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 | Acesso ao texto completo restrito à biblioteca da Embrapa Arroz e Feijão. Para informações adicionais entre em contato com cnpaf.biblioteca@embrapa.br. |
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Registro Completo |
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Biblioteca(s): |
Embrapa Arroz e Feijão. |
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Data corrente: |
18/07/2007 |
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Data da última atualização: |
20/06/2022 |
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Autoria: |
FARIA, C. U. de; MAGNABOSCO, C. de U.; LOS REYES, A. de; LÔBO, R. B.; BEZERRA, L. A. F.; SAINZ, R. D. |
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Título: |
Bayesian inference on field data for genetic parameters for some reproductive and related traits of Nellore cattle ( Bos indicus). |
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Ano de publicação: |
2007 |
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Fonte/Imprenta: |
Genetics and Molecular Biology, Ribeirão Preto, v. 30, n. 2, p. 343-348, 2007. |
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Idioma: |
Inglês |
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Conteúdo: |
We used Gibbs sampling in single and two-trait animal models to estimate genetic parameters for some reproductive and related traits of Nellore cattle ( Bos indicus). Female traits were age at first calving (AFC), cumulative productivity (CP) and adult weight (AW). For males, scrotal circumferences at 365 and 450 days of age were analyzed. Gibbs sampling using the ?Multiple Trait using Gibbs Sampling under Animal Model? (MTGSAM) program of Van Tassel and Van Vleck was used to estimate the (co)variance components of the traits and conduct genetic analyses. Heritabilities were AFC = 0.26, AW = 0.36 and CP = 0.25 under the single-trait animal model. The mean, mode and median estimates for genetic parameters obtained from the marginal posterior distributions were similar for all traits except AW, which presented lower values for the mode than the mean and median. However, the marginal posterior distributions for the traits studied presented a tendency toward normality. Favorable, but low, negative genetic correlations were found between male scrotal circumference and female age at first calving. The reproductive traits showed medium-magnitude heritabilities, which indicates that these traits should respond to selection and therefore should be included in genetic improvement programs. |
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Palavras-Chave: |
Bayesian inference; Nelore. |
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Thesagro: |
Gado de Corte; Melhoramento Genético Animal; Reprodução. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 02060naa a2200241 a 4500
001 1215425
005 2022-06-20
008 2007 bl --- 0-- u #d
100 1 $aFARIA, C. U. de
245 $aBayesian inference on field data for genetic parameters for some reproductive and related traits of Nellore cattle ( Bos indicus).
260 $c2007
520 $aWe used Gibbs sampling in single and two-trait animal models to estimate genetic parameters for some reproductive and related traits of Nellore cattle ( Bos indicus). Female traits were age at first calving (AFC), cumulative productivity (CP) and adult weight (AW). For males, scrotal circumferences at 365 and 450 days of age were analyzed. Gibbs sampling using the ?Multiple Trait using Gibbs Sampling under Animal Model? (MTGSAM) program of Van Tassel and Van Vleck was used to estimate the (co)variance components of the traits and conduct genetic analyses. Heritabilities were AFC = 0.26, AW = 0.36 and CP = 0.25 under the single-trait animal model. The mean, mode and median estimates for genetic parameters obtained from the marginal posterior distributions were similar for all traits except AW, which presented lower values for the mode than the mean and median. However, the marginal posterior distributions for the traits studied presented a tendency toward normality. Favorable, but low, negative genetic correlations were found between male scrotal circumference and female age at first calving. The reproductive traits showed medium-magnitude heritabilities, which indicates that these traits should respond to selection and therefore should be included in genetic improvement programs.
650 $aGado de Corte
650 $aMelhoramento Genético Animal
650 $aReprodução
653 $aBayesian inference
653 $aNelore
700 1 $aMAGNABOSCO, C. de U.
700 1 $aLOS REYES, A. de
700 1 $aLÔBO, R. B.
700 1 $aBEZERRA, L. A. F.
700 1 $aSAINZ, R. D.
773 $tGenetics and Molecular Biology, Ribeirão Preto$gv. 30, n. 2, p. 343-348, 2007.
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