

The type was evaluated in 5 424 young animals of twelve beef breeds. Ten type traits were evaluated: height at sacrum (HS), body length (BL), live weight (LW), front chest width (CW), chest depth (CD), pelvis (P), shoulder muscling (SM), back muscling (BM), rump muscling (RM) and production type (PT). The traits represent two groups: (1) traits scoring body measurements and body capacity (HS, BL, LW, CW, CD, P) and (2) traits scoring muscling (SM, BM, RM, PT). These fixed effects were included in the model: breed, sex, HYS, mother's age, linear regression on age at evaluation and average gain from birth to evaluation. Fixed effects in the model explained 40% to 60% of variability. The highest values of heritability coefficient were estimated for HS (h2 = 0.51) and LW (h2 = 0.50). BL had the lowest values of heritability coefficient (h2 = 0.25). The values h2 = 0.25-0.32 were calculated for the traits scoring body capacity (CW, CD, P). The range of values for muscling traits was h2 = 0.26-0.35. The coefficient of heritability for PT was h2 = 0.34. All traits scoring muscling and PT showed high genetic correlations (rg > 0.95). The traits scoring body capacity (P, CW, CD) were highly genetically correlated with muscling rg > 0.83. Breeding values were determined by a multi-trait animal model. Standard deviations of breeding values were higher in HS (sBV = 0.71) and LW (sBV = 0.84), which was connected with a different method of evaluation of these traits. They were in the range of 0.19 (BL) to 0.30 (RM) in the other traits.

Keywords: animal model; beef cattle; breeding value; genetic correlation; heritability; type traits

Published: September 30, 2005  Show citation

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Veselá Z, Přibyl J, Šafus P, Vostrý L, Šeba K, Štolc L. Breeding value for type traits in beef cattle in theCzech Republic. Czech J. Anim. Sci.. 2005;50(9):385-393. doi: 10.17221/4223-CJAS.
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