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Registro Completo |
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Biblioteca(s): |
Embrapa Mandioca e Fruticultura. |
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Data corrente: |
06/04/2004 |
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Data da última atualização: |
06/04/2004 |
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Autoria: |
RESTREPO, S; DUQUE, M. C; LOSADA VALE, T; VERDIER, V. |
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Título: |
Genetic differentiation of Brazilian strains of xanthomonas axonopodis pv. manihotis by RFLP, AFLP e virulence analysis. |
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Ano de publicação: |
1998 |
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Fonte/Imprenta: |
Revista Brasileira de Mandioca,Cruz das Almas, v.17, p.42, nov., 1998. Suplemento. |
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Idioma: |
Inglês |
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Conteúdo: |
Abstract: Brazil considered as the major cassava-producing country in the world with 24 million tons. An important and limiing factor of cassava production in the South and Center of Brazil is the cassava bacterial blight disease (CBB) caused by Xanthomonas axonopodis pv. manihotis (Xam). This pathogen is characterid by the induction of a wide combination of symptoms. The deployment of resistant varieties is the more appropriate and realistic approach to control the bacterial blight disease. For many years, the development and release of release germplasm has been limied due in part to lack of knowledge of the pathogens variability. The present study has been conducted in order to assess the genetic and pathogenic variation of Brazilian strains are originated from four major cassava growing regions corresponding to different edaphoclimatic zones (ECZ). A Xam population that was collected in different sites in São Paulo state (located in ECZ6) was more extensively studied. The Brazilian population was analyzed by RFLP, AFLP and a virulence analysis. A multiple correspondence analysis, used to evaluate the genetic relatedness among strains, and the measurement of genetic diversity indicated that the pathogen showed high levels of diverdity and geographical differentiation. Brazilian Xam strains were classified in 38 RFLP haplotypes. Virulence data were not linked to haplotypes groups. Patterns of migration of Xam strains within the São Saulo state were observed. AFLP fingerprinting allowed the assessment of the genetic - relationships between Xam strains The information we provide will be useful for the selection of a specific set of Xam strains for screening germplasm adapted to each region. MenosAbstract: Brazil considered as the major cassava-producing country in the world with 24 million tons. An important and limiing factor of cassava production in the South and Center of Brazil is the cassava bacterial blight disease (CBB) caused by Xanthomonas axonopodis pv. manihotis (Xam). This pathogen is characterid by the induction of a wide combination of symptoms. The deployment of resistant varieties is the more appropriate and realistic approach to control the bacterial blight disease. For many years, the development and release of release germplasm has been limied due in part to lack of knowledge of the pathogens variability. The present study has been conducted in order to assess the genetic and pathogenic variation of Brazilian strains are originated from four major cassava growing regions corresponding to different edaphoclimatic zones (ECZ). A Xam population that was collected in different sites in São Paulo state (located in ECZ6) was more extensively studied. The Brazilian population was analyzed by RFLP, AFLP and a virulence analysis. A multiple correspondence analysis, used to evaluate the genetic relatedness among strains, and the measurement of genetic diversity indicated that the pathogen showed high levels of diverdity and geographical differentiation. Brazilian Xam strains were classified in 38 RFLP haplotypes. Virulence data were not linked to haplotypes groups. Patterns of migration of Xam strains within the São Saulo state were observed. AFLP fingerpr... Mostrar Tudo |
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Categoria do assunto: |
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Marc: |
LEADER 02233naa a2200157 a 4500
001 1651855
005 2004-04-06
008 1998 bl uuuu u00u1 u #d
100 1 $aRESTREPO, S
245 $aGenetic differentiation of Brazilian strains of xanthomonas axonopodis pv. manihotis by RFLP, AFLP e virulence analysis.
260 $c1998
520 $aAbstract: Brazil considered as the major cassava-producing country in the world with 24 million tons. An important and limiing factor of cassava production in the South and Center of Brazil is the cassava bacterial blight disease (CBB) caused by Xanthomonas axonopodis pv. manihotis (Xam). This pathogen is characterid by the induction of a wide combination of symptoms. The deployment of resistant varieties is the more appropriate and realistic approach to control the bacterial blight disease. For many years, the development and release of release germplasm has been limied due in part to lack of knowledge of the pathogens variability. The present study has been conducted in order to assess the genetic and pathogenic variation of Brazilian strains are originated from four major cassava growing regions corresponding to different edaphoclimatic zones (ECZ). A Xam population that was collected in different sites in São Paulo state (located in ECZ6) was more extensively studied. The Brazilian population was analyzed by RFLP, AFLP and a virulence analysis. A multiple correspondence analysis, used to evaluate the genetic relatedness among strains, and the measurement of genetic diversity indicated that the pathogen showed high levels of diverdity and geographical differentiation. Brazilian Xam strains were classified in 38 RFLP haplotypes. Virulence data were not linked to haplotypes groups. Patterns of migration of Xam strains within the São Saulo state were observed. AFLP fingerprinting allowed the assessment of the genetic - relationships between Xam strains The information we provide will be useful for the selection of a specific set of Xam strains for screening germplasm adapted to each region.
700 1 $aDUQUE, M. C
700 1 $aLOSADA VALE, T
700 1 $aVERDIER, V.
773 $tRevista Brasileira de Mandioca,Cruz das Almas$gv.17, p.42, nov., 1998. Suplemento.
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Embrapa Mandioca e Fruticultura (CNPMF) |
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| 2. |  | BLAIR, M. W.; BUENDIA, H. F.; DIAZ, L.; DIAZ, J. M.; GIRALDO, M. C.; MORENO, N.; GONZALEZ, L.; DUQUE, M. C.; DEBOUCK, D.; ZHANG, X.; WANG, S.; PELOSO, M. J.; BRONDANI, R.; BORBA, T. O.; KRESOVICH, S.; MITCHELL, S. E.; ASFAW, A.; KIMANI, P.; CHIRWA, R.; AVILA, T.; ROJAS, X.; DAVILA, A.; GIL, H.; PÉREZ, N. M.; ACOSTA, J.; LORIGADOS, S. World-wide common bean (Phaseolus vulgaris L.) diversity and race structure. Cali: CIAT, 2008. 1 p. Poster.| Tipo: Resumo em Anais de Congresso |
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