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Registro Completo |
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Biblioteca(s): |
Embrapa Cerrados. |
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Data corrente: |
17/02/2003 |
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Data da última atualização: |
17/02/2003 |
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Autoria: |
CHAKRABORTY, S.; FERNANDES, C. D.; CHARCHAR, M. J. d'A.; THOMAS, M. R. |
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Título: |
Pathogenic variation in Colletotrichum gloeosporioides infecting stylosanthes spp. in a center of diversity in Brazil. |
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Ano de publicação: |
2002 |
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Fonte/Imprenta: |
Ecology and Population Biology, v. 92, n. 5, p. 553-562, 2002. |
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Idioma: |
Inglês |
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Conteúdo: |
Pathogenic variation in Colletotrichum gloeosporioides infecting species of the tropical pasture legume Stylosanthes at its center of diversity was determined from 296 isolates collected from wild host population and selected germ plasm of S. capitata, S. guianensis, S. scabra, and S. macrocephala in Brazil. A putative host differential set comprising 11 accessions was selected from a biossay of 18 isolates on 19 host accessions using principal component analysis. A similar analysis of anthracnose severity data for a subset of 195 isolates on the 11 differentials indicated that an adequate summary of pathogenic variation could be obtained using only five of these differentials. Of the five differentials. S- seabrana "Primar" was resistant and S. scabra "Fitzroy" was susceptible to most isolates. A cluster analysis was used to determine eight natural race clusters using the 195 isolates. Linear discriminant functions were developed of eight race clusters using the 195 isolates as the training data set, and these were applied tio classify a test data set of the remaining 101 isolates. All except 11 isolates of the test data set were classified into one of the eight race clusters. Over 10% of the 296 isolates were weakly pathogenic to all differentials and another 40% were virulent on just one differential. The unclassified isolates represent six new races with unique virulence combinations, of which one isolate is virulent on all five differentials. The majority of isolates came frm six field sites, and Shannon's index of diversity indicated considerable variation between sites. Pathogenic diversity was extensive at there sites where selected germ plasm were under evaluation, and complex race clusters and unclassified isolates representig new races were more prevalent at these sites compared with sites containing wild Stylosanthes populations. MenosPathogenic variation in Colletotrichum gloeosporioides infecting species of the tropical pasture legume Stylosanthes at its center of diversity was determined from 296 isolates collected from wild host population and selected germ plasm of S. capitata, S. guianensis, S. scabra, and S. macrocephala in Brazil. A putative host differential set comprising 11 accessions was selected from a biossay of 18 isolates on 19 host accessions using principal component analysis. A similar analysis of anthracnose severity data for a subset of 195 isolates on the 11 differentials indicated that an adequate summary of pathogenic variation could be obtained using only five of these differentials. Of the five differentials. S- seabrana "Primar" was resistant and S. scabra "Fitzroy" was susceptible to most isolates. A cluster analysis was used to determine eight natural race clusters using the 195 isolates. Linear discriminant functions were developed of eight race clusters using the 195 isolates as the training data set, and these were applied tio classify a test data set of the remaining 101 isolates. All except 11 isolates of the test data set were classified into one of the eight race clusters. Over 10% of the 296 isolates were weakly pathogenic to all differentials and another 40% were virulent on just one differential. The unclassified isolates represent six new races with unique virulence combinations, of which one isolate is virulent on all five differentials. The majority of isolates ca... Mostrar Tudo |
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Palavras-Chave: |
Brasil; Patologia vegetal; Stilosante. |
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Thesagro: |
Cerrado; Colletotrichum Gloeosporioides; Distribuição Geográfica; Variação Genética. |
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Categoria do assunto: |
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Marc: |
LEADER 02614naa a2200241 a 4500
001 1566234
005 2003-02-17
008 2002 bl --- 0-- u #d
100 1 $aCHAKRABORTY, S.
245 $aPathogenic variation in Colletotrichum gloeosporioides infecting stylosanthes spp. in a center of diversity in Brazil.
260 $c2002
520 $aPathogenic variation in Colletotrichum gloeosporioides infecting species of the tropical pasture legume Stylosanthes at its center of diversity was determined from 296 isolates collected from wild host population and selected germ plasm of S. capitata, S. guianensis, S. scabra, and S. macrocephala in Brazil. A putative host differential set comprising 11 accessions was selected from a biossay of 18 isolates on 19 host accessions using principal component analysis. A similar analysis of anthracnose severity data for a subset of 195 isolates on the 11 differentials indicated that an adequate summary of pathogenic variation could be obtained using only five of these differentials. Of the five differentials. S- seabrana "Primar" was resistant and S. scabra "Fitzroy" was susceptible to most isolates. A cluster analysis was used to determine eight natural race clusters using the 195 isolates. Linear discriminant functions were developed of eight race clusters using the 195 isolates as the training data set, and these were applied tio classify a test data set of the remaining 101 isolates. All except 11 isolates of the test data set were classified into one of the eight race clusters. Over 10% of the 296 isolates were weakly pathogenic to all differentials and another 40% were virulent on just one differential. The unclassified isolates represent six new races with unique virulence combinations, of which one isolate is virulent on all five differentials. The majority of isolates came frm six field sites, and Shannon's index of diversity indicated considerable variation between sites. Pathogenic diversity was extensive at there sites where selected germ plasm were under evaluation, and complex race clusters and unclassified isolates representig new races were more prevalent at these sites compared with sites containing wild Stylosanthes populations.
650 $aCerrado
650 $aColletotrichum Gloeosporioides
650 $aDistribuição Geográfica
650 $aVariação Genética
653 $aBrasil
653 $aPatologia vegetal
653 $aStilosante
700 1 $aFERNANDES, C. D.
700 1 $aCHARCHAR, M. J. d'A.
700 1 $aTHOMAS, M. R.
773 $tEcology and Population Biology$gv. 92, n. 5, p. 553-562, 2002.
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Registro original: |
Embrapa Cerrados (CPAC) |
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| Registros recuperados : 62 | |
| 7. |  | FELDBERG, N. P.; BARBOSA, W.; MAYER, N. A.; SANTOS, F. M. da C. Propagação vegetativa de porta-exertos de pereira por estacas semi-lenhosas. Revista Ceres, Viçosa, v. 57, n. 6, p. 810-816, nov/dez, 2010.| Tipo: Artigo em Periódico Indexado | Circulação/Nível: B - 3 |
| Biblioteca(s): Embrapa Clima Temperado. |
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| 12. | | FONSECA, K, G. da; FALEIRO, F. G.; JUNQUEIRA, N. T. V.; BARTH, M.; FELDBERG, N. P. Morphoagronomic and molecular characterization of ornamental passion fruit cultivars. Pesquisa Agropecuária Brasileira, Brasília, DF, v. 52, n. 10, p. 849-860, out. 2017. Título em português: Caracterização morfoagronômica e molecular de cultivares de maracujazeiro ornamental.| Tipo: Artigo em Periódico Indexado | Circulação/Nível: A - 2 |
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| 14. | | SILVA, G. O. da; BORTOLETTO, A. C.; FELDBERG, N. P.; NASCIMENTO, W. M. Importância da utilização de mudas sadias em hortaliças de propagação vegetativa. Revista Batata Show, p. 68-74, mar. 2022. Artigo publicado também em Seed News, Ano 24, n. 5, p. 38-42, 2021.| Tipo: Artigo de Divulgação na Mídia |
| Biblioteca(s): Embrapa Clima Temperado. |
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| 15. | | SILVA, G. O. da; BORTOLETTO, A. C.; FELDBERG, N. P.; NASCIMENTO, W. M. Importância da utilização de mudas sadias em hortaliças de propagação vegetativa. Revista Batata Show, v. 22, n. 62, p. 68-74, mar. 2022. Artigo publicado também em Seed News, Ano 24, n. 5, p. 38-42, 2021.| Tipo: Artigo de Divulgação na Mídia |
| Biblioteca(s): Embrapa Hortaliças. |
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| 17. | | BETTONI, J. C.; FELDBERG, N. P.; NAVA, G.; VEIGA, M. da; WILDNER, L. do P. Vegetative, productive and qualitative performance of grapevine "Cabernet Sauvignon" according to the use of winter cover crops¹. Revista Ceres, Viçosa, v. 63, n.4, p. 538-544, jul/ago, 2016.| Tipo: Artigo em Periódico Indexado | Circulação/Nível: B - 1 |
| Biblioteca(s): Embrapa Clima Temperado. |
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| 18. | | DECONTI, G.; MARAN, B.; RITSCHEL, P. S.; GROHS, D. S.; FELDBERG, N. P.; NACHTIGAL, J. C.; MARTINS, C. R. Avaliação de clones de videira "Bordô" para elaboração de sucos tintos. In:ENCONTRO DE INICIAÇÃO CIENTÍFICA, 19., ENCONTRO DE PÓS-GRADUAÇÃO, 15., 2022, Bento Gonçalves. Anais... Bento Gonçalves: Embrapa Uva e Vinho, 2023. p. 13. (Embrapa Uva e Vinho. Eventos Técnicos & Científicos, 1)| Tipo: Resumo em Anais de Congresso |
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| 20. | | PIO, R.; DALL´ORTO, F. A. C.; BARBOSA, W.; CHAGAS, E. A.; OJIMA, M.; FELDBERG, N. P. Desempenho produtivo de nespereiras enxertadas em marmeleiro 'Portugal'. Pesquisa Agropecuária Brasileira, Brasília, DF, v. 42, n. 12, p. 1715-1719, dez. 2007 Título em inglês: Yield performance of loquat trees graf ted on quince cultivar Portugal.| Biblioteca(s): Embrapa Unidades Centrais. |
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| Registros recuperados : 62 | |
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