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Registro Completo |
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Biblioteca(s): |
Embrapa Cerrados. |
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Data corrente: |
18/04/2002 |
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Data da última atualização: |
18/04/2002 |
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Autoria: |
PINTO, A. C. de Q.; VARGAS RAMOS, V. H.; JUNQUEIRA, N. T. V. |
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Título: |
New varieties and hybrid selections from mango hybridization program in central region of Brazil. |
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Ano de publicação: |
2000 |
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Fonte/Imprenta: |
Acta Horticulturae, Leuven, n. 509, p. 207-211, [2000?]. |
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Idioma: |
Inglês |
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Notas: |
Apresentado no "6th INTERNATIONAL SYMPOSIUM ON MANGO". |
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Conteúdo: |
The crossing work of mango hybridization program in Central Region of Brazil was started in 1983 at Cerrados (Brazilian savannah) agricultural research center CPAC, in Brasilia, Federal District. The main objective of this program is to develop a desirable Brazilian mango variety with superior characteristics which includes dwarf plant with high yield and acceptable commercial fruits (red blush peel, firm, sweet and fiberless pulp). The hybridization program started by using hand pollination work, althrough opened pollination work has been established recently. A total of 1339 hybrid selections has been obtained and two varieties (Embrapa Roxa 141 and Embrapa Alfa 142) were already released. Is this paper, the characteristics of the most promising hybrid selections and varieties are described. |
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Palavras-Chave: |
Brasil; Cultivar; Hibridizacao; Regiao Central. |
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Thesagro: |
Cerrado; Manga; Mangifera Indica. |
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Thesaurus Nal: |
Brazil; hybridization; mangoes; varieties. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 01620naa a2200289 a 4500
001 1564693
005 2002-04-18
008 2000 bl uuuu u00u1 u #d
100 1 $aPINTO, A. C. de Q.
245 $aNew varieties and hybrid selections from mango hybridization program in central region of Brazil.
260 $c2000
500 $aApresentado no "6th INTERNATIONAL SYMPOSIUM ON MANGO".
520 $aThe crossing work of mango hybridization program in Central Region of Brazil was started in 1983 at Cerrados (Brazilian savannah) agricultural research center CPAC, in Brasilia, Federal District. The main objective of this program is to develop a desirable Brazilian mango variety with superior characteristics which includes dwarf plant with high yield and acceptable commercial fruits (red blush peel, firm, sweet and fiberless pulp). The hybridization program started by using hand pollination work, althrough opened pollination work has been established recently. A total of 1339 hybrid selections has been obtained and two varieties (Embrapa Roxa 141 and Embrapa Alfa 142) were already released. Is this paper, the characteristics of the most promising hybrid selections and varieties are described.
650 $aBrazil
650 $ahybridization
650 $amangoes
650 $avarieties
650 $aCerrado
650 $aManga
650 $aMangifera Indica
653 $aBrasil
653 $aCultivar
653 $aHibridizacao
653 $aRegiao Central
700 1 $aVARGAS RAMOS, V. H.
700 1 $aJUNQUEIRA, N. T. V.
773 $tActa Horticulturae, Leuven$gn. 509, p. 207-211, [2000?].
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Registro original: |
Embrapa Cerrados (CPAC) |
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Biblioteca |
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Origem |
Tipo/Formato |
Classificação |
Cutter |
Registro |
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URL |
Voltar
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 | Acesso ao texto completo restrito à biblioteca da Embrapa Pecuária Sudeste. Para informações adicionais entre em contato com cppse.biblioteca@embrapa.br. |
Registro Completo
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Biblioteca(s): |
Embrapa Pecuária Sudeste. |
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Data corrente: |
29/08/2023 |
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Data da última atualização: |
29/08/2023 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Circulação/Nível: |
A - 2 |
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Autoria: |
CHOCOBAR, M. L. E.; BELLO, H. J. S.; BASSETTO, C. C.; SILVA-MARINHO, N. M.; SATO, L. M. N.; SPERB, C.; CHAGAS, A. C. de S.; AMARANTE, A. F. T. |
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Afiliação: |
M. L. E. CHOCOBAR, São Paulo State University; H. J. S. BELLO, São Paulo State University; C. C. BASSETTO, São Paulo State University; N. M. SILVA-MARINHO, São Paulo State University; L. M. N. SATO, São Paulo State University; C. SPERB, São Paulo State University; ANA CAROLINA DE SOUZA CHAGAS, CPPSE; A. F. T. AMARANTE, São Paulo State University. |
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Título: |
Biotic potential and pathogenicity of a Haemonchus contortus susceptible laboratory isolate compared to a resistant field isolate in Brazil. |
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Ano de publicação: |
2023 |
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Fonte/Imprenta: |
Small Ruminant Research, v. 227, oct. 2023, 107063. |
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Páginas: |
10 p. |
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DOI: |
https://doi.org/10.1016/j.smallrumres.2023.107063 |
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Idioma: |
Inglês |
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Conteúdo: |
The high prevalence of anthelmintic resistance of Haemonchus contortus is threatening sheep farming. In this context, resistant populations? replacement using susceptible isolates appears to be a strategy to overcome this situation. The aim of the present study was to evaluate the ability of a susceptible H. contortus laboratory isolate in comparison with a multiresistant field isolate to infect lambs and to study its behaviour in field conditions. Sixteen worm-free lambs were experimentally infected with 4000 infective larvae (L3) of a H. contortus anthelmintic-resistant field isolate (Group R, n = 8) or a laboratory isolate susceptible to anthelmintics (Group S, n = 8). Groups were placed in separate clean pastures, where they were kept for 266 days. Faecal egg counts (FEC) showed maximum values between 21- and 42-days post-infection (PI) and decreased over time, with no statistical differences between groups (P > 0.05). The pathogenicity of the isolates was similar, as lambs from both groups showed a decrease in packed cell volume and total plasma protein values in the beginning of the study, coinciding with the highest FECs. Production of L3 were similar for both groups, when evaluating faecal cultures kept in vitro or L3 recovered from pasture samples and from faecal pats collected from the paddocks, which suggests that both isolates have the same potential of development in vitro and in the environment. The degree of resistance/susceptibility to thiabendazole (TIA), levamisole (LEV), monepantel (MON) and ivermectin (IVE) was evaluated using the Larval Development Assay (RESISTA-Test©) 160 days PI. The resistant isolate showed a high resistance factor (RF) to TIA (141), LEV (822), MON (34) and IVE (196), while the RF of the susceptible isolate remained below three, which indicates high susceptibility to all drugs tested. Our study demonstrates that the susceptible isolate was able to infect lambs and did not show higher pathogenicity nor any differences on its biotic potential when compared to the resistant field isolate. These results indicate that the susceptible isolate has the potential to be used to replace a resistant population of H. contortus, which should be validated in long-term studies under commercial sheep farming conditions. MenosThe high prevalence of anthelmintic resistance of Haemonchus contortus is threatening sheep farming. In this context, resistant populations? replacement using susceptible isolates appears to be a strategy to overcome this situation. The aim of the present study was to evaluate the ability of a susceptible H. contortus laboratory isolate in comparison with a multiresistant field isolate to infect lambs and to study its behaviour in field conditions. Sixteen worm-free lambs were experimentally infected with 4000 infective larvae (L3) of a H. contortus anthelmintic-resistant field isolate (Group R, n = 8) or a laboratory isolate susceptible to anthelmintics (Group S, n = 8). Groups were placed in separate clean pastures, where they were kept for 266 days. Faecal egg counts (FEC) showed maximum values between 21- and 42-days post-infection (PI) and decreased over time, with no statistical differences between groups (P > 0.05). The pathogenicity of the isolates was similar, as lambs from both groups showed a decrease in packed cell volume and total plasma protein values in the beginning of the study, coinciding with the highest FECs. Production of L3 were similar for both groups, when evaluating faecal cultures kept in vitro or L3 recovered from pasture samples and from faecal pats collected from the paddocks, which suggests that both isolates have the same potential of development in vitro and in the environment. The degree of resistance/susceptibility to thiabendazole (TIA), le... Mostrar Tudo |
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Palavras-Chave: |
Anthelmintic Resistance; Nematodes; Parasitic Control; Refugia. |
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Categoria do assunto: |
H Saúde e Patologia |
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Marc: |
LEADER 03176naa a2200277 a 4500
001 2156181
005 2023-08-29
008 2023 bl uuuu u00u1 u #d
024 7 $ahttps://doi.org/10.1016/j.smallrumres.2023.107063$2DOI
100 1 $aCHOCOBAR, M. L. E.
245 $aBiotic potential and pathogenicity of a Haemonchus contortus susceptible laboratory isolate compared to a resistant field isolate in Brazil.$h[electronic resource]
260 $c2023
300 $a10 p.
520 $aThe high prevalence of anthelmintic resistance of Haemonchus contortus is threatening sheep farming. In this context, resistant populations? replacement using susceptible isolates appears to be a strategy to overcome this situation. The aim of the present study was to evaluate the ability of a susceptible H. contortus laboratory isolate in comparison with a multiresistant field isolate to infect lambs and to study its behaviour in field conditions. Sixteen worm-free lambs were experimentally infected with 4000 infective larvae (L3) of a H. contortus anthelmintic-resistant field isolate (Group R, n = 8) or a laboratory isolate susceptible to anthelmintics (Group S, n = 8). Groups were placed in separate clean pastures, where they were kept for 266 days. Faecal egg counts (FEC) showed maximum values between 21- and 42-days post-infection (PI) and decreased over time, with no statistical differences between groups (P > 0.05). The pathogenicity of the isolates was similar, as lambs from both groups showed a decrease in packed cell volume and total plasma protein values in the beginning of the study, coinciding with the highest FECs. Production of L3 were similar for both groups, when evaluating faecal cultures kept in vitro or L3 recovered from pasture samples and from faecal pats collected from the paddocks, which suggests that both isolates have the same potential of development in vitro and in the environment. The degree of resistance/susceptibility to thiabendazole (TIA), levamisole (LEV), monepantel (MON) and ivermectin (IVE) was evaluated using the Larval Development Assay (RESISTA-Test©) 160 days PI. The resistant isolate showed a high resistance factor (RF) to TIA (141), LEV (822), MON (34) and IVE (196), while the RF of the susceptible isolate remained below three, which indicates high susceptibility to all drugs tested. Our study demonstrates that the susceptible isolate was able to infect lambs and did not show higher pathogenicity nor any differences on its biotic potential when compared to the resistant field isolate. These results indicate that the susceptible isolate has the potential to be used to replace a resistant population of H. contortus, which should be validated in long-term studies under commercial sheep farming conditions.
653 $aAnthelmintic Resistance
653 $aNematodes
653 $aParasitic Control
653 $aRefugia
700 1 $aBELLO, H. J. S.
700 1 $aBASSETTO, C. C.
700 1 $aSILVA-MARINHO, N. M.
700 1 $aSATO, L. M. N.
700 1 $aSPERB, C.
700 1 $aCHAGAS, A. C. de S.
700 1 $aAMARANTE, A. F. T.
773 $tSmall Ruminant Research$gv. 227, oct. 2023, 107063.
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Embrapa Pecuária Sudeste (CPPSE) |
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