Parâmetros genéticos de caracteres quantitativos relacionados à produtividade de rebanhos selecionados da raça nelore
Autor(a) principal: | |
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Data de Publicação: | 2016 |
Tipo de documento: | Dissertação |
Idioma: | por |
Título da fonte: | Repositório Institucional da UFG |
Texto Completo: | http://repositorio.bc.ufg.br/tede/handle/tede/5754 |
Resumo: | Most of the Brazilian beef is produced in the Cerrado region, where beef cattle consists of zebu breeds well adapted to the creation of conditions in the tropics. Today, the biggest challenge for the beef cattle in the Cerrado is to optimize the economic potential in a sustainable manner, while preserving this biome rich in biological diversity. Despite this favorable scenario, economic agents involved in beef production and marketing process recognize the low levels of productivity of beef cattle in Brazil. In this way, to improve the Nellore productivity levels is essential for the country to avidly compete in the international market. Thus, the aim of this study was to estimate the components of (co) variances and genetic parameters of traits of economic importance, being, birth weight (BW), weight at 120 (P120) 210 (P210) 365 (P365) and 450 days of age (P450), adult cow weight (PAV), ribeye area (REA), fat thickness obtained between the 12th and 13th ribs (EG), subcutaneous fat thickness on the back (EGP8), scrotal circumference at 365 days of age (PE365), scrotal circumference at 450 days of age (PE450), age at first calving in months (IPP), and accumulated productivity in kilograms of calves weaned per cow / year (PAC) of Nelore cattle raised extensively on pasture. The data set for analysis in this study was obtained through five participating herds of Nelore Brazil Program of the National Association of Breeders and Researchers (ANCP), totaling 34,137 animals. Genetic parameters were estimated in univariate and two-trait animal models using the EM-REML algorithm available in the computational package REMLF90. Heritability estimates for direct additive effects were 0.27, 0.20, 0.20, 0.25, 0.36, 0.17, 0.37, 0.46, 0.10, 0.14, 0.53, 0.19, 0.25 for PN, P120, P210, P365, P450, PAV, PE365, PE450, IPP, PAC, AOL, EG and EGP8 respectively. The heritability for maternal additive effects were 0.04, 0.09, 0.09 and 0.04 for PN, P120, P210 and P365, respectively. The correlation between growth estimates of characters with the housing ranged from -0.72 to 0.97, and between growth and reproductive characters ranged from -0.70 to 0.97 and carcass characters with reproductive varied of -0.70 to 0.95, with all beneficial correlations. Estimates of heritability for the traits studied, except the IPP and PAC obtained in this study allow us to conclude that there is genetic variability in the studied herds, indicating the possibility of genetic progress if they are included as selection criteria. The obtained genetic correlations were positive, selection for increased a result in the improvement of the other. |
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Viu , Marco Antônio de Oliveirahttp://lattes.cnpq.br/7829414158162743Magnabosco, Claudio Ulhoahttp://lattes.cnpq.br/1852112832119187Lopes, Dyomar Toledohttp://lattes.cnpq.br/3243593904027807Viu , Marco Antônio de OliveiraCoelho , Alexandre Siqueira GuedesPádua, João Teodorohttp://lattes.cnpq.br/9164384533352493Guimarães, Nayanny Corrêa2016-07-28T14:39:01Z2016-03-10GUIMARAES, N. C. Parâmetros genéticos de caracteres quantitativos relacionados à produtividade de rebanhos selecionados da raça nelore. 2016. 83 f. Dissertação (Mestrado em Zootecnia) - Universidade Federal de Goiás, 2016, Goiânia.http://repositorio.bc.ufg.br/tede/handle/tede/5754Most of the Brazilian beef is produced in the Cerrado region, where beef cattle consists of zebu breeds well adapted to the creation of conditions in the tropics. Today, the biggest challenge for the beef cattle in the Cerrado is to optimize the economic potential in a sustainable manner, while preserving this biome rich in biological diversity. Despite this favorable scenario, economic agents involved in beef production and marketing process recognize the low levels of productivity of beef cattle in Brazil. In this way, to improve the Nellore productivity levels is essential for the country to avidly compete in the international market. Thus, the aim of this study was to estimate the components of (co) variances and genetic parameters of traits of economic importance, being, birth weight (BW), weight at 120 (P120) 210 (P210) 365 (P365) and 450 days of age (P450), adult cow weight (PAV), ribeye area (REA), fat thickness obtained between the 12th and 13th ribs (EG), subcutaneous fat thickness on the back (EGP8), scrotal circumference at 365 days of age (PE365), scrotal circumference at 450 days of age (PE450), age at first calving in months (IPP), and accumulated productivity in kilograms of calves weaned per cow / year (PAC) of Nelore cattle raised extensively on pasture. The data set for analysis in this study was obtained through five participating herds of Nelore Brazil Program of the National Association of Breeders and Researchers (ANCP), totaling 34,137 animals. Genetic parameters were estimated in univariate and two-trait animal models using the EM-REML algorithm available in the computational package REMLF90. Heritability estimates for direct additive effects were 0.27, 0.20, 0.20, 0.25, 0.36, 0.17, 0.37, 0.46, 0.10, 0.14, 0.53, 0.19, 0.25 for PN, P120, P210, P365, P450, PAV, PE365, PE450, IPP, PAC, AOL, EG and EGP8 respectively. The heritability for maternal additive effects were 0.04, 0.09, 0.09 and 0.04 for PN, P120, P210 and P365, respectively. The correlation between growth estimates of characters with the housing ranged from -0.72 to 0.97, and between growth and reproductive characters ranged from -0.70 to 0.97 and carcass characters with reproductive varied of -0.70 to 0.95, with all beneficial correlations. Estimates of heritability for the traits studied, except the IPP and PAC obtained in this study allow us to conclude that there is genetic variability in the studied herds, indicating the possibility of genetic progress if they are included as selection criteria. The obtained genetic correlations were positive, selection for increased a result in the improvement of the other.A maior parte da carne bovina brasileira é produzida na região do Cerrado, onde a pecuária de corte é constituída basicamente por raças zebuínas bem adaptadas às condições de criação nos trópicos. Hoje, o maior desafio para esta atividade é otimizar o seu potencial econômico de maneira sustentável, ao mesmo tempo em que se preserva esse bioma rico em diversidade biológica. Apesar desse cenário favorável, os agentes econômicos envolvidos no processo de produção e comercialização da carne bovina reconhecem os baixos índices de produtividade da bovinocultura de corte no Brasil. Desta maneira, melhorar os índices de produtividade da raça Nelore é fundamental para que o País possa competir avidamente no mercado internacional. Assim, objetivou-se com este estudo estimar os componentes de (co)variâncias e parâmetros genéticos de caracteres de importância econômica, sendo, peso ao nascimento (PN), peso aos 120 (P120), 210 (P210), 365 (P365) e 450 dias de idade (P450), peso adulto da vaca (PAV), área de olho de lombo (AOL), espessura de gordura subcutânea obtido entre as 12ª e 13ª costelas (EG), espessura de gordura subcutânea na garupa (EGP8), perímetro escrotal aos 365 dias de idade (PE365) perímetro escrotal aos 450 dias de idade (PE450), idade ao primeiro parto em meses (IPP) e produtividade acumulada em kg de bezerros desmamados por vaca/ano (PAC) de bovinos da raça Nelore criados extensivamente a pasto. O conjunto de dados para análise do presente estudo foi obtido através de cinco rebanhos participantes do Programa Nelore Brasil da Associação Nacional de Criadores e Pesquisadores (ANCP), totalizando 34.137 animais. Os parâmetros genéticos foram estimados em análises uni e bicaracterísticas sob modelo animal, usando o algoritmo EM-REML disponível no pacote computacional REMLF90. As estimativas de herdabilidade para efeitos aditivos diretos foram de 0,27; 0,20; 0,20; 0,25; 0,36; 0,17; 0,37; 0,46; 0,10; 0,14; 0,53; 0,19; e 0,25 para PN; P120; P210; P365; P450; PAV; PE365; PE450; IPP; PAC; AOL; EG; e EGP8, respectivamente. As herdabilidades para os efeitos aditivos maternos foram, 0,04; 0,09; 0,09; e 0,04 para PN; P120; P210; e P365, respectivamente. As estimativas de correlação entre caracteres de crescimento com os de carcaça variaram de -0,72 a 0,97; entre os caracteres de crescimento e reprodutivos variaram entre -0,70 e 0,97; e os caracteres de carcaça com os reprodutivos variaram de -0,70 a 0,95, sendo todas correlações benéficas. As estimativas de herdabilidades para as características estudadas obtidas neste estudo, com exceção da IPP e PAC, permitem concluir que existe variabilidade genética nos rebanhos estudados, indicando a possibilidade de progresso genético se as mesmas forem incluídas como critérios de seleção. As correlações genéticas obtidas foram favoráveis, ou seja, a seleção para aumento de uma acarretará na melhoria da outra.Submitted by Cássia Santos (cassia.bcufg@gmail.com) on 2016-07-28T13:01:05Z No. of bitstreams: 2 Dissertação - Nayanny Correa Guimaraes - 2016.pdf: 2074918 bytes, checksum: c69670b4213e3c4a5cc5b6cb1bf0c9de (MD5) license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5)Approved for entry into archive by Luciana Ferreira (lucgeral@gmail.com) on 2016-07-28T14:39:01Z (GMT) No. of bitstreams: 2 Dissertação - Nayanny Correa Guimaraes - 2016.pdf: 2074918 bytes, checksum: c69670b4213e3c4a5cc5b6cb1bf0c9de (MD5) license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5)Made available in DSpace on 2016-07-28T14:39:01Z (GMT). No. of bitstreams: 2 Dissertação - Nayanny Correa Guimaraes - 2016.pdf: 2074918 bytes, checksum: c69670b4213e3c4a5cc5b6cb1bf0c9de (MD5) license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) Previous issue date: 2016-03-10Coordenação de Aperfeiçoamento de Pessoal de Nível Superior - CAPESapplication/pdfporUniversidade Federal de GoiásPrograma de Pós-graduação em Zootecnia (EVZ)UFGBrasilEscola de Veterinária e Zootecnia - EVZ (RG)http://creativecommons.org/licenses/by-nc-nd/4.0/info:eu-repo/semantics/openAccessCarcaçaCrescimentoÍndices de seleçãoParâmetros genéticosReproduçãoCarcassGenetic parametersGrowthReproductionSelection indexZOOTECNIA::PRODUCAO ANIMALParâmetros genéticos de caracteres quantitativos relacionados à produtividade de rebanhos selecionados da raça neloreGenetic parameters of quantitative trait related to selected nellore cattles productiviyinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/masterThesis-8695879823182088786600600600600-6217552114249094582-75137796603725949922075167498588264571reponame:Repositório Institucional da UFGinstname:Universidade Federal de Goiás (UFG)instacron:UFGLICENSElicense.txtlicense.txttext/plain; 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dc.title.por.fl_str_mv |
Parâmetros genéticos de caracteres quantitativos relacionados à produtividade de rebanhos selecionados da raça nelore |
dc.title.alternative.eng.fl_str_mv |
Genetic parameters of quantitative trait related to selected nellore cattles productiviy |
title |
Parâmetros genéticos de caracteres quantitativos relacionados à produtividade de rebanhos selecionados da raça nelore |
spellingShingle |
Parâmetros genéticos de caracteres quantitativos relacionados à produtividade de rebanhos selecionados da raça nelore Guimarães, Nayanny Corrêa Carcaça Crescimento Índices de seleção Parâmetros genéticos Reprodução Carcass Genetic parameters Growth Reproduction Selection index ZOOTECNIA::PRODUCAO ANIMAL |
title_short |
Parâmetros genéticos de caracteres quantitativos relacionados à produtividade de rebanhos selecionados da raça nelore |
title_full |
Parâmetros genéticos de caracteres quantitativos relacionados à produtividade de rebanhos selecionados da raça nelore |
title_fullStr |
Parâmetros genéticos de caracteres quantitativos relacionados à produtividade de rebanhos selecionados da raça nelore |
title_full_unstemmed |
Parâmetros genéticos de caracteres quantitativos relacionados à produtividade de rebanhos selecionados da raça nelore |
title_sort |
Parâmetros genéticos de caracteres quantitativos relacionados à produtividade de rebanhos selecionados da raça nelore |
author |
Guimarães, Nayanny Corrêa |
author_facet |
Guimarães, Nayanny Corrêa |
author_role |
author |
dc.contributor.advisor1.fl_str_mv |
Viu , Marco Antônio de Oliveira |
dc.contributor.advisor1Lattes.fl_str_mv |
http://lattes.cnpq.br/7829414158162743 |
dc.contributor.advisor-co1.fl_str_mv |
Magnabosco, Claudio Ulhoa |
dc.contributor.advisor-co1Lattes.fl_str_mv |
http://lattes.cnpq.br/1852112832119187 |
dc.contributor.advisor-co2.fl_str_mv |
Lopes, Dyomar Toledo |
dc.contributor.advisor-co2Lattes.fl_str_mv |
http://lattes.cnpq.br/3243593904027807 |
dc.contributor.referee1.fl_str_mv |
Viu , Marco Antônio de Oliveira |
dc.contributor.referee2.fl_str_mv |
Coelho , Alexandre Siqueira Guedes |
dc.contributor.referee3.fl_str_mv |
Pádua, João Teodoro |
dc.contributor.authorLattes.fl_str_mv |
http://lattes.cnpq.br/9164384533352493 |
dc.contributor.author.fl_str_mv |
Guimarães, Nayanny Corrêa |
contributor_str_mv |
Viu , Marco Antônio de Oliveira Magnabosco, Claudio Ulhoa Lopes, Dyomar Toledo Viu , Marco Antônio de Oliveira Coelho , Alexandre Siqueira Guedes Pádua, João Teodoro |
dc.subject.por.fl_str_mv |
Carcaça Crescimento Índices de seleção Parâmetros genéticos Reprodução |
topic |
Carcaça Crescimento Índices de seleção Parâmetros genéticos Reprodução Carcass Genetic parameters Growth Reproduction Selection index ZOOTECNIA::PRODUCAO ANIMAL |
dc.subject.eng.fl_str_mv |
Carcass Genetic parameters Growth Reproduction Selection index |
dc.subject.cnpq.fl_str_mv |
ZOOTECNIA::PRODUCAO ANIMAL |
description |
Most of the Brazilian beef is produced in the Cerrado region, where beef cattle consists of zebu breeds well adapted to the creation of conditions in the tropics. Today, the biggest challenge for the beef cattle in the Cerrado is to optimize the economic potential in a sustainable manner, while preserving this biome rich in biological diversity. Despite this favorable scenario, economic agents involved in beef production and marketing process recognize the low levels of productivity of beef cattle in Brazil. In this way, to improve the Nellore productivity levels is essential for the country to avidly compete in the international market. Thus, the aim of this study was to estimate the components of (co) variances and genetic parameters of traits of economic importance, being, birth weight (BW), weight at 120 (P120) 210 (P210) 365 (P365) and 450 days of age (P450), adult cow weight (PAV), ribeye area (REA), fat thickness obtained between the 12th and 13th ribs (EG), subcutaneous fat thickness on the back (EGP8), scrotal circumference at 365 days of age (PE365), scrotal circumference at 450 days of age (PE450), age at first calving in months (IPP), and accumulated productivity in kilograms of calves weaned per cow / year (PAC) of Nelore cattle raised extensively on pasture. The data set for analysis in this study was obtained through five participating herds of Nelore Brazil Program of the National Association of Breeders and Researchers (ANCP), totaling 34,137 animals. Genetic parameters were estimated in univariate and two-trait animal models using the EM-REML algorithm available in the computational package REMLF90. Heritability estimates for direct additive effects were 0.27, 0.20, 0.20, 0.25, 0.36, 0.17, 0.37, 0.46, 0.10, 0.14, 0.53, 0.19, 0.25 for PN, P120, P210, P365, P450, PAV, PE365, PE450, IPP, PAC, AOL, EG and EGP8 respectively. The heritability for maternal additive effects were 0.04, 0.09, 0.09 and 0.04 for PN, P120, P210 and P365, respectively. The correlation between growth estimates of characters with the housing ranged from -0.72 to 0.97, and between growth and reproductive characters ranged from -0.70 to 0.97 and carcass characters with reproductive varied of -0.70 to 0.95, with all beneficial correlations. Estimates of heritability for the traits studied, except the IPP and PAC obtained in this study allow us to conclude that there is genetic variability in the studied herds, indicating the possibility of genetic progress if they are included as selection criteria. The obtained genetic correlations were positive, selection for increased a result in the improvement of the other. |
publishDate |
2016 |
dc.date.accessioned.fl_str_mv |
2016-07-28T14:39:01Z |
dc.date.issued.fl_str_mv |
2016-03-10 |
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 |
GUIMARAES, N. C. Parâmetros genéticos de caracteres quantitativos relacionados à produtividade de rebanhos selecionados da raça nelore. 2016. 83 f. Dissertação (Mestrado em Zootecnia) - Universidade Federal de Goiás, 2016, Goiânia. |
dc.identifier.uri.fl_str_mv |
http://repositorio.bc.ufg.br/tede/handle/tede/5754 |
identifier_str_mv |
GUIMARAES, N. C. Parâmetros genéticos de caracteres quantitativos relacionados à produtividade de rebanhos selecionados da raça nelore. 2016. 83 f. Dissertação (Mestrado em Zootecnia) - Universidade Federal de Goiás, 2016, Goiânia. |
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Universidade Federal de Goiás |
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UFG |
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Brasil |
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Escola de Veterinária e Zootecnia - EVZ (RG) |
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Universidade Federal de Goiás |
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