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Registro Completo |
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Biblioteca(s): |
Embrapa Agrobiologia; Embrapa Agropecuária Oeste; Embrapa Amapá; Embrapa Amazônia Oriental; Embrapa Cerrados; Embrapa Florestas; Embrapa Mandioca e Fruticultura; Embrapa Meio Ambiente; Embrapa Meio Norte / UEP-Parnaíba; Embrapa Meio-Norte; Embrapa Semiárido; Embrapa Solos; Embrapa Solos / UEP-Recife; Embrapa Trigo; Embrapa Unidades Centrais. MenosEmbrapa Agrobiologia; Embrapa Agropecuária Oeste; Embrapa Amapá; Embrapa Amazônia Oriental; Embrapa Cerrados; Embrapa Florestas; Embrapa Mandioca e Fruticultura; Embrapa Meio Ambiente; Embrapa Meio Norte / UEP-Parnaíba; Embrapa Meio-Norte... Mostrar Todas |
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Data corrente: |
01/10/1992 |
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Data da última atualização: |
02/04/2020 |
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Autoria: |
DURIEZ, M. A. de M.; JOHAS, R. A. L.; BARRETO, W. de O. |
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Título: |
Método simplificado para determinação dos valores Ki e Kr na terra fina. |
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Ano de publicação: |
1982 |
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Fonte/Imprenta: |
Rio de Janeiro: EMBRAPA-SNLCS, 1982. |
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Páginas: |
10 p. |
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Série: |
(EMBRAPA-SNLCS. Boletim de pesquisa, 2). |
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ISSN: |
0101-6253 |
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Idioma: |
Espanhol
Português |
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Conteúdo: |
As relacoes Ki e Kr do solo foram determinadas na terra fina seca ao ar em 70 amostras selecionadas, abrangendo varias classes de solos do Brasil, objetivando simplificar a metodologia adotada no Servico Nacional de Levantamento e Conservacao de Solos (SNLCS) para obtencao destes valores. Determinou-se o valor das relacoes Ki e Kr na fracao argila (< 2 u) em 23 amostras de solo, onde procedeu-se tambem a analise de difratometria de raios-x. Por meio da analise estatistica verificou-se ser significativa a correlacao existente entre os dois metodos quimicos empregados, ou seja, o Metodo 1 simplificado e o Metodo 2 segundo Vettori (1969). Concluiu-se pelo uso das simplificacoes aqui sugeridas, visando nao somente dinamizar a producao do laboratorio, como reduziro custo operacional do processo. |
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Palavras-Chave: |
Determinação de valores; Determinação dos valores ki e kr; KI; KR; kr na terra fina; Metodo de determinacao; Metodologia simplificada; Metodologia simplificada para valores ki e kr; Química analítica; Relação ki; Silica alumina; Silica sesquioxida; Solos; Terra fina; Valor Ki; Valor Kr. |
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Thesagro: |
Adubo; Análise Química; Método; Mineralogia; Química; Química do Solo; Solo. |
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Thesaurus Nal: |
analytical methods; soil; soil chemistry. |
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Categoria do assunto: |
--
P Recursos Naturais, Ciências Ambientais e da Terra |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/212134/1/SNLCS-BP-2-1982.pdf
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Marc: |
LEADER 02103nam a2200481 a 4500
001 1336026
005 2020-04-02
008 1982 bl uuuu u0uu1 u #d
022 $a0101-6253
100 1 $aDURIEZ, M. A. de M.
245 $aMétodo simplificado para determinação dos valores Ki e Kr na terra fina.
260 $aRio de Janeiro: EMBRAPA-SNLCS$c1982
300 $a10 p.
490 $a(EMBRAPA-SNLCS. Boletim de pesquisa, 2).
520 $aAs relacoes Ki e Kr do solo foram determinadas na terra fina seca ao ar em 70 amostras selecionadas, abrangendo varias classes de solos do Brasil, objetivando simplificar a metodologia adotada no Servico Nacional de Levantamento e Conservacao de Solos (SNLCS) para obtencao destes valores. Determinou-se o valor das relacoes Ki e Kr na fracao argila (< 2 u) em 23 amostras de solo, onde procedeu-se tambem a analise de difratometria de raios-x. Por meio da analise estatistica verificou-se ser significativa a correlacao existente entre os dois metodos quimicos empregados, ou seja, o Metodo 1 simplificado e o Metodo 2 segundo Vettori (1969). Concluiu-se pelo uso das simplificacoes aqui sugeridas, visando nao somente dinamizar a producao do laboratorio, como reduziro custo operacional do processo.
650 $aanalytical methods
650 $asoil
650 $asoil chemistry
650 $aAdubo
650 $aAnálise Química
650 $aMétodo
650 $aMineralogia
650 $aQuímica
650 $aQuímica do Solo
650 $aSolo
653 $aDeterminação de valores
653 $aDeterminação dos valores ki e kr
653 $aKI
653 $aKR
653 $akr na terra fina
653 $aMetodo de determinacao
653 $aMetodologia simplificada
653 $aMetodologia simplificada para valores ki e kr
653 $aQuímica analítica
653 $aRelação ki
653 $aSilica alumina
653 $aSilica sesquioxida
653 $aSolos
653 $aTerra fina
653 $aValor Ki
653 $aValor Kr
700 1 $aJOHAS, R. A. L.
700 1 $aBARRETO, W. de O.
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Registro original: |
Embrapa Solos (CNPS) |
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Registro Completo
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Biblioteca(s): |
Embrapa Meio Ambiente. |
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Data corrente: |
14/02/2023 |
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Data da última atualização: |
26/04/2023 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Circulação/Nível: |
A - 1 |
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Autoria: |
ROGÉRIO, F.; BARONCELLI, R.; CUEVAS-FERNÁNDEZ, F. B.; BECERRA, S.; CROUCH, J.; BETTIOL, W.; AZCÁRATE-PERIL, M. A.; MALAPI-WIGHT, M.; ORTEGA, V.; BETRAN, J.; TENUTA, A.; DAMBOLENA, J. S.; ESKER, P. D.; REVILLA, P.; JACKSON-ZIEMS; HILTBRUNNER, J.; MUNKVOLD, G.; BUHINICEK, I.; VICENTE-VILLARDÓN, J. L.''''; SUKNO, S. A.; THON, M. R. |
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Afiliação: |
FLÁVIA ROGÉRIO, UNIVERSIDAD DE SALAMANCA; RICCARDO BARONCELLI, UNIVERSITÀ DI BOLOGNA; FRANCISCO BORJA CUEVAS-FERNÁNDEZ, UNIVERSIDAD DE SALAMANCA; SIOLY BECERRA, UNIVERSIDAD DE SALAMANCA; JOANNE CROUCH, UNITED STATES DEPARTMENT OF AGRICULTURE; WAGNER BETTIOL, CNPMA; MARIA ANDREA AZCÁRATE-PERIL, UNIVERSITY OF NORTH CAROLINE; MARTHA MALAPI-WIGHT, UNITED STATES DEPARTMENT OF AGRICULTURE; VERONIQUE ORTEGA, SYNGENTA SEEDS; JAVIER BETRAN, BAYER CROP SCIENCE; ALBERT TENUTA, UNIVERSITY OF GUELPH-RIDGETOWN; JOSÉ S DAMBOLENA, UNIVERSIDAD NACIONAL DE CÓRDOBA; PAUL D ESKER, THE PENNSYLVANIA STATE UNIVERSITY; PEDRO REVILLA, CONSEJO SUPERIOR DE INVESTIGACIONES CIENTÍFICAS; TAMRA A JACKSON-ZIEMS, UNIVERSITY OF NEBRASKA-LINCOLN; JÜRG HILTBRUNNER, DÉPARTEMENT FÉDÉRAL DE L'ÉCONOMIE, DE LA FORMATION ET DE LA RECHERCHE; GARY MUNKVOLD, IOWA STATE UNIVERSITY; IVICA BUHINICEK, BC INSTITUTE FOR BREEDING AND PRODUCTION OF FIELD CROPS; JOSÉ LUIS VICENTE-VILLARDÓN, UNIVERSIDAD DE SALAMANCA; SERENELLA A SUKNO, UNIVERSIDAD DE SALAMANCA; MICHAEL R THON, UNIVERSIDAD DE SALAMANCA. |
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Título: |
Population genomics provide insights into the global genetic structure of Colletotrichum graminicola, the causal agent of maize anthracnose. |
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Ano de publicação: |
2022 |
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Fonte/Imprenta: |
MBio, v. 14, n. 1, e0287822, 2022. |
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ISSN: |
2150-7511 |
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DOI: |
https://doi.org/10.1128/mbio.02878-22 |
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Idioma: |
Inglês |
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Conteúdo: |
Abstract: Understanding the genetic diversity and mechanisms underlying genetic variation in pathogen populations is crucial to the development of effective control strategies. We investigated the genetic diversity and reproductive biology of Colletotrichum graminicola isolates which infect maize by sequencing the genomes of 108 isolates collected from 14 countries using restriction site-associated DNA sequencing (RAD-seq) and whole-genome sequencing (WGS). Clustering analyses based on single-nucleotide polymorphisms revealed three genetic groups delimited by continental origin, compatible with short-dispersal of the pathogen and geographic subdivision. Intra- and intercontinental migration was observed between Europe and South America, likely associated with the movement of contaminated germplasm. Low clonality, evidence of genetic recombination, and high phenotypic diversity were detected. We show evidence that, although it is rare (possibly due to losses of sexual reproduction- and meiosis-associated genes) C. graminicola can undergo sexual recombination. Our results support the hypotheses that intra- and intercontinental pathogen migration and genetic recombination have great impacts on the C. graminicola population structure. Importance: Plant pathogens cause significant reductions in yield and crop quality and cause enormous economic losses worldwide. Reducing these losses provides an obvious strategy to increase food production without further degrading natural ecosystems; however, this requires knowledge of the biology and evolution of the pathogens in agroecosystems. We employed a population genomics approach to investigate the genetic diversity and reproductive biology of the maize anthracnose pathogen (Colletotrichum graminicola) in 14 countries. We found that the populations are correlated with their geographical origin and that migration between countries is ongoing, possibly caused by the movement of infected plant material. This result has direct implications for disease management because migration can cause the movement of more virulent and/or fungicide-resistant genotypes. We conclude that genetic recombination is frequent (in contrast to the traditional view of C. graminicola being mainly asexual), which strongly impacts control measures and breeding programs aimed at controlling this disease. MenosAbstract: Understanding the genetic diversity and mechanisms underlying genetic variation in pathogen populations is crucial to the development of effective control strategies. We investigated the genetic diversity and reproductive biology of Colletotrichum graminicola isolates which infect maize by sequencing the genomes of 108 isolates collected from 14 countries using restriction site-associated DNA sequencing (RAD-seq) and whole-genome sequencing (WGS). Clustering analyses based on single-nucleotide polymorphisms revealed three genetic groups delimited by continental origin, compatible with short-dispersal of the pathogen and geographic subdivision. Intra- and intercontinental migration was observed between Europe and South America, likely associated with the movement of contaminated germplasm. Low clonality, evidence of genetic recombination, and high phenotypic diversity were detected. We show evidence that, although it is rare (possibly due to losses of sexual reproduction- and meiosis-associated genes) C. graminicola can undergo sexual recombination. Our results support the hypotheses that intra- and intercontinental pathogen migration and genetic recombination have great impacts on the C. graminicola population structure. Importance: Plant pathogens cause significant reductions in yield and crop quality and cause enormous economic losses worldwide. Reducing these losses provides an obvious strategy to increase food production without further degrading natural ecosys... Mostrar Tudo |
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Thesagro: |
Antracnose; Colletotrichum Graminicola; Milho; Variação Genética. |
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Thesaurus NAL: |
Anthracnose; Corn; Fungal diseases of plants; Genetic recombination; Genomics; Phylogeography; Population genetics. |
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Categoria do assunto: |
H Saúde e Patologia |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/249422/1/Bettiol-Population-Genomics-2023.pdf
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Marc: |
LEADER 03830naa a2200517 a 4500
001 2151733
005 2023-04-26
008 2022 bl uuuu u00u1 u #d
022 $a2150-7511
024 7 $ahttps://doi.org/10.1128/mbio.02878-22$2DOI
100 1 $aROGÉRIO, F.
245 $aPopulation genomics provide insights into the global genetic structure of Colletotrichum graminicola, the causal agent of maize anthracnose.$h[electronic resource]
260 $c2022
520 $aAbstract: Understanding the genetic diversity and mechanisms underlying genetic variation in pathogen populations is crucial to the development of effective control strategies. We investigated the genetic diversity and reproductive biology of Colletotrichum graminicola isolates which infect maize by sequencing the genomes of 108 isolates collected from 14 countries using restriction site-associated DNA sequencing (RAD-seq) and whole-genome sequencing (WGS). Clustering analyses based on single-nucleotide polymorphisms revealed three genetic groups delimited by continental origin, compatible with short-dispersal of the pathogen and geographic subdivision. Intra- and intercontinental migration was observed between Europe and South America, likely associated with the movement of contaminated germplasm. Low clonality, evidence of genetic recombination, and high phenotypic diversity were detected. We show evidence that, although it is rare (possibly due to losses of sexual reproduction- and meiosis-associated genes) C. graminicola can undergo sexual recombination. Our results support the hypotheses that intra- and intercontinental pathogen migration and genetic recombination have great impacts on the C. graminicola population structure. Importance: Plant pathogens cause significant reductions in yield and crop quality and cause enormous economic losses worldwide. Reducing these losses provides an obvious strategy to increase food production without further degrading natural ecosystems; however, this requires knowledge of the biology and evolution of the pathogens in agroecosystems. We employed a population genomics approach to investigate the genetic diversity and reproductive biology of the maize anthracnose pathogen (Colletotrichum graminicola) in 14 countries. We found that the populations are correlated with their geographical origin and that migration between countries is ongoing, possibly caused by the movement of infected plant material. This result has direct implications for disease management because migration can cause the movement of more virulent and/or fungicide-resistant genotypes. We conclude that genetic recombination is frequent (in contrast to the traditional view of C. graminicola being mainly asexual), which strongly impacts control measures and breeding programs aimed at controlling this disease.
650 $aAnthracnose
650 $aCorn
650 $aFungal diseases of plants
650 $aGenetic recombination
650 $aGenomics
650 $aPhylogeography
650 $aPopulation genetics
650 $aAntracnose
650 $aColletotrichum Graminicola
650 $aMilho
650 $aVariação Genética
700 1 $aBARONCELLI, R.
700 1 $aCUEVAS-FERNÁNDEZ, F. B.
700 1 $aBECERRA, S.
700 1 $aCROUCH, J.
700 1 $aBETTIOL, W.
700 1 $aAZCÁRATE-PERIL, M. A.
700 1 $aMALAPI-WIGHT, M.
700 1 $aORTEGA, V.
700 1 $aBETRAN, J.
700 1 $aTENUTA, A.
700 1 $aDAMBOLENA, J. S.
700 1 $aESKER, P. D.
700 1 $aREVILLA, P.
700 1 $aJACKSON-ZIEMS
700 1 $aHILTBRUNNER, J.
700 1 $aMUNKVOLD, G.
700 1 $aBUHINICEK, I.
700 1 $aVICENTE-VILLARDÓN, J. L.''''
700 1 $aSUKNO, S. A.
700 1 $aTHON, M. R.
773 $tMBio$gv. 14, n. 1, e0287822, 2022.
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Embrapa Meio Ambiente (CNPMA) |
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