Estimates of genetic parameters for carcass, growth and reproductive traits in Nellore cattle

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Caetano, S. L. [UNESP]
Savegnago, R. P. [UNESP]
Boligon, A. A. [UNESP]
Ramos, S. B. [UNESP]
Chud, T. C S [UNESP]
LÔbo, R. B.
Munari, D. P. [UNESP]

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The objective of this study was to estimate genetic parameters for female mature weight (FMW), age at first calving (AFC), weight gain from birth to 120 days (WG_B_120), from 210 to 365 days (WG_210_365), rib eye area (REA), back fat thickness (BF), rump fat (RF) and body weight at scanning date (BWS) using single and multiple-trait animal models by the REML method from Nellore cattle data. The estimates of heritability ranged from 0.163±0.011 for WG_210_365 to 0.309±0.028 for RF using the single-trait model and from 0.163±0.010 for WG_210_365 to 0.382±0.025 for BWS using the multiple-trait model. The estimates of genetic correlations ranged from -0.35±0.08 between AFC with BF to 0.69±0.04 between WG_B_120 with BWS. Selection for weights gains, REA, and BWS can improve FMW. © 2013 Elsevier B.V.



Back fat thickness, Beef cattle, Female mature weight, Rib eye area, Rump fat, Animalia, Bos

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Livestock Science, v. 155, n. 1, p. 1-7, 2013.