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Registro Completo |
Biblioteca(s): |
Embrapa Arroz e Feijão; Embrapa Cerrados. |
Data corrente: |
07/05/2021 |
Data da última atualização: |
07/05/2021 |
Tipo da produção científica: |
Artigo em Periódico Indexado |
Autoria: |
BRUNES, L. C.; BALDI, F.; NARCISO, M. G.; LOBO, R. B.; ESPIGOLAN, R.; COSTA, M. F. O.; MAGNABOSCO, C. U. |
Afiliação: |
LUDMILLA C. BRUNES, UFG; FERNANDO BALDI, UNESP, Jaboticabal-SP; MARCELO GONCALVES NARCISO, CNPAF; RAYSILDO B. LOBO, ASSOCIAÇÃO NACIONAL DE CRIADORES, Ribeirão Preto-SP; R. ESPIGOLAN, USP; MARCOS FERNANDO OLIVEIRA E COSTA, CNPAF; CLAUDIO DE ULHOA MAGNABOSCO, CPAC. |
Título: |
Genomic prediction ability for feed efficiency traits using different models and pseudo-phenotypes under several validation strategies in Nelore cattle. |
Ano de publicação: |
2021 |
Fonte/Imprenta: |
Animal. The International Journal of Animal Biosciences, v. 15, 100085, 2021. |
ISSN: |
1751-7311 |
DOI: |
https://doi.org/10.1016/j.animal.2020.100085 |
Idioma: |
Inglês |
Conteúdo: |
There is a growing interest to improve feed efficiency (FE) traits in cattle. The genomic selection was proposed to improve these traits since they are difficult and expensive to measure. Up to date, there are scarce studies about the implementation of genomic selection for FE traits in indicine cattle under different scenarios of pseudo-phenotypes, models, and validation strategies on a commercial large scale. Thus, the aim was to evaluate the feasibility of genomic selection implementation for FE traits in Nelore cattle applying different models and pseudo-phenotypes under validation strategies. Phenotypic and genotypic information from 4 329 and 3 467 animals were used, respectively, which were tested for residual feed intake, DM intake, feed efficiency, feed conversion ratio, residual BW gain, and residual intake and BW gain. Six prediction methods were used: single-step genomic best linear unbiased prediction, Bayes A, Bayes B, Bayes Cπ, Bayesian least absolute shrinkage and selection operator (BLASSO), and Bayes R. Phenotypes adjusted for fixed effects (Y*), estimated breeding value (EBV), and EBV deregressed (DEBV) were used as pseudo-phenotypes. The validation approaches used were: (1) random: the data was randomly divided into ten subsets and the validation was done in each subset at a time; (2) age: the partition into training and testing sets was based on year of birth and testing animals were born after 2016; and (3) EBV accuracy: the data was split into two groups, being animals with accuracy above 0.45 the training set; and below 0.45 the validation set. In the analyses that used the Y* as pseudo-phenotype, prediction ability (PA) was obtained by dividing the correlation between pseudo-phenotype and genomic EBV (GEBV) by the square root of the heritability of the trait. When EBV and DEBV were used as the pseudo-phenotype, the simple correlation of this quantity with the GEBV was considered as PA. The prediction methods show similar results for PA and bias. The random cross-validation presented higher PA (0.17) than EBV accuracy (0.14) and age (0.13). The PA was higher for Y* than for EBV and DEBV (30.0 and 34.3%, respectively). Random validation presented the highest PA, being indicated for use in populations composed mainly of young animals and traits with few generations of data recording. For high heritability traits, the validation can be done by age, enabling the prediction of the next-generation genetic merit. These results would support breeders to identify genomic approaches that are more viable for genomic prediction for FE-related traits. MenosThere is a growing interest to improve feed efficiency (FE) traits in cattle. The genomic selection was proposed to improve these traits since they are difficult and expensive to measure. Up to date, there are scarce studies about the implementation of genomic selection for FE traits in indicine cattle under different scenarios of pseudo-phenotypes, models, and validation strategies on a commercial large scale. Thus, the aim was to evaluate the feasibility of genomic selection implementation for FE traits in Nelore cattle applying different models and pseudo-phenotypes under validation strategies. Phenotypic and genotypic information from 4 329 and 3 467 animals were used, respectively, which were tested for residual feed intake, DM intake, feed efficiency, feed conversion ratio, residual BW gain, and residual intake and BW gain. Six prediction methods were used: single-step genomic best linear unbiased prediction, Bayes A, Bayes B, Bayes Cπ, Bayesian least absolute shrinkage and selection operator (BLASSO), and Bayes R. Phenotypes adjusted for fixed effects (Y*), estimated breeding value (EBV), and EBV deregressed (DEBV) were used as pseudo-phenotypes. The validation approaches used were: (1) random: the data was randomly divided into ten subsets and the validation was done in each subset at a time; (2) age: the partition into training and testing sets was based on year of birth and testing animals were born after 2016; and (3) EBV accuracy: the data was split into two... Mostrar Tudo |
Palavras-Chave: |
Residual body weight gain; Residual feed intake; Single nucleotide polymorphisms. |
Thesagro: |
Gado Nelore; Gado Zebu; Genética Animal. |
Thesaurus Nal: |
Animal breeding; Feed intake; Genomics; Zebu. |
Categoria do assunto: |
L Ciência Animal e Produtos de Origem Animal |
Marc: |
LEADER 03682naa a2200337 a 4500 001 2131718 005 2021-05-07 008 2021 bl uuuu u00u1 u #d 022 $a1751-7311 024 7 $ahttps://doi.org/10.1016/j.animal.2020.100085$2DOI 100 1 $aBRUNES, L. C. 245 $aGenomic prediction ability for feed efficiency traits using different models and pseudo-phenotypes under several validation strategies in Nelore cattle.$h[electronic resource] 260 $c2021 520 $aThere is a growing interest to improve feed efficiency (FE) traits in cattle. The genomic selection was proposed to improve these traits since they are difficult and expensive to measure. Up to date, there are scarce studies about the implementation of genomic selection for FE traits in indicine cattle under different scenarios of pseudo-phenotypes, models, and validation strategies on a commercial large scale. Thus, the aim was to evaluate the feasibility of genomic selection implementation for FE traits in Nelore cattle applying different models and pseudo-phenotypes under validation strategies. Phenotypic and genotypic information from 4 329 and 3 467 animals were used, respectively, which were tested for residual feed intake, DM intake, feed efficiency, feed conversion ratio, residual BW gain, and residual intake and BW gain. Six prediction methods were used: single-step genomic best linear unbiased prediction, Bayes A, Bayes B, Bayes Cπ, Bayesian least absolute shrinkage and selection operator (BLASSO), and Bayes R. Phenotypes adjusted for fixed effects (Y*), estimated breeding value (EBV), and EBV deregressed (DEBV) were used as pseudo-phenotypes. The validation approaches used were: (1) random: the data was randomly divided into ten subsets and the validation was done in each subset at a time; (2) age: the partition into training and testing sets was based on year of birth and testing animals were born after 2016; and (3) EBV accuracy: the data was split into two groups, being animals with accuracy above 0.45 the training set; and below 0.45 the validation set. In the analyses that used the Y* as pseudo-phenotype, prediction ability (PA) was obtained by dividing the correlation between pseudo-phenotype and genomic EBV (GEBV) by the square root of the heritability of the trait. When EBV and DEBV were used as the pseudo-phenotype, the simple correlation of this quantity with the GEBV was considered as PA. The prediction methods show similar results for PA and bias. The random cross-validation presented higher PA (0.17) than EBV accuracy (0.14) and age (0.13). The PA was higher for Y* than for EBV and DEBV (30.0 and 34.3%, respectively). Random validation presented the highest PA, being indicated for use in populations composed mainly of young animals and traits with few generations of data recording. For high heritability traits, the validation can be done by age, enabling the prediction of the next-generation genetic merit. These results would support breeders to identify genomic approaches that are more viable for genomic prediction for FE-related traits. 650 $aAnimal breeding 650 $aFeed intake 650 $aGenomics 650 $aZebu 650 $aGado Nelore 650 $aGado Zebu 650 $aGenética Animal 653 $aResidual body weight gain 653 $aResidual feed intake 653 $aSingle nucleotide polymorphisms 700 1 $aBALDI, F. 700 1 $aNARCISO, M. G. 700 1 $aLOBO, R. B. 700 1 $aESPIGOLAN, R. 700 1 $aCOSTA, M. F. O. 700 1 $aMAGNABOSCO, C. U. 773 $tAnimal. The International Journal of Animal Biosciences$gv. 15, 100085, 2021.
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Registro original: |
Embrapa Arroz e Feijão (CNPAF) |
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Registro Completo
Biblioteca(s): |
Embrapa Florestas. |
Data corrente: |
17/01/2013 |
Data da última atualização: |
17/01/2013 |
Tipo da produção científica: |
Artigo em Periódico Indexado |
Circulação/Nível: |
C - 0 |
Autoria: |
BROWN, G. G.; JAMES, S. W.; MARINI-FILHO, O. J. |
Afiliação: |
GEORGE GARDNER BROWN, CNPF; Samuel W. James, University of Iowa; Onildo J. Marini-Filho, CECAT, ICMBIO. |
Título: |
Avaliação do risco de extinção do minhocuçu: Rhinodrilus fafner Michaelsen, 1918. |
Ano de publicação: |
2012 |
Fonte/Imprenta: |
Biodiversidade Brasileira, v. 2, n. 2, p. 140-144, 2012. |
Série: |
2236-2886 |
Idioma: |
Português |
Notas: |
Seção: Avaliação do estado de conservação das espécies da fauna brasileira. |
Palavras-Chave: |
Extinção; Minhocuçu; Rhinodrillus fafner. |
Categoria do assunto: |
-- |
URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/74469/1/2012-GeorgeB-BB-RhinodrilusFafner.pdf
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Marc: |
LEADER 00651naa a2200193 a 4500 001 1945546 005 2013-01-17 008 2012 bl uuuu u00u1 u #d 100 1 $aBROWN, G. G. 245 $aAvaliação do risco de extinção do minhocuçu$bRhinodrilus fafner Michaelsen, 1918.$h[electronic resource] 260 $c2012 490 $a2236-2886 500 $aSeção: Avaliação do estado de conservação das espécies da fauna brasileira. 653 $aExtinção 653 $aMinhocuçu 653 $aRhinodrillus fafner 700 1 $aJAMES, S. W. 700 1 $aMARINI-FILHO, O. J. 773 $tBiodiversidade Brasileira$gv. 2, n. 2, p. 140-144, 2012.
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