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Registro Completo |
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Biblioteca(s): |
Embrapa Agropecuária Oeste; Embrapa Milho e Sorgo. |
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Data corrente: |
24/01/1997 |
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Data da última atualização: |
17/06/2010 |
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Autoria: |
PEREIRA FILHO, I. A. |
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Título: |
Comportamento dos cultivares de milho (Zea mays L.) "Piranao" e "Centralmex" em diferentes condicoes de ambientes, espacamentos e niveis de nitrogenio. |
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Ano de publicação: |
1977 |
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Fonte/Imprenta: |
84 f. 1977. |
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Idioma: |
Português |
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Notas: |
Tese (Mestrado) - Escola Superior de Agricultura de Lavras, Lavras. |
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Conteúdo: |
O trabalho foi realizado em quatro localidades do Sul de Minas Gerais, com o objetivo de estudar o comportamento de dois cultivares de milho em diferentes condicoes de ambientes, espacamentos e niveis de nitrogenio. Os ensaios foram conduzidos nos anos agricolas de 1973/74 a 1975/76 em Lavras, 1974/75 em Nepomuceno e 1975/76 em Caldas e Lambari. Os cultivares utilizados foram o "Centralmex" e o "Piranao", com espacamentos de 50, 75 e 100 centimetros nas entrelinhas e com adubacoes 0,40, 80 e 12- kg/ha de nitrogenio. O delineamento experimental foi o de blocos casualizados com parcelas sub-divididas e quatro repeticoes. As parcelas foram constituidas pelos cultivares, as subparcelas pelos espacamentos e as subparcelas pelos niveis de nitrogenio. Analisaram-se as seguintes caracteristicas: diametro do colmo, altura da planta e espiga, plantas acamadas e quebradas, "stand final, peso de 100 graos, percentagem de proteina dos graos e producao. Em Lavras e Nepomuceno, o cultivar "Piranao" apresentou maior diametro do colmo que o "Centralmex". Em Lambari e Nepomuceno, mostrou menor indice de plantas acamadas e quebradas; com melhor "stand" final em Caldas e Lambari. O "Centralmex" apresentou maior peso de 100 graos em Lambari e percentagem de proteina em Nepomuceno. Os cultivares nao apresentaram diferenca quanto a producao de graos. O espacamento de 100 centimetros aumentou o diametro do colmo e peso de 100 graos em todas as localidades; altura da planta e espiga em Lambari e Lavras e "Stand" final em Nepomuceno (...) MenosO trabalho foi realizado em quatro localidades do Sul de Minas Gerais, com o objetivo de estudar o comportamento de dois cultivares de milho em diferentes condicoes de ambientes, espacamentos e niveis de nitrogenio. Os ensaios foram conduzidos nos anos agricolas de 1973/74 a 1975/76 em Lavras, 1974/75 em Nepomuceno e 1975/76 em Caldas e Lambari. Os cultivares utilizados foram o "Centralmex" e o "Piranao", com espacamentos de 50, 75 e 100 centimetros nas entrelinhas e com adubacoes 0,40, 80 e 12- kg/ha de nitrogenio. O delineamento experimental foi o de blocos casualizados com parcelas sub-divididas e quatro repeticoes. As parcelas foram constituidas pelos cultivares, as subparcelas pelos espacamentos e as subparcelas pelos niveis de nitrogenio. Analisaram-se as seguintes caracteristicas: diametro do colmo, altura da planta e espiga, plantas acamadas e quebradas, "stand final, peso de 100 graos, percentagem de proteina dos graos e producao. Em Lavras e Nepomuceno, o cultivar "Piranao" apresentou maior diametro do colmo que o "Centralmex". Em Lambari e Nepomuceno, mostrou menor indice de plantas acamadas e quebradas; com melhor "stand" final em Caldas e Lambari. O "Centralmex" apresentou maior peso de 100 graos em Lambari e percentagem de proteina em Nepomuceno. Os cultivares nao apresentaram diferenca quanto a producao de graos. O espacamento de 100 centimetros aumentou o diametro do colmo e peso de 100 graos em todas as localidades; altura da planta e espiga em Lambari e Lav... Mostrar Tudo |
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Palavras-Chave: |
Bambui; Brasil; Caldas; Lavras; Maize; Minas Gerais; Nepomuceno; South; Spacing; Sul. |
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Thesagro: |
Adubação; Espaçamento; Milho; Nitrogênio; Zea Mays. |
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Thesaurus Nal: |
Brazil; fertilizers; nitrogen. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 02443nam a2200337 a 4500
001 1855429
005 2010-06-17
008 1977 bl uuuu m 00u1 u #d
100 1 $aPEREIRA FILHO, I. A.
245 $aComportamento dos cultivares de milho (Zea mays L.) "Piranao" e "Centralmex" em diferentes condicoes de ambientes, espacamentos e niveis de nitrogenio.
260 $a84 f. 1977.$c1977
500 $aTese (Mestrado) - Escola Superior de Agricultura de Lavras, Lavras.
520 $aO trabalho foi realizado em quatro localidades do Sul de Minas Gerais, com o objetivo de estudar o comportamento de dois cultivares de milho em diferentes condicoes de ambientes, espacamentos e niveis de nitrogenio. Os ensaios foram conduzidos nos anos agricolas de 1973/74 a 1975/76 em Lavras, 1974/75 em Nepomuceno e 1975/76 em Caldas e Lambari. Os cultivares utilizados foram o "Centralmex" e o "Piranao", com espacamentos de 50, 75 e 100 centimetros nas entrelinhas e com adubacoes 0,40, 80 e 12- kg/ha de nitrogenio. O delineamento experimental foi o de blocos casualizados com parcelas sub-divididas e quatro repeticoes. As parcelas foram constituidas pelos cultivares, as subparcelas pelos espacamentos e as subparcelas pelos niveis de nitrogenio. Analisaram-se as seguintes caracteristicas: diametro do colmo, altura da planta e espiga, plantas acamadas e quebradas, "stand final, peso de 100 graos, percentagem de proteina dos graos e producao. Em Lavras e Nepomuceno, o cultivar "Piranao" apresentou maior diametro do colmo que o "Centralmex". Em Lambari e Nepomuceno, mostrou menor indice de plantas acamadas e quebradas; com melhor "stand" final em Caldas e Lambari. O "Centralmex" apresentou maior peso de 100 graos em Lambari e percentagem de proteina em Nepomuceno. Os cultivares nao apresentaram diferenca quanto a producao de graos. O espacamento de 100 centimetros aumentou o diametro do colmo e peso de 100 graos em todas as localidades; altura da planta e espiga em Lambari e Lavras e "Stand" final em Nepomuceno (...)
650 $aBrazil
650 $afertilizers
650 $anitrogen
650 $aAdubação
650 $aEspaçamento
650 $aMilho
650 $aNitrogênio
650 $aZea Mays
653 $aBambui
653 $aBrasil
653 $aCaldas
653 $aLavras
653 $aMaize
653 $aMinas Gerais
653 $aNepomuceno
653 $aSouth
653 $aSpacing
653 $aSul
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Registro original: |
Embrapa Agropecuária Oeste (CPAO) |
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Registro Completo
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Biblioteca(s): |
Embrapa Gado de Leite. |
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Data corrente: |
15/02/2017 |
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Data da última atualização: |
30/01/2023 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Circulação/Nível: |
B - 1 |
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Autoria: |
LÔBO, R. B.; NKRUMAH, D.; GROSSI, D. do A.; BARROS, P. S. de; PAIVA, P.; BEZERRA, L. A. F.; OLIVEIRA, H. N. de; SILVA, M. V. G. B. |
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Afiliação: |
Raysildo Barbosa Lôbo, USP; Donald Nkrumah, Pfizer Animal Genetics - Kalamazoo, MI, USA; Daniela do Amaral Grossi, ANCP; Priscila Sales de Barros, Pfizer Animal Genetics - SP; Pablo Paiva, Pfizer Saúde Animal - SP; Luiz Antônio Framatino Bezerra, USP; Henrique Nunes de Oliveira, UNESP; MARCOS VINICIUS GUALBERTO B SILVA, CNPGL. |
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Título: |
Implementation of DNA markers to produce genomically - enhanced EPDs in Nellore cattle. |
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Ano de publicação: |
2011 |
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Fonte/Imprenta: |
Acta Scientiae Veterinariae, v. 39, suppl. 1, p. s23-s27, 2011. |
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Idioma: |
Inglês |
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Conteúdo: |
Background: The sequencing and publication of the cattle genome and the identification of single nucleotide polymorphism (SNP) molecular markers have provided new tools for animal genetic evaluation and genomic-enhanced selection. These new tools aim to increase the accuracy and scope of selection while decreasing generation interval. The objective of this study was to evaluate the enhancement of accuracy caused by the use of genomic information (Clarifide® - Pfizer) on genetic evaluation of Brazilian Nellore cattle. Review: The application of genome-wide association studies (GWAS) is recognized as one of the most practical approaches to modern genetic improvement. Genomic selection is perhaps most suited to the improvement of traits with low heritability in zebu cattle. The primary interest in livestock genomics has been to estimate the effects of all the markers on the chip, conduct cross-validation to determine accuracy, and apply the resulting information in GWAS either alone [9] or in combination with bull test and pedigree-based genetic evaluation data. The cost of SNP50K genotyping however limits the commercial application of GWAS based on all the SNPs on the chip. However, reasonable predictability and accuracy can be achieved in GWAS by using an assay that contains an optimally selected predictive subset of markers, as opposed to all the SNPs on the chip. The best way to integrate genomic information into genetic improvement programs is to have it included in traditional genetic evaluations. This approach combines traditional expected progeny differences based on phenotype and pedigree with the genomic breeding values based on the markers. Including the different sources of information into a multiple trait genetic evaluation model, for within breed dairy cattle selection, is working with excellent results. However, given the wide genetic diversity of zebu breeds, the high-density panel used for genomic selection in dairy cattle (Ilumina Bovine SNP50 array) appears insufficient for across-breed genomic predictions and selection in beef cattle. Today there is only one breed-specific targeted SNP panel and genomic predictions developed using animals across the entire population of the Nellore breed (www.pfizersaudeanimal.com), which enables genomically - enhanced selection. Genomic profiles are a way to enhance our current selection tools to achieve more accurate predictions for younger animals. Material and Methods: We analyzed the age at first calving (AFC), accumulated productivity (ACP), stayability (STAY) and heifer pregnancy at 30 months (HP30) in Nellore cattle fitting two different animal models; 1) a traditional single trait model, and 2) a two-trait model where the genomic breeding value or molecular value prediction (MVP) was included as a correlated trait. All mixed model analyses were performed using the statistical software ASREML 3.0. Results: Genetic correlation estimates between AFC, ACP, STAY, HP30 and respective MVPs ranged from 0.29 to 0.46. Results also showed an increase of 56%, 36%, 62% and 19% in estimated accuracy of AFC, ACP, STAY and HP30 when MVP information was included in the animal model. Conclusion: Depending upon the trait, integration of MVP information into genetic evaluation resulted in increased accuracy of 19% to 62% as compared to accuracy from traditional genetic evaluation. GE-EPD will be an effective tool to enable faster genetic improvement through more dependable selection of young animals. MenosBackground: The sequencing and publication of the cattle genome and the identification of single nucleotide polymorphism (SNP) molecular markers have provided new tools for animal genetic evaluation and genomic-enhanced selection. These new tools aim to increase the accuracy and scope of selection while decreasing generation interval. The objective of this study was to evaluate the enhancement of accuracy caused by the use of genomic information (Clarifide® - Pfizer) on genetic evaluation of Brazilian Nellore cattle. Review: The application of genome-wide association studies (GWAS) is recognized as one of the most practical approaches to modern genetic improvement. Genomic selection is perhaps most suited to the improvement of traits with low heritability in zebu cattle. The primary interest in livestock genomics has been to estimate the effects of all the markers on the chip, conduct cross-validation to determine accuracy, and apply the resulting information in GWAS either alone [9] or in combination with bull test and pedigree-based genetic evaluation data. The cost of SNP50K genotyping however limits the commercial application of GWAS based on all the SNPs on the chip. However, reasonable predictability and accuracy can be achieved in GWAS by using an assay that contains an optimally selected predictive subset of markers, as opposed to all the SNPs on the chip. The best way to integrate genomic information into genetic improvement programs is to have it included in tradit... Mostrar Tudo |
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Palavras-Chave: |
DNA Markers; Genetic Evaluation; Genomic Enhanced EPDs; Genomic Selection; Nellore Cattle; SNP. |
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Categoria do assunto: |
L Ciência Animal e Produtos de Origem Animal |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/155805/1/Cnpgl-2016-ActaSciVet-Implementation.pdf
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Marc: |
LEADER 04311naa a2200277 a 4500
001 2064370
005 2023-01-30
008 2011 bl uuuu u00u1 u #d
100 1 $aLÔBO, R. B.
245 $aImplementation of DNA markers to produce genomically - enhanced EPDs in Nellore cattle.$h[electronic resource]
260 $c2011
520 $aBackground: The sequencing and publication of the cattle genome and the identification of single nucleotide polymorphism (SNP) molecular markers have provided new tools for animal genetic evaluation and genomic-enhanced selection. These new tools aim to increase the accuracy and scope of selection while decreasing generation interval. The objective of this study was to evaluate the enhancement of accuracy caused by the use of genomic information (Clarifide® - Pfizer) on genetic evaluation of Brazilian Nellore cattle. Review: The application of genome-wide association studies (GWAS) is recognized as one of the most practical approaches to modern genetic improvement. Genomic selection is perhaps most suited to the improvement of traits with low heritability in zebu cattle. The primary interest in livestock genomics has been to estimate the effects of all the markers on the chip, conduct cross-validation to determine accuracy, and apply the resulting information in GWAS either alone [9] or in combination with bull test and pedigree-based genetic evaluation data. The cost of SNP50K genotyping however limits the commercial application of GWAS based on all the SNPs on the chip. However, reasonable predictability and accuracy can be achieved in GWAS by using an assay that contains an optimally selected predictive subset of markers, as opposed to all the SNPs on the chip. The best way to integrate genomic information into genetic improvement programs is to have it included in traditional genetic evaluations. This approach combines traditional expected progeny differences based on phenotype and pedigree with the genomic breeding values based on the markers. Including the different sources of information into a multiple trait genetic evaluation model, for within breed dairy cattle selection, is working with excellent results. However, given the wide genetic diversity of zebu breeds, the high-density panel used for genomic selection in dairy cattle (Ilumina Bovine SNP50 array) appears insufficient for across-breed genomic predictions and selection in beef cattle. Today there is only one breed-specific targeted SNP panel and genomic predictions developed using animals across the entire population of the Nellore breed (www.pfizersaudeanimal.com), which enables genomically - enhanced selection. Genomic profiles are a way to enhance our current selection tools to achieve more accurate predictions for younger animals. Material and Methods: We analyzed the age at first calving (AFC), accumulated productivity (ACP), stayability (STAY) and heifer pregnancy at 30 months (HP30) in Nellore cattle fitting two different animal models; 1) a traditional single trait model, and 2) a two-trait model where the genomic breeding value or molecular value prediction (MVP) was included as a correlated trait. All mixed model analyses were performed using the statistical software ASREML 3.0. Results: Genetic correlation estimates between AFC, ACP, STAY, HP30 and respective MVPs ranged from 0.29 to 0.46. Results also showed an increase of 56%, 36%, 62% and 19% in estimated accuracy of AFC, ACP, STAY and HP30 when MVP information was included in the animal model. Conclusion: Depending upon the trait, integration of MVP information into genetic evaluation resulted in increased accuracy of 19% to 62% as compared to accuracy from traditional genetic evaluation. GE-EPD will be an effective tool to enable faster genetic improvement through more dependable selection of young animals.
653 $aDNA Markers
653 $aGenetic Evaluation
653 $aGenomic Enhanced EPDs
653 $aGenomic Selection
653 $aNellore Cattle
653 $aSNP
700 1 $aNKRUMAH, D.
700 1 $aGROSSI, D. do A.
700 1 $aBARROS, P. S. de
700 1 $aPAIVA, P.
700 1 $aBEZERRA, L. A. F.
700 1 $aOLIVEIRA, H. N. de
700 1 $aSILVA, M. V. G. B.
773 $tActa Scientiae Veterinariae$gv. 39, suppl. 1, p. s23-s27, 2011.
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