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Registro Completo |
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Biblioteca(s): |
Embrapa Mandioca e Fruticultura. |
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Data corrente: |
14/10/2009 |
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Data da última atualização: |
27/01/2010 |
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Tipo da produção científica: |
Resumo em Anais de Congresso |
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Autoria: |
WAALWIJK, C.; DITA, M. A.; BUDDENHAGEN, I.; PAIVA, L. V. K.; SOUZA JUNIOR, M. T.; KEMA, G. H. J. |
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Afiliação: |
C. Waalwijk, PRI-Plant Research International; Miguel Angel Dita, CNPMF; I. Buddenhagen; Luciano Vilela K. PAIVA, UFL; Manoel Teixeira Souza Junior, LABEX Europe; G. H. J. Kema, PRI-Plant Research International. |
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Título: |
Development of a detection method for tropical race 4 of Fusarium oxysporum f. sp. cubense. |
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Ano de publicação: |
2009 |
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Fonte/Imprenta: |
In: ISHS/PROMUSA BANANA SYMPOSIUM, 2009, Guangzhou, China. Global perspectives on asian challenges: programme and abstracts. Guangzhou: ISHS: Promusa, 2009. p.38. |
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Idioma: |
Inglês |
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Conteúdo: |
Fusarium oxysporum f. sp. cubense (Foc) is the causal agent of Fusarium wilt, the devastating disease that ruined the 'Gros Michel' (AAA)-based banana production in the early 1900s. The occurrence of a new variant, called tropical race 4 (TR4), in Southeast Asia that overcomes the resistance in Cavendish clones such as 'Grand Naine' (AAA) is a major concern to current banana production worldwide. The threat posed by this new variant could be overcome by the introduction of resistant cultivars. However, the identification of new resistant sources or breeding for resistance is a log-term effort. At the moment, the only option to control the disease is to eradicate infected plants and isolate infested plantations, to avoid or reduce the spread of the paathogen. This requires a sensitive and highly specific diagnostic that enables early detection of the pathogen and prevents false positives as this will have dramatic economic consequences for the banana growers. A two-locus database of DNA sequences, from over 800 different isolates from multiple formae speciales of F. oxysporum, was used to develop a molecular diagnostic tool that specifically detects isolates from the vegetative Compatibility Group (VCG) 01213, which encompasses the Foc TR4 genotypes. This diagnostic tool was able to detect all Foc TR4 isolates tested, while none of the Foc isolates from 19 VCGS other than 01213 showed any reaction. In addition, the developed diagnostic tool was able to detect Foc TR4 when using DNA samples from different tissues of 'Grand Naine' plants inoculated with TR4 isolates. Details on specificity, sensitivity and accuracy will be presented. MenosFusarium oxysporum f. sp. cubense (Foc) is the causal agent of Fusarium wilt, the devastating disease that ruined the 'Gros Michel' (AAA)-based banana production in the early 1900s. The occurrence of a new variant, called tropical race 4 (TR4), in Southeast Asia that overcomes the resistance in Cavendish clones such as 'Grand Naine' (AAA) is a major concern to current banana production worldwide. The threat posed by this new variant could be overcome by the introduction of resistant cultivars. However, the identification of new resistant sources or breeding for resistance is a log-term effort. At the moment, the only option to control the disease is to eradicate infected plants and isolate infested plantations, to avoid or reduce the spread of the paathogen. This requires a sensitive and highly specific diagnostic that enables early detection of the pathogen and prevents false positives as this will have dramatic economic consequences for the banana growers. A two-locus database of DNA sequences, from over 800 different isolates from multiple formae speciales of F. oxysporum, was used to develop a molecular diagnostic tool that specifically detects isolates from the vegetative Compatibility Group (VCG) 01213, which encompasses the Foc TR4 genotypes. This diagnostic tool was able to detect all Foc TR4 isolates tested, while none of the Foc isolates from 19 VCGS other than 01213 showed any reaction. In addition, the developed diagnostic tool was able to detect Foc TR4 when usi... Mostrar Tudo |
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Thesagro: |
Banana; Doença de Planta; Fusariose. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 02376naa a2200217 a 4500
001 1656061
005 2010-01-27
008 2009 bl uuuu u00u1 u #d
100 1 $aWAALWIJK, C.
245 $aDevelopment of a detection method for tropical race 4 of Fusarium oxysporum f. sp. cubense.
260 $c2009
520 $aFusarium oxysporum f. sp. cubense (Foc) is the causal agent of Fusarium wilt, the devastating disease that ruined the 'Gros Michel' (AAA)-based banana production in the early 1900s. The occurrence of a new variant, called tropical race 4 (TR4), in Southeast Asia that overcomes the resistance in Cavendish clones such as 'Grand Naine' (AAA) is a major concern to current banana production worldwide. The threat posed by this new variant could be overcome by the introduction of resistant cultivars. However, the identification of new resistant sources or breeding for resistance is a log-term effort. At the moment, the only option to control the disease is to eradicate infected plants and isolate infested plantations, to avoid or reduce the spread of the paathogen. This requires a sensitive and highly specific diagnostic that enables early detection of the pathogen and prevents false positives as this will have dramatic economic consequences for the banana growers. A two-locus database of DNA sequences, from over 800 different isolates from multiple formae speciales of F. oxysporum, was used to develop a molecular diagnostic tool that specifically detects isolates from the vegetative Compatibility Group (VCG) 01213, which encompasses the Foc TR4 genotypes. This diagnostic tool was able to detect all Foc TR4 isolates tested, while none of the Foc isolates from 19 VCGS other than 01213 showed any reaction. In addition, the developed diagnostic tool was able to detect Foc TR4 when using DNA samples from different tissues of 'Grand Naine' plants inoculated with TR4 isolates. Details on specificity, sensitivity and accuracy will be presented.
650 $aBanana
650 $aDoença de Planta
650 $aFusariose
700 1 $aDITA, M. A.
700 1 $aBUDDENHAGEN, I.
700 1 $aPAIVA, L. V. K.
700 1 $aSOUZA JUNIOR, M. T.
700 1 $aKEMA, G. H. J.
773 $tIn: ISHS/PROMUSA BANANA SYMPOSIUM, 2009, Guangzhou, China. Global perspectives on asian challenges: programme and abstracts. Guangzhou: ISHS: Promusa, 2009. p.38.
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Registro original: |
Embrapa Mandioca e Fruticultura (CNPMF) |
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 | Acesso ao texto completo restrito à biblioteca da Embrapa Clima Temperado. Para informações adicionais entre em contato com cpact.biblioteca@embrapa.br. |
Registro Completo
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Biblioteca(s): |
Embrapa Clima Temperado. |
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Data corrente: |
09/11/2022 |
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Data da última atualização: |
09/11/2022 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Circulação/Nível: |
B - 1 |
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Autoria: |
BUENO, V. R.; HEIDEN, G. |
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Afiliação: |
VINICIUS RESENDE BUENO, UNIVERSIDADE FEDERAL DO RIO GRANDE DO SUL; GUSTAVO HEIDEN, CPACT. |
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Título: |
Novelties in Calea sect. Meyeria (Asteraceae, Neurolaeneae) from Brazil. |
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Ano de publicação: |
2022 |
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Fonte/Imprenta: |
Systematic Botany, v. 47, n. 2, p. 575-585, 2022. |
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ISSN: |
1548-2324 |
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DOI: |
https://doi.org/10.1600/036364422X16512564801632 |
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Idioma: |
Inglês |
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Conteúdo: |
We herein present nomenclatural and taxonomic novelties in Calea sect. Meyeria from Brazil. Calea pruskiana is a new species related to C. triantha and can be distinguished by the acute or cuneate, rarely attenuate leaf apex (vs. obtuse), slightly branched capitulescence (vs. profusely branched), and rayflorets 18?21.7 mm long (vs. 9.2?15.3 mm). Calea hispida f. subintegerrima is lectotypified, recombined, and elevated to species level as Calea subintegerrima, which also resembles C. triantha, however differs from it by the usually glabrous abaxial leaf surface (vs. usually hispid), glandular-punctate peduncle (vs. glands absent), and cypselae with hirsute ribs (vs. pilose ribs). These species are described and illustrated, their geographic distributions are mapped, and their taxonomic affinities are discussed. Furthermore, a new terminology is proposed to describe more accurately the pappus scale size variation according to the relative length of the scales and the occurrence of combinations of pappus scales of different lengths in the same capitulum. |
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Palavras-Chave: |
Calea pruskiana; Mata Atlântica. |
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Thesagro: |
Botânica; Compositae; Taxonomia. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 01719naa a2200217 a 4500
001 2148157
005 2022-11-09
008 2022 bl uuuu u00u1 u #d
022 $a1548-2324
024 7 $ahttps://doi.org/10.1600/036364422X16512564801632$2DOI
100 1 $aBUENO, V. R.
245 $aNovelties in Calea sect. Meyeria (Asteraceae, Neurolaeneae) from Brazil.$h[electronic resource]
260 $c2022
520 $aWe herein present nomenclatural and taxonomic novelties in Calea sect. Meyeria from Brazil. Calea pruskiana is a new species related to C. triantha and can be distinguished by the acute or cuneate, rarely attenuate leaf apex (vs. obtuse), slightly branched capitulescence (vs. profusely branched), and rayflorets 18?21.7 mm long (vs. 9.2?15.3 mm). Calea hispida f. subintegerrima is lectotypified, recombined, and elevated to species level as Calea subintegerrima, which also resembles C. triantha, however differs from it by the usually glabrous abaxial leaf surface (vs. usually hispid), glandular-punctate peduncle (vs. glands absent), and cypselae with hirsute ribs (vs. pilose ribs). These species are described and illustrated, their geographic distributions are mapped, and their taxonomic affinities are discussed. Furthermore, a new terminology is proposed to describe more accurately the pappus scale size variation according to the relative length of the scales and the occurrence of combinations of pappus scales of different lengths in the same capitulum.
650 $aBotânica
650 $aCompositae
650 $aTaxonomia
653 $aCalea pruskiana
653 $aMata Atlântica
700 1 $aHEIDEN, G.
773 $tSystematic Botany$gv. 47, n. 2, p. 575-585, 2022.
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Embrapa Clima Temperado (CPACT) |
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