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Registro Completo |
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Biblioteca(s): |
Embrapa Algodão; Embrapa Recursos Genéticos e Biotecnologia. |
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Data corrente: |
12/04/2019 |
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Data da última atualização: |
20/01/2020 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
LOPES, C. M. L.; CARES, J. E.; PERINA, F. J.; NASCIMENTO, G. F.; MENDONÇA, J. S. F.; MOITA, A. W.; CASTAGNONE-SERENO, P.; CARNEIRO, R. M. D. G. |
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Afiliação: |
C. M. L. LOPES, UNB; J. E. CARES, UNB; FABIANO JOSE PERINA, CNPA; G. F. NASCIMENTO; J. S. F. MENDONÇA; ANTONIO WILLIAMS MOITA, CNPH; P. CASTAGNONE-SERENO, INRA, FRANCE; REGINA MARIA DECHECHI G CARNEIRO, Cenargen. |
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Título: |
Diversity of Meloidogyne incognita populations from cotton and aggressiveness to Gossypium spp. accessions. |
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Ano de publicação: |
2019 |
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Fonte/Imprenta: |
Plant Pathology, v. 68, p. 816-824, 2019. |
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DOI: |
10.1111/ppa.12991 |
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Idioma: |
Inglês |
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Conteúdo: |
The root-knot nematode (RKN) Meloidogyne incognita is the main nematode causing losses to the cotton crop in Brazil. In order to implement control strategies within integrated management, an accurate identification of the nematode populations prevailing in the cotton production areas is necessary. This study aimed to assess the genetic variability and aggressiveness of RKN populations from cotton production areas in Bahia state, Brazil. All populations were characterized biochemically and molecularly and identified as M. incognita. RAPD and AFLP markers detected 44% of polymorphic fragments among the 13 populations of this species. The 10 M. incognita populations collected in Bahia presented 33.7% of diversity when compared to each other, and 25% when the population from Barreiras (the most polymorphic) was excluded. This polymorphism increased when populations from other Brazilian states were included. The aggressiveness and virulence among populations from Bahia towards different cotton accessions (susceptible/resistant) was also studied. None of the populations showed virulence against the moderately resistant (Clevewilt 6, Wild Mexican Jack Jones and LA 887) and highly resistant (CIR1348 and M-315 RNR) cultivars. Two M. incognita populations from Barreiras were the most aggressive, reaching reproduction factors of 539 and 218, respectively, in the susceptible cultivar FiberMax 966. The most aggressive population (8) was also the most genetically divergent in phylogenetic analyses. These results demonstrate that diversity of M. incognita populations from cotton farms in Bahia is not related to virulence against resistant accessions, which suggests that cultivars containing one or two resistance genes with good agronomic characteristics could be used in infested commercial areas in Bahia state, Brazil. MenosThe root-knot nematode (RKN) Meloidogyne incognita is the main nematode causing losses to the cotton crop in Brazil. In order to implement control strategies within integrated management, an accurate identification of the nematode populations prevailing in the cotton production areas is necessary. This study aimed to assess the genetic variability and aggressiveness of RKN populations from cotton production areas in Bahia state, Brazil. All populations were characterized biochemically and molecularly and identified as M. incognita. RAPD and AFLP markers detected 44% of polymorphic fragments among the 13 populations of this species. The 10 M. incognita populations collected in Bahia presented 33.7% of diversity when compared to each other, and 25% when the population from Barreiras (the most polymorphic) was excluded. This polymorphism increased when populations from other Brazilian states were included. The aggressiveness and virulence among populations from Bahia towards different cotton accessions (susceptible/resistant) was also studied. None of the populations showed virulence against the moderately resistant (Clevewilt 6, Wild Mexican Jack Jones and LA 887) and highly resistant (CIR1348 and M-315 RNR) cultivars. Two M. incognita populations from Barreiras were the most aggressive, reaching reproduction factors of 539 and 218, respectively, in the susceptible cultivar FiberMax 966. The most aggressive population (8) was also the most genetically divergent in phylogenetic... Mostrar Tudo |
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Palavras-Chave: |
AFLP; RAPD; Resistance; RKN management. |
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Thesagro: |
Gossypium spp. |
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Thesaurus Nal: |
Pathogenicity. |
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Categoria do assunto: |
-- |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/208667/1/Diversity-of-meloidogyne-incognita.pdf
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Marc: |
LEADER 02665naa a2200289 a 4500
001 2118660
005 2020-01-20
008 2019 bl uuuu u00u1 u #d
024 7 $a10.1111/ppa.12991$2DOI
100 1 $aLOPES, C. M. L.
245 $aDiversity of Meloidogyne incognita populations from cotton and aggressiveness to Gossypium spp. accessions.$h[electronic resource]
260 $c2019
520 $aThe root-knot nematode (RKN) Meloidogyne incognita is the main nematode causing losses to the cotton crop in Brazil. In order to implement control strategies within integrated management, an accurate identification of the nematode populations prevailing in the cotton production areas is necessary. This study aimed to assess the genetic variability and aggressiveness of RKN populations from cotton production areas in Bahia state, Brazil. All populations were characterized biochemically and molecularly and identified as M. incognita. RAPD and AFLP markers detected 44% of polymorphic fragments among the 13 populations of this species. The 10 M. incognita populations collected in Bahia presented 33.7% of diversity when compared to each other, and 25% when the population from Barreiras (the most polymorphic) was excluded. This polymorphism increased when populations from other Brazilian states were included. The aggressiveness and virulence among populations from Bahia towards different cotton accessions (susceptible/resistant) was also studied. None of the populations showed virulence against the moderately resistant (Clevewilt 6, Wild Mexican Jack Jones and LA 887) and highly resistant (CIR1348 and M-315 RNR) cultivars. Two M. incognita populations from Barreiras were the most aggressive, reaching reproduction factors of 539 and 218, respectively, in the susceptible cultivar FiberMax 966. The most aggressive population (8) was also the most genetically divergent in phylogenetic analyses. These results demonstrate that diversity of M. incognita populations from cotton farms in Bahia is not related to virulence against resistant accessions, which suggests that cultivars containing one or two resistance genes with good agronomic characteristics could be used in infested commercial areas in Bahia state, Brazil.
650 $aPathogenicity
650 $aGossypium spp
653 $aAFLP
653 $aRAPD
653 $aResistance
653 $aRKN management
700 1 $aCARES, J. E.
700 1 $aPERINA, F. J.
700 1 $aNASCIMENTO, G. F.
700 1 $aMENDONÇA, J. S. F.
700 1 $aMOITA, A. W.
700 1 $aCASTAGNONE-SERENO, P.
700 1 $aCARNEIRO, R. M. D. G.
773 $tPlant Pathology$gv. 68, p. 816-824, 2019.
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Registro original: |
Embrapa Algodão (CNPA) |
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Biblioteca |
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Tipo/Formato |
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 | Acesso ao texto completo restrito à biblioteca da Embrapa Amazônia Ocidental. Para informações adicionais entre em contato com cpaa.biblioteca@embrapa.br. |
Registro Completo
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Biblioteca(s): |
Embrapa Amapá; Embrapa Amazônia Ocidental; Embrapa Amazônia Oriental; Embrapa Rondônia; Embrapa Roraima. |
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Data corrente: |
27/06/2019 |
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Data da última atualização: |
11/11/2019 |
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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: |
SILVA JÚNIOR, E. C. da; MARTINS, G. C.; WADT, L. H. de O.; SILVA, K. E. da; LIMA, R. M. B. de; BATISTA, K. D.; GUEDES, M. C.; OLIVEIRA JUNIOR, R. C. de; REIS, A. R.; LOPES, G.; MENEZES, M. D. de; BROADLEY, M. R.; YOUNG, S. D.; GUILHERME, L. R. G. |
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Afiliação: |
LUCIA HELENA DE OLIVEIRA WADT, CPAF-RO; KATIA EMIDIO DA SILVA, CPAA; ROBERVAL MONTEIRO BEZERRA DE LIMA, CPAA; KARINE DIAS BATISTA, CPAF-RR; MARCELINO CARNEIRO GUEDES, CPAF-AP; RAIMUNDO COSME DE OLIVEIRA JUNIOR, CPATU. |
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Título: |
Natural variation of arsenic fractions in soils of the Brazilian Amazon. |
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Ano de publicação: |
2019 |
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Fonte/Imprenta: |
Science of the Total Environment,v. 687, p. 1219-1231, 2019. |
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Idioma: |
Inglês
Português |
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Conteúdo: |
Arsenic (As) in native soils of the Amazon rainforest is a concern due to its likely origin from the Andean rivers, which transport loads of sediments containing substantial amounts of trace elements coming from the cordilleras. Yet, unveiling soil As baseline concentrations in the Amazon basin is still a need because most studies in Brazil have been performed in areas with predominantly high concentrations and cannot express a real baseline value for the region. In this study, 414 soil samples (0?20, 20?40 and 40?60 cm layers) were collected from different sites throughout the Amazon basin - including native Amazon rainforest and minimally disturbed areas - and used to determine total and extractable (soluble + available) As concentrations along with relevant soil physicochemical properties. Descriptive statistics of the data was performed and Pearson correlation supported by a Principal Component Analysis (PCA) provided an improved understanding ofwhere and howAs concentrations are influenced by soil attributes. Total As concentration ranged from0.98 to 41.71 mgkg?1 with values usually increasing from the topsoil (0?20 cm) to the deepest layer (40?60 cm) in all sites studied. Considering the proportional contribution given by each fraction (soluble and available) on extractable As concentration, it is noticeable that KH2PO4-extractable As represents themost important fraction,with N70% of the As extracted on average in all the sites studied. Still, the extractable fractions (soluble+available) correspond to ~0.24% of the total As, on average. Total, available, and soluble As fractions were strongly and positively correlated with soil Al3+.
The PCA indicated that soil pH in combination with CEC might be the key factors controlling soil As concentrations and the occurrence of each arsenic fraction in the soil layers. MenosArsenic (As) in native soils of the Amazon rainforest is a concern due to its likely origin from the Andean rivers, which transport loads of sediments containing substantial amounts of trace elements coming from the cordilleras. Yet, unveiling soil As baseline concentrations in the Amazon basin is still a need because most studies in Brazil have been performed in areas with predominantly high concentrations and cannot express a real baseline value for the region. In this study, 414 soil samples (0?20, 20?40 and 40?60 cm layers) were collected from different sites throughout the Amazon basin - including native Amazon rainforest and minimally disturbed areas - and used to determine total and extractable (soluble + available) As concentrations along with relevant soil physicochemical properties. Descriptive statistics of the data was performed and Pearson correlation supported by a Principal Component Analysis (PCA) provided an improved understanding ofwhere and howAs concentrations are influenced by soil attributes. Total As concentration ranged from0.98 to 41.71 mgkg?1 with values usually increasing from the topsoil (0?20 cm) to the deepest layer (40?60 cm) in all sites studied. Considering the proportional contribution given by each fraction (soluble and available) on extractable As concentration, it is noticeable that KH2PO4-extractable As represents themost important fraction,with N70% of the As extracted on average in all the sites studied. Still, the extractable fraction... Mostrar Tudo |
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Palavras-Chave: |
Carcinogenic. |
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Thesagro: |
Arsênico. |
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Thesaurus NAL: |
Amazonia; Arsenic. |
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Categoria do assunto: |
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K Ciência Florestal e Produtos de Origem Vegetal |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/198874/1/arsenio-ediu-2019.pdf
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Marc: |
LEADER 02760naa a2200325 a 4500
001 2110118
005 2019-11-11
008 2019 bl uuuu u00u1 u #d
100 1 $aSILVA JÚNIOR, E. C. da
245 $aNatural variation of arsenic fractions in soils of the Brazilian Amazon.$h[electronic resource]
260 $c2019
520 $aArsenic (As) in native soils of the Amazon rainforest is a concern due to its likely origin from the Andean rivers, which transport loads of sediments containing substantial amounts of trace elements coming from the cordilleras. Yet, unveiling soil As baseline concentrations in the Amazon basin is still a need because most studies in Brazil have been performed in areas with predominantly high concentrations and cannot express a real baseline value for the region. In this study, 414 soil samples (0?20, 20?40 and 40?60 cm layers) were collected from different sites throughout the Amazon basin - including native Amazon rainforest and minimally disturbed areas - and used to determine total and extractable (soluble + available) As concentrations along with relevant soil physicochemical properties. Descriptive statistics of the data was performed and Pearson correlation supported by a Principal Component Analysis (PCA) provided an improved understanding ofwhere and howAs concentrations are influenced by soil attributes. Total As concentration ranged from0.98 to 41.71 mgkg?1 with values usually increasing from the topsoil (0?20 cm) to the deepest layer (40?60 cm) in all sites studied. Considering the proportional contribution given by each fraction (soluble and available) on extractable As concentration, it is noticeable that KH2PO4-extractable As represents themost important fraction,with N70% of the As extracted on average in all the sites studied. Still, the extractable fractions (soluble+available) correspond to ~0.24% of the total As, on average. Total, available, and soluble As fractions were strongly and positively correlated with soil Al3+. The PCA indicated that soil pH in combination with CEC might be the key factors controlling soil As concentrations and the occurrence of each arsenic fraction in the soil layers.
650 $aAmazonia
650 $aArsenic
650 $aArsênico
653 $aCarcinogenic
700 1 $aMARTINS, G. C.
700 1 $aWADT, L. H. de O.
700 1 $aSILVA, K. E. da
700 1 $aLIMA, R. M. B. de
700 1 $aBATISTA, K. D.
700 1 $aGUEDES, M. C.
700 1 $aOLIVEIRA JUNIOR, R. C. de
700 1 $aREIS, A. R.
700 1 $aLOPES, G.
700 1 $aMENEZES, M. D. de
700 1 $aBROADLEY, M. R.
700 1 $aYOUNG, S. D.
700 1 $aGUILHERME, L. R. G.
773 $tScience of the Total Environment,v. 687, p. 1219-1231, 2019.
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Embrapa Rondônia (CPAF-RO) |
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