An?lise longitudinal do consumo alimentar residual em bovinos Nelore

Detalhes bibliográficos
Autor(a) principal: Assis, Cl?lia Soares de
Data de Publicação: 2018
Tipo de documento: Dissertação
Idioma: por
Título da fonte: Repositório Institucional da UFVJM
Texto Completo: http://acervo.ufvjm.edu.br/jspui/handle/1/2214
Resumo: O presente trabalho foi realizado com apoio da Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior - Brasil (CAPES) - C?digo de Financiamento 001.
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spelling Assis, Cl?lia Soares deBonafe, Cristina MoreiraVerardo, Lucas LimaSousa, Mariele FreitasPereira, Idalmo GarciaPereira, Idalmo GarciaUniversidade Federal dos Vales do Jequitinhonha e Mucuri (UFVJM)Bonafe, Cristina Moreira2020-04-08T15:08:38Z2020-04-08T15:08:38Z20182018-10-05ASSIS, Cl?lia Soares de. An?lise longitudinal do consumo alimentar residual em bovinos Nelore. 2018. 52 p. Disserta??o (Mestrado) ? Programa de P?s-Gradua??o em Zootecnia, Universidade Federal dos Vales do Jequitinhonha e Mucuri, Diamantina, 2018.http://acervo.ufvjm.edu.br/jspui/handle/1/2214O presente trabalho foi realizado com apoio da Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior - Brasil (CAPES) - C?digo de Financiamento 001.A estima??o de par?metros gen?ticos para o consumo alimentar residual (CAR) ao longo do per?odo de teste pode propiciar a identifica??o dos per?odos de teste em que h? maior variabilidade gen?tica. Objetivou-se ajustar um modelo de regress?o aleat?ria com o uso de polin?mios spline para CAR ao longo do per?odo de avalia??o, a fim de proporcionar um melhor entendimento do comportamento dos componentes de vari?ncia, bem como estimar os par?metros e valores gen?ticos, e identificar os per?odos de teste em que h? maior variabilidade gen?tica. Foram utilizados dados de ingest?o de mat?ria seca e peso de 929 machos Nelore, provenientes de sete provas de desempenho com dura??o de 70 dias. O CAR foi avaliado em diferentes per?odos de dura??o: 14, 28, 42, 56 e 70 dias. Para cada per?odo de avalia??o foram calculados: Ingest?o de Mat?ria Seca (IMS), Ganho M?dio em Peso Di?rio (GMD), Peso Vivo Metab?lico (PVM 0,75) e Ingest?o de Mat?ria Seca estimada (IMSe). Os componentes de vari?ncia foram estimados por meio de uma an?lise bayesiana, via amostragem de Gibbs. Utilizou-se modelo de regress?o aleat?ria com polin?mios lineares do tipo spline contendo cinco n?s para o ajuste da trajet?ria m?dia, dos efeitos aleat?rios (gen?ticos aditivos e ambiente permanente) e considerou-se heterogeneidade de vari?ncia residual. As estimativas de herdabilidade variaram de 0,40 a 0,50. As correla??es gen?ticas entre os per?odos reduzidos e o per?odo completo (70 dias) foram positivas e elevadas, variando de 0,87 a 0,94. O valor do coeficiente de correla??o de Spearman entre o per?odo completo e o per?odo de 56 dias foi de 0,94. Portanto, entre os 93 animais selecionados no per?odo de teste reduzido para 56 dias, 77 deles seriam selecionados no per?odo de teste de 70 dias. A resposta correlacionada para o CAR, aos 56 dias, corresponde a 85% da resposta direta aos 70 dias. Os resultados apontaram que modelos de regress?o aleat?ria com polin?mios lineares do tipo spline podem ser empregados em estudos de efici?ncia alimentar em bovinos, e os testes de efici?ncia alimentar podem ter dura??o de 56 dias, sem que haja perda na predi??o dos valores gen?ticos dos tourinhos.Submitted by Rodrigo Martins Cruz (rodrigo.cruz@ufvjm.edu.br) on 2020-04-08T15:08:19Z No. of bitstreams: 2 license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) clelia_soares_asssis.pdf: 1096455 bytes, checksum: d214b9671c3fc89db0827cd6421c3131 (MD5)Approved for entry into archive by Rodrigo Martins Cruz (rodrigo.cruz@ufvjm.edu.br) on 2020-04-08T15:08:38Z (GMT) No. of bitstreams: 2 license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) clelia_soares_asssis.pdf: 1096455 bytes, checksum: d214b9671c3fc89db0827cd6421c3131 (MD5)Made available in DSpace on 2020-04-08T15:08:38Z (GMT). No. of bitstreams: 2 license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) clelia_soares_asssis.pdf: 1096455 bytes, checksum: d214b9671c3fc89db0827cd6421c3131 (MD5) Previous issue date: 2018Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior (CAPES)Disserta??o (Mestrado) ? Programa de P?s-Gradua??o em Zootecnia, Universidade Federal dos Vales do Jequitinhonha e Mucuri, 2018.The estimation of genetic parameters for residual feed intake (RFI) during performance test may allow the identification of test periods in which there is greater genetic variability. The objective of this study was to adjust a random regression model with the use of spline polynomials for RFI over the evaluation period, in order to provide a better understanding of the behavior of variance components, as well as to estimate genetic parameters and values, and identify the test periods in which there is greater genetic variability. Data of dry matter intake and weight of 929 Nelore males were used, from seven performance tests with durations of 70 days. Ingestion data were used of dry matter and weight of 929 male Nellore, from seven performance tests with duration of 70 days. The RFI was evaluated in different periods of duration: 14, 28, 42, 56 and 70 days. For each evaluation period, Dry matter intake (DMI), Average Daily Gain (ADG), Metabolic Weight (MBW) and Estimated Dry Matter Intake (DMIe) were calculated. The variance components were estimated by Bayesian analysis via Gibbs sampling. A random regression animal model with linear spline polynomials containing five nodes was used to adjust the mean trajectory, random effects (additive genetic and permanent environment), and heterogeneity of residual variance was considered. Heritability estimates ranged from 0,40 to 0,50. Genetic correlations between reduced periods and the whole period (70 days) were positive and high, varying from 0,87 to 0,94. The Spearman?s correlation coefficient values between the full period and the 56 day period was 0,94. Therefore, among the 93 animals selected in the reduced test period for 56 days, 77 of them would be selected in the 70-day test period. The correlated response for CAR at 56 days corresponds to 85% of the direct response at 70 days. The results showed that random regression models with linear polynomials of the spline type can be used in studies of feed efficiency in cattle, and feed efficiency tests can be 56 days in length, without loss in genetic values prediction of young bulls.porUFVJMA concess?o da licen?a deste item refere-se ao ? termo de autoriza??o impresso assinado pelo autor, assim como na licen?a Creative Commons, com as seguintes condi??es: Na qualidade de titular dos direitos de autor da publica??o, autorizo a Universidade Federal dos Vales do Jequitinhonha e Mucuri e o IBICT a disponibilizar por meio de seus reposit?rios, sem ressarcimento dos direitos autorais, de acordo com a Lei n? 9610/98, o texto integral da obra disponibilizada, conforme permiss?es assinaladas, para fins de leitura, impress?o e/ou download, a t?tulo de divulga??o da produ??o cient?fica brasileira, e preserva??o, a partir desta data.info:eu-repo/semantics/openAccessAn?lise longitudinal do consumo alimentar residual em bovinos Neloreinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/masterThesisEfici?ncia alimentarGado de corteRegress?o aleat?riaFeed efficiencySplineBeef cattleFeed efficiencyreponame:Repositório Institucional da UFVJMinstname:Universidade Federal dos Vales do Jequitinhonha e Mucuri (UFVJM)instacron:UFVJMTEXTclelia_soares_asssis.pdf.txtclelia_soares_asssis.pdf.txtExtracted texttext/plain86764http://acervo.ufvjm.edu.br/jspui/bitstream/1/2214/6/clelia_soares_asssis.pdf.txt04f4d4e7f62798a99f6ad25fe2396ac9MD56LICENSElicense.txtlicense.txttext/plain; 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dc.title.pt_BR.fl_str_mv An?lise longitudinal do consumo alimentar residual em bovinos Nelore
title An?lise longitudinal do consumo alimentar residual em bovinos Nelore
spellingShingle An?lise longitudinal do consumo alimentar residual em bovinos Nelore
Assis, Cl?lia Soares de
Efici?ncia alimentar
Gado de corte
Regress?o aleat?ria
Feed efficiency
Spline
Beef cattle
Feed efficiency
title_short An?lise longitudinal do consumo alimentar residual em bovinos Nelore
title_full An?lise longitudinal do consumo alimentar residual em bovinos Nelore
title_fullStr An?lise longitudinal do consumo alimentar residual em bovinos Nelore
title_full_unstemmed An?lise longitudinal do consumo alimentar residual em bovinos Nelore
title_sort An?lise longitudinal do consumo alimentar residual em bovinos Nelore
author Assis, Cl?lia Soares de
author_facet Assis, Cl?lia Soares de
author_role author
dc.contributor.referee.none.fl_str_mv Bonafe, Cristina Moreira
Verardo, Lucas Lima
Sousa, Mariele Freitas
Pereira, Idalmo Garcia
dc.contributor.advisorco.none.fl_str_mv Pereira, Idalmo Garcia
dc.contributor.institution.pt_BR.fl_str_mv Universidade Federal dos Vales do Jequitinhonha e Mucuri (UFVJM)
dc.contributor.author.fl_str_mv Assis, Cl?lia Soares de
dc.contributor.advisor1.fl_str_mv Bonafe, Cristina Moreira
contributor_str_mv Bonafe, Cristina Moreira
dc.subject.keyword.pt_BR.fl_str_mv Efici?ncia alimentar
Gado de corte
Regress?o aleat?ria
Feed efficiency
topic Efici?ncia alimentar
Gado de corte
Regress?o aleat?ria
Feed efficiency
Spline
Beef cattle
Feed efficiency
dc.subject.keyword.en.fl_str_mv Spline
Beef cattle
Feed efficiency
description O presente trabalho foi realizado com apoio da Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior - Brasil (CAPES) - C?digo de Financiamento 001.
publishDate 2018
dc.date.submitted.none.fl_str_mv 2018-10-05
dc.date.issued.fl_str_mv 2018
dc.date.accessioned.fl_str_mv 2020-04-08T15:08:38Z
dc.date.available.fl_str_mv 2020-04-08T15:08:38Z
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
dc.type.driver.fl_str_mv info:eu-repo/semantics/masterThesis
format masterThesis
status_str publishedVersion
dc.identifier.citation.fl_str_mv ASSIS, Cl?lia Soares de. An?lise longitudinal do consumo alimentar residual em bovinos Nelore. 2018. 52 p. Disserta??o (Mestrado) ? Programa de P?s-Gradua??o em Zootecnia, Universidade Federal dos Vales do Jequitinhonha e Mucuri, Diamantina, 2018.
dc.identifier.uri.fl_str_mv http://acervo.ufvjm.edu.br/jspui/handle/1/2214
identifier_str_mv ASSIS, Cl?lia Soares de. An?lise longitudinal do consumo alimentar residual em bovinos Nelore. 2018. 52 p. Disserta??o (Mestrado) ? Programa de P?s-Gradua??o em Zootecnia, Universidade Federal dos Vales do Jequitinhonha e Mucuri, Diamantina, 2018.
url http://acervo.ufvjm.edu.br/jspui/handle/1/2214
dc.language.iso.fl_str_mv por
language por
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.publisher.none.fl_str_mv UFVJM
publisher.none.fl_str_mv UFVJM
dc.source.none.fl_str_mv reponame:Repositório Institucional da UFVJM
instname:Universidade Federal dos Vales do Jequitinhonha e Mucuri (UFVJM)
instacron:UFVJM
instname_str Universidade Federal dos Vales do Jequitinhonha e Mucuri (UFVJM)
instacron_str UFVJM
institution UFVJM
reponame_str Repositório Institucional da UFVJM
collection Repositório Institucional da UFVJM
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