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Registro Completo |
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Biblioteca(s): |
Epagri-Sede. |
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Data corrente: |
31/10/2011 |
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Data da última atualização: |
31/10/2011 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
LOURENÇO JÚNIOR, V.; RODRIGUES, T. T. M. S.; CAMPOS, A. M. D.; BRAGANCA, C. D.; SCHEUERMANN, K. K.; REIS, A.; BROMMONSCHENKEL, S. H.; MAFFIA, L. A.; MIZUBUTI, E. S. G. |
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Afiliação: |
Epagri |
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Título: |
Genetic Structure of the Population of Alternaria solani in Brazil. |
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Ano de publicação: |
2011 |
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Fonte/Imprenta: |
Journal Of Phytopathology, Wiley, v. 159, p. 233-240, 2011. |
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Idioma: |
Português |
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Notas: |
ISSN, 1439-0434 |
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Conteúdo: |
Understanding the genetic structure of the population of Alternaria solani (AS) is an important component of epidemiological studies of early blight, a severe disease that affects potato (Po) and tomato (To) worldwide. Up to 150 isolates obtained from both hosts were analysed with RAPD and AFLP markers to estimate the amount and distribution of genetic variability of AS in Brazil. Using RAPD, gene diversity (h = 0.20) and scaled indices of diversity of Shannon (H¢ = 0.66) and Stoddart and Taylor#2;s (G = 0.31) for the Po population were higher than those of the To (h = 0.07, H¢ = 0.34, G = 0.17). For AFLP, the statistics for the Po (h = 0.17, H¢ = 0.86, G = 0.49) and To (h = 0.17, H¢ = 0.85, G = 0.36) populations were similar. For each RAPD and AFLP locus, the allele frequency for the overall population ranged from 0.006 to 0.988, and 0.007 to 0.993, respectively. Genetic differentiation was high (GST = 0.41 and h = 0.59) and moderately high (GST = 0.23 and h = 0.37) when estimated with RAPD and AFLP, respectively. Based on cluster analyses, there was strong evidence of association of pathogen haplotypes with host species. The null hypothesis of random association of alleles was rejected in the analysis of both RAPD (IA = 13.1, P < 0.001) and AFLP (IA = 2.2, P < 0.001) markers. The average number of migrants was estimated to be around one and two individuals per generation, using RAPD and AFLP, respectively. There was no correlation between genetic distance and geographical origin of AS haplotypes for RAPD (r = )0.07, P = 0.84) and AFLP (r = 0.03, P = 0.70). The AS population is clonal with high genetic variability, and there is genetic differentiation between the populations that affect To and Po. MenosUnderstanding the genetic structure of the population of Alternaria solani (AS) is an important component of epidemiological studies of early blight, a severe disease that affects potato (Po) and tomato (To) worldwide. Up to 150 isolates obtained from both hosts were analysed with RAPD and AFLP markers to estimate the amount and distribution of genetic variability of AS in Brazil. Using RAPD, gene diversity (h = 0.20) and scaled indices of diversity of Shannon (H¢ = 0.66) and Stoddart and Taylor#2;s (G = 0.31) for the Po population were higher than those of the To (h = 0.07, H¢ = 0.34, G = 0.17). For AFLP, the statistics for the Po (h = 0.17, H¢ = 0.86, G = 0.49) and To (h = 0.17, H¢ = 0.85, G = 0.36) populations were similar. For each RAPD and AFLP locus, the allele frequency for the overall population ranged from 0.006 to 0.988, and 0.007 to 0.993, respectively. Genetic differentiation was high (GST = 0.41 and h = 0.59) and moderately high (GST = 0.23 and h = 0.37) when estimated with RAPD and AFLP, respectively. Based on cluster analyses, there was strong evidence of association of pathogen haplotypes with host species. The null hypothesis of random association of alleles was rejected in the analysis of both RAPD (IA = 13.1, P < 0.001) and AFLP (IA = 2.2, P < 0.001) markers. The average number of migrants was estimated to be around one and two individuals per generation, using RAPD and AFLP, respectively. There was no correlation between genetic distance and geographical ... Mostrar Tudo |
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Palavras-Chave: |
Early blight; Molecular epidemiology; Population biology; Potato; Tomato. |
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Categoria do assunto: |
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Marc: |
LEADER 02259naa a2200193 a 4500
001 1081700
005 2011-10-31
008 2011 bl uuuu u00u1 u #d
100 1 $aEpagri
245 $aGenetic Structure of the Population of Alternaria solani in Brazil.
260 $c2011
500 $aISSN, 1439-0434
520 $aUnderstanding the genetic structure of the population of Alternaria solani (AS) is an important component of epidemiological studies of early blight, a severe disease that affects potato (Po) and tomato (To) worldwide. Up to 150 isolates obtained from both hosts were analysed with RAPD and AFLP markers to estimate the amount and distribution of genetic variability of AS in Brazil. Using RAPD, gene diversity (h = 0.20) and scaled indices of diversity of Shannon (H¢ = 0.66) and Stoddart and Taylor#2;s (G = 0.31) for the Po population were higher than those of the To (h = 0.07, H¢ = 0.34, G = 0.17). For AFLP, the statistics for the Po (h = 0.17, H¢ = 0.86, G = 0.49) and To (h = 0.17, H¢ = 0.85, G = 0.36) populations were similar. For each RAPD and AFLP locus, the allele frequency for the overall population ranged from 0.006 to 0.988, and 0.007 to 0.993, respectively. Genetic differentiation was high (GST = 0.41 and h = 0.59) and moderately high (GST = 0.23 and h = 0.37) when estimated with RAPD and AFLP, respectively. Based on cluster analyses, there was strong evidence of association of pathogen haplotypes with host species. The null hypothesis of random association of alleles was rejected in the analysis of both RAPD (IA = 13.1, P < 0.001) and AFLP (IA = 2.2, P < 0.001) markers. The average number of migrants was estimated to be around one and two individuals per generation, using RAPD and AFLP, respectively. There was no correlation between genetic distance and geographical origin of AS haplotypes for RAPD (r = )0.07, P = 0.84) and AFLP (r = 0.03, P = 0.70). The AS population is clonal with high genetic variability, and there is genetic differentiation between the populations that affect To and Po.
653 $aEarly blight
653 $aMolecular epidemiology
653 $aPopulation biology
653 $aPotato
653 $aTomato
773 $tJournal Of Phytopathology, Wiley$gv. 159, p. 233-240, 2011.
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| 1. |  | LOURENÇO JÚNIOR, V.; RODRIGUES, T. T. M. S.; CAMPOS, A. M. D.; BRAGANCA, C. D.; SCHEUERMANN, K. K.; REIS, A.; BROMMONSCHENKEL, S. H.; MAFFIA, L. A.; MIZUBUTI, E. S. G. Genetic Structure of the Population of Alternaria solani in Brazil. Journal Of Phytopathology, Wiley, v. 159, p. 233-240, 2011. ISSN, 1439-0434| Tipo: Artigo em Periódico Indexado | Circulação/Nível: -- - -- |
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