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Registro Completo |
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Biblioteca(s): |
Embrapa Instrumentação. |
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Data corrente: |
10/04/2021 |
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Data da última atualização: |
01/02/2023 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
SANT'ANNA, I. C.; GOUVÊA, L. R. L.; MARTINS, M. A.; SCALOPPI JUNIOR, E. J.; FREITAS, R. S.; GONÇALVES, P. S. |
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Afiliação: |
MARIA ALICE MARTINS, CNPDIA. |
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Título: |
Genetic diversity associated with natural rubber quality in elite genotypes of the rubber tree. |
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Ano de publicação: |
2021 |
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Fonte/Imprenta: |
ScientifIc Reports, v. 11, ed. 1, 1081, 2021. |
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Páginas: |
1 - 10 |
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DOI: |
https://doi.org/10.1038/s41598-020-80110-w |
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Idioma: |
Inglês |
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Conteúdo: |
The objective of this study was to evaluate the genetic variability of natural rubber latex traits among 44 elite genotypes of the rubber tree [Hevea brasiliensis (Willd. ex Adr. de Juss.) Müell. Arg.]. Multivariate analysis and machine learning techniques were used, targeting the selection of parents that demonstrate superior characters. We analyzed traits related to technological or physicochemical properties of natural rubber latex, such as Wallace plasticity (P0), the plasticity retention index [PRI (%)], Mooney viscosity (VR), ash percentage (Ash), acetone extract percentage (AE), and nitrogen percentage (N), to study genetic diversity. Multivariate [unweighted pair group method with arithmetic means (UPGMA) and Tocher)] and machine learning techniques [K-means and Kohonen’s self-organizing maps (SOMs)] were employed. The genotypes showed high genetic variability for some of the evaluated traits. The traits PRI, Ash, and PO contributed the most to genetic diversity. The genotypes were classifed into six clusters by the UPGMA method, and the results were consistent with the Tocher, K-means and SOM results. PRI can be used to improve the industrial potential of clones. The clones IAC 418 and PB 326 were the most divergent, followed by IAC 404 and IAC 56. These genotypes and others from the IAC 500 and 400 series could be used to start a breeding program. These combinations ofer greater heterotic potential than the others, which can be used to improve components of rubber latex quality. Thus, it is important to consider the quality of rubber latex in the early stage of breeding programs MenosThe objective of this study was to evaluate the genetic variability of natural rubber latex traits among 44 elite genotypes of the rubber tree [Hevea brasiliensis (Willd. ex Adr. de Juss.) Müell. Arg.]. Multivariate analysis and machine learning techniques were used, targeting the selection of parents that demonstrate superior characters. We analyzed traits related to technological or physicochemical properties of natural rubber latex, such as Wallace plasticity (P0), the plasticity retention index [PRI (%)], Mooney viscosity (VR), ash percentage (Ash), acetone extract percentage (AE), and nitrogen percentage (N), to study genetic diversity. Multivariate [unweighted pair group method with arithmetic means (UPGMA) and Tocher)] and machine learning techniques [K-means and Kohonen’s self-organizing maps (SOMs)] were employed. The genotypes showed high genetic variability for some of the evaluated traits. The traits PRI, Ash, and PO contributed the most to genetic diversity. The genotypes were classifed into six clusters by the UPGMA method, and the results were consistent with the Tocher, K-means and SOM results. PRI can be used to improve the industrial potential of clones. The clones IAC 418 and PB 326 were the most divergent, followed by IAC 404 and IAC 56. These genotypes and others from the IAC 500 and 400 series could be used to start a breeding program. These combinations ofer greater heterotic potential than the others, which can be used to improve components of rubber ... Mostrar Tudo |
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Palavras-Chave: |
Amazon region; Rubber agricultural. |
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Categoria do assunto: |
-- |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/222465/1/P-Genetic-diversity-associated-....pdf
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Marc: |
LEADER 02330naa a2200229 a 4500
001 2131194
005 2023-02-01
008 2021 bl uuuu u00u1 u #d
024 7 $ahttps://doi.org/10.1038/s41598-020-80110-w$2DOI
100 1 $aSANT'ANNA, I. C.
245 $aGenetic diversity associated with natural rubber quality in elite genotypes of the rubber tree.$h[electronic resource]
260 $c2021
300 $a1 - 10
520 $aThe objective of this study was to evaluate the genetic variability of natural rubber latex traits among 44 elite genotypes of the rubber tree [Hevea brasiliensis (Willd. ex Adr. de Juss.) Müell. Arg.]. Multivariate analysis and machine learning techniques were used, targeting the selection of parents that demonstrate superior characters. We analyzed traits related to technological or physicochemical properties of natural rubber latex, such as Wallace plasticity (P0), the plasticity retention index [PRI (%)], Mooney viscosity (VR), ash percentage (Ash), acetone extract percentage (AE), and nitrogen percentage (N), to study genetic diversity. Multivariate [unweighted pair group method with arithmetic means (UPGMA) and Tocher)] and machine learning techniques [K-means and Kohonen’s self-organizing maps (SOMs)] were employed. The genotypes showed high genetic variability for some of the evaluated traits. The traits PRI, Ash, and PO contributed the most to genetic diversity. The genotypes were classifed into six clusters by the UPGMA method, and the results were consistent with the Tocher, K-means and SOM results. PRI can be used to improve the industrial potential of clones. The clones IAC 418 and PB 326 were the most divergent, followed by IAC 404 and IAC 56. These genotypes and others from the IAC 500 and 400 series could be used to start a breeding program. These combinations ofer greater heterotic potential than the others, which can be used to improve components of rubber latex quality. Thus, it is important to consider the quality of rubber latex in the early stage of breeding programs
653 $aAmazon region
653 $aRubber agricultural
700 1 $aGOUVÊA, L. R. L.
700 1 $aMARTINS, M. A.
700 1 $aSCALOPPI JUNIOR, E. J.
700 1 $aFREITAS, R. S.
700 1 $aGONÇALVES, P. S.
773 $tScientifIc Reports$gv. 11, ed. 1, 1081, 2021.
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Registro original: |
Embrapa Instrumentação (CNPDIA) |
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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 Amazônia Ocidental. |
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Data corrente: |
14/02/2006 |
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Data da última atualização: |
10/06/2020 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Circulação/Nível: |
Internacional - A |
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Autoria: |
JÄNSCH, S.; GARCIA, M.; RÖMBKE, J. |
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Afiliação: |
ECT Oekotoxikologie GmbH; Embrapa Amazônia Ocidental. |
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Título: |
Acute and chronic isopod testing using tropical Porcellionides pruinosus and three model pesticides. |
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Ano de publicação: |
2005 |
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Fonte/Imprenta: |
European Journal of Soil Biology, v. 41, n. 3-4, p. 143-152, jul./dez. 2005. |
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DOI: |
10.1016/j.ejsobi.2005.09.010 |
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Idioma: |
Inglês |
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Conteúdo: |
An approach for testing acute and chronic ecotoxicological effects of pesticides on isopods in the laboratory is presented. Laboratory cultures of tropical Porcellionides pruinosus were used. The pesticides Benomyl, Carbendazim and lambda-Cyhalothrin served as model chemicals. The toxicity tests were done with five to six concentrations and one untreated control in four replicates containing 10 individuals per vessel. The test was performed at 28 °C, in permanent darkness and it lasted 14 days. Each chemical was mixed in 250 g DW per vessel of OECD artificial, LUFA 2.2 standard, tropical artificial or tropical natural soil in acute tests. Chronic tests were performed using 150 g DW OECD artificial or LUFA 2.2 standard soil. Both adult mortality and number of juveniles showed a high sensitivity of P. pruinosus towards lambda-Cyhalothrin while Carbendazim and Benomyl had a very low and no toxicity, respectively. Further research and optimization of the chronic test design are required. |
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Palavras-Chave: |
Porcellionides pruinosus; Teste; Toxicidade. |
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Thesagro: |
Pesticida. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 01618naa a2200205 a 4500
001 1677335
005 2020-06-10
008 2005 bl uuuu u00u1 u #d
024 7 $a10.1016/j.ejsobi.2005.09.010$2DOI
100 1 $aJÄNSCH, S.
245 $aAcute and chronic isopod testing using tropical Porcellionides pruinosus and three model pesticides.
260 $c2005
520 $aAn approach for testing acute and chronic ecotoxicological effects of pesticides on isopods in the laboratory is presented. Laboratory cultures of tropical Porcellionides pruinosus were used. The pesticides Benomyl, Carbendazim and lambda-Cyhalothrin served as model chemicals. The toxicity tests were done with five to six concentrations and one untreated control in four replicates containing 10 individuals per vessel. The test was performed at 28 °C, in permanent darkness and it lasted 14 days. Each chemical was mixed in 250 g DW per vessel of OECD artificial, LUFA 2.2 standard, tropical artificial or tropical natural soil in acute tests. Chronic tests were performed using 150 g DW OECD artificial or LUFA 2.2 standard soil. Both adult mortality and number of juveniles showed a high sensitivity of P. pruinosus towards lambda-Cyhalothrin while Carbendazim and Benomyl had a very low and no toxicity, respectively. Further research and optimization of the chronic test design are required.
650 $aPesticida
653 $aPorcellionides pruinosus
653 $aTeste
653 $aToxicidade
700 1 $aGARCIA, M.
700 1 $aRÖMBKE, J.
773 $tEuropean Journal of Soil Biology$gv. 41, n. 3-4, p. 143-152, jul./dez. 2005.
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Registro original: |
Embrapa Amazônia Ocidental (CPAA) |
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