期刊
LIVESTOCK SCIENCE
卷 155, 期 1, 页码 1-7出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.livsci.2013.04.004
关键词
Back fat thickness; Beef cattle; Female mature weight; Rib eye area; Rump fat
资金
- Fundacao de Amparo a Pesquisa do Estado de Sao Paulo (FAPESP)
- CAPES (Coordenacao de Aperfeicoamento de Pessoal de Nivel Superior/Programa de Pos-Graduacao em Genetica e Melhoramento Animal, FCAV/UNESP)
- CNPq (Conselho Nacional de Desenvolvimento Cientifico e Tecnologico)
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. (C) 2013 Elsevier B.V. All rights reserved.
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