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Registro Completo |
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Biblioteca(s): |
Embrapa Milho e Sorgo. |
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Data corrente: |
23/04/1996 |
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Data da última atualização: |
11/12/2021 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
AGUIAR, P. A. de; RAMALHO, M. A. P.; MAGNAVACA, R.; ANDRADE, M. A. de. |
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Afiliação: |
EMBRAPA-CNPMS. |
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Título: |
Avaliação de progênies de meios irmãos da população de milho CMS-39 em diferentes condições de ambiente. |
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Ano de publicação: |
1989 |
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Fonte/Imprenta: |
Pesquisa Agropecuária Brasileira, Brasília, v. 24, n. 6, p. 727-732, 1989. |
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Idioma: |
Português |
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Conteúdo: |
Quatrocentas progenies de meios-irmaos, provenientes da populacao de milho CMS-39, foram avaliadas em tres localidades do estado de Minas Gerais, Lavras, Ijaci e Sete Lagoas, durante o ano agricola 84/85, com o intuito de verificar o potencial desta populacao para o melhoramento e tambem verificar a existencia da interacao progenies x ambientes. A populacao de milho CMS-39 foi obtida pelo Centro Nacional de Pesquisa de Milho e Sorgo, em Sete Lagoas, e foi sintetizada por recombinacao a partir de 55 cultivares. O delineamento utilizado foi um latice 20 x 20 com duas repeticoes, e cada parcela foi constituida por uma linha de 5m. As estimativas dos parametros fenotipicos e geneticos obtidos para o peso das espigas despalhadas mostraram que a populacao apresenta ampla variabilidade genetica. Constatou-se tambem, que a estimativa da variancia da interacao progenies x ambientes foi relativamente alta, o que mostra a necessidade de as progenies serem avaliadas em mais de um ambiente. A estimativa do ganho esperado com a selecao entre as familias, considerando a media das progenies nos tres locais, foi de 10,28%. O desdobramento da interacao progenies x locais mostrou que ela e devida, em grande parte, a falta de correlacao entre o desempenho das progenies nos varios locais. |
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Palavras-Chave: |
Ambiente; CMS 39; Half sib; Ijaci; Interacao; Interaction; Lavras; Maize; Meios irmaos; Minas Gerais; Progenies; Sete Lagoas. |
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Thesagro: |
Genótipo; Melhoramento; População; Zea Mays. |
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Thesaurus Nal: |
breeding; environment; genotype; population. |
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Categoria do assunto: |
G Melhoramento Genético |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/47213/1/Avaliacao-progenies-1.pdf
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Marc: |
LEADER 02343naa a2200397 a 4500
001 1471635
005 2021-12-11
008 1989 bl uuuu u00u1 u #d
100 1 $aAGUIAR, P. A. de
245 $aAvaliação de progênies de meios irmãos da população de milho CMS-39 em diferentes condições de ambiente.$h[electronic resource]
260 $c1989
520 $aQuatrocentas progenies de meios-irmaos, provenientes da populacao de milho CMS-39, foram avaliadas em tres localidades do estado de Minas Gerais, Lavras, Ijaci e Sete Lagoas, durante o ano agricola 84/85, com o intuito de verificar o potencial desta populacao para o melhoramento e tambem verificar a existencia da interacao progenies x ambientes. A populacao de milho CMS-39 foi obtida pelo Centro Nacional de Pesquisa de Milho e Sorgo, em Sete Lagoas, e foi sintetizada por recombinacao a partir de 55 cultivares. O delineamento utilizado foi um latice 20 x 20 com duas repeticoes, e cada parcela foi constituida por uma linha de 5m. As estimativas dos parametros fenotipicos e geneticos obtidos para o peso das espigas despalhadas mostraram que a populacao apresenta ampla variabilidade genetica. Constatou-se tambem, que a estimativa da variancia da interacao progenies x ambientes foi relativamente alta, o que mostra a necessidade de as progenies serem avaliadas em mais de um ambiente. A estimativa do ganho esperado com a selecao entre as familias, considerando a media das progenies nos tres locais, foi de 10,28%. O desdobramento da interacao progenies x locais mostrou que ela e devida, em grande parte, a falta de correlacao entre o desempenho das progenies nos varios locais.
650 $abreeding
650 $aenvironment
650 $agenotype
650 $apopulation
650 $aGenótipo
650 $aMelhoramento
650 $aPopulação
650 $aZea Mays
653 $aAmbiente
653 $aCMS 39
653 $aHalf sib
653 $aIjaci
653 $aInteracao
653 $aInteraction
653 $aLavras
653 $aMaize
653 $aMeios irmaos
653 $aMinas Gerais
653 $aProgenies
653 $aSete Lagoas
700 1 $aRAMALHO, M. A. P.
700 1 $aMAGNAVACA, R.
700 1 $aANDRADE, M. A. de
773 $tPesquisa Agropecuária Brasileira, Brasília$gv. 24, n. 6, p. 727-732, 1989.
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Registro original: |
Embrapa Milho e Sorgo (CNPMS) |
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Registro Completo
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Biblioteca(s): |
Embrapa Territorial. |
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Data corrente: |
13/03/2008 |
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Data da última atualização: |
22/08/2014 |
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Tipo da produção científica: |
Resumo em Anais de Congresso |
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Autoria: |
FERREIRA, J.; BATISTELLA, M. |
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Afiliação: |
Joice Ferreira (Embrapa Amazônia Oriental); Mateus Batistella (Embrapa Monitoramento por Satélite). |
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Título: |
Carbon sequestration by secondary forests at small farms along the Transamazon highway. |
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Ano de publicação: |
2007 |
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Fonte/Imprenta: |
In: CONFERÊNCIA REGIONAL SOBRE MUDANÇAS GLOBAIS: AMÉRICA DO SUL, 3., 2007. São Paulo. Resumos... São Paulo: IEA Instituto de Estudos Avançados da Universidade de São Paulo, 2007. |
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Páginas: |
1 p. |
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Idioma: |
Português |
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Conteúdo: |
Secondary tropical forest regrowth in abandoned agricultural areas is becoming a key element in the mitigation of global and regional climate change. In this study we focus on estimating the total aboveground biomass stored in secondary forests of distinct successional stages, following traditional cultivation by smallholders settled along the Transamazon highway, in Pará, Brazil. The study site is one of the several areas in the Amazon region assisted by the Brazilian government program called "Proambiente". Different actions have been developed by Proambiente wit the overall objective of conserving natural resources while enhancing sustainable production systems. In this study, ten small farms were investigated. Each area was georeferenced and land cover was classified based on Landsat TM images. Land use histories were obtained from interviews with the farmers. Eleven secondary forest patches with areas larger than 5ha were classified as initial or advanced stages, according to their structural attributes. A matere forest site was also studied for comparison. Three nested plots were established for each sampled area (i.e., squares of 10 x 10m, 3 x 3, and 1 x 1m). Aboveground biomass was estimated by a general model for the 573 stems measured in diameter and height. Altrough general models may present limitations, they can be useful as a first a approximation in the broad perspective of our study. Mean aboveground biomass was estimated as 45Mg ha-1 (SD=27) for forests in the initial successional stage and 100Mg ha-1 (SD=60) for forests in the advanced successional stage. Simulations for hypothetical farms with total area of 100ha showed a potential carbon sequestration varying from 937 tons of carbon (12.5% of the area with forests in the initial and 12.5% in the advanced stage) to 125 tons of carbon (5% of the area with successional forest in the initial stage). More than creating expectations towards a successful scenario of a global carbon market, these results can contribute to an assessment of environmental services provided by secondary forests in the Brazilian Amazon. MenosSecondary tropical forest regrowth in abandoned agricultural areas is becoming a key element in the mitigation of global and regional climate change. In this study we focus on estimating the total aboveground biomass stored in secondary forests of distinct successional stages, following traditional cultivation by smallholders settled along the Transamazon highway, in Pará, Brazil. The study site is one of the several areas in the Amazon region assisted by the Brazilian government program called "Proambiente". Different actions have been developed by Proambiente wit the overall objective of conserving natural resources while enhancing sustainable production systems. In this study, ten small farms were investigated. Each area was georeferenced and land cover was classified based on Landsat TM images. Land use histories were obtained from interviews with the farmers. Eleven secondary forest patches with areas larger than 5ha were classified as initial or advanced stages, according to their structural attributes. A matere forest site was also studied for comparison. Three nested plots were established for each sampled area (i.e., squares of 10 x 10m, 3 x 3, and 1 x 1m). Aboveground biomass was estimated by a general model for the 573 stems measured in diameter and height. Altrough general models may present limitations, they can be useful as a first a approximation in the broad perspective of our study. Mean aboveground biomass was estimated as 45Mg ha-1 (SD=27) for forests in t... Mostrar Tudo |
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Palavras-Chave: |
Abivegriund biomass; Brazilian Amamon; Carbon storage; Environmental Services. |
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Categoria do assunto: |
-- |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/107102/1/2060.pdf
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Marc: |
LEADER 02778nam a2200181 a 4500
001 1017639
005 2014-08-22
008 2007 bl uuuu u00u1 u #d
100 1 $aFERREIRA, J.
245 $aCarbon sequestration by secondary forests at small farms along the Transamazon highway.
260 $aIn: CONFERÊNCIA REGIONAL SOBRE MUDANÇAS GLOBAIS: AMÉRICA DO SUL, 3., 2007. São Paulo. Resumos... São Paulo: IEA Instituto de Estudos Avançados da Universidade de São Paulo$c2007
300 $a1 p.
520 $aSecondary tropical forest regrowth in abandoned agricultural areas is becoming a key element in the mitigation of global and regional climate change. In this study we focus on estimating the total aboveground biomass stored in secondary forests of distinct successional stages, following traditional cultivation by smallholders settled along the Transamazon highway, in Pará, Brazil. The study site is one of the several areas in the Amazon region assisted by the Brazilian government program called "Proambiente". Different actions have been developed by Proambiente wit the overall objective of conserving natural resources while enhancing sustainable production systems. In this study, ten small farms were investigated. Each area was georeferenced and land cover was classified based on Landsat TM images. Land use histories were obtained from interviews with the farmers. Eleven secondary forest patches with areas larger than 5ha were classified as initial or advanced stages, according to their structural attributes. A matere forest site was also studied for comparison. Three nested plots were established for each sampled area (i.e., squares of 10 x 10m, 3 x 3, and 1 x 1m). Aboveground biomass was estimated by a general model for the 573 stems measured in diameter and height. Altrough general models may present limitations, they can be useful as a first a approximation in the broad perspective of our study. Mean aboveground biomass was estimated as 45Mg ha-1 (SD=27) for forests in the initial successional stage and 100Mg ha-1 (SD=60) for forests in the advanced successional stage. Simulations for hypothetical farms with total area of 100ha showed a potential carbon sequestration varying from 937 tons of carbon (12.5% of the area with forests in the initial and 12.5% in the advanced stage) to 125 tons of carbon (5% of the area with successional forest in the initial stage). More than creating expectations towards a successful scenario of a global carbon market, these results can contribute to an assessment of environmental services provided by secondary forests in the Brazilian Amazon.
653 $aAbivegriund biomass
653 $aBrazilian Amamon
653 $aCarbon storage
653 $aEnvironmental Services
700 1 $aBATISTELLA, M.
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Embrapa Territorial (CNPM) |
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