RESISTÊNCIA DO CONILON VITÓRIA 8142 À RAÇA II DE HEMILEIA VASTATRIX
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Data
2011
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Resumo
O objetivo deste trabalho foi avaliar a resistência quantitativa de 13 genótipos de conilon que compõem a variedade clonal Conilon Vitória Incaper 8142 com a raça II de H. vastatrix. Três mudas de cada genótipo foram inoculadas com a raça II monopustular de H. vastatrix pelo método do pincel no delineamento inteiramente casualizado. Os seguintes componentes de resistência foram avaliados: 1) Período de Incubação (PI), 2) Período Latente (PL), 3) Produção de Esporos (PE), 4) Área Foliar Lesionada (AFL), 5) Produção de Esporos por Área Foliar Lesionada (PEAFL), 6) Área Foliar Esporulada (AFE), 7) Produção de Esporos por Área Foliar Esporulada (PEAFE), 8) Severidade da Doença (SEV), 9) Frequência de Infecção (FI) e 10) Número Total de Pústulas (NTP). A técnica estatística multivariada de Componentes Principais (CP) foi usada para interpretação dos dados. Com esta técnica foram definidos quatro grupos de resistência das plantas: resistentes, moderadamente resistentes, moderadamente suscetíveis e suscetíveis à raça II de H. vastatrix. As plantas mais resistentes a esta raça, avaliando conjuntamente os 10 componentes de resistência foram os clones 1V, 2V, 3V e 4V do Conilon Vitória.
The aim of this study was to evaluate the quantitative resistance of 13 genotypes conilon comprising the clonal variety Conilon Vitória Incaper 8142 with race II of H. vastatrix. Three seedlings of each genotype were inoculated with race II single-uredinial of H. vastatrix by the method of brush in a randomized design. The following components of resistance were evaluated: 1) Incubation Period (PI), 2) Latent Period (PL), 3) Production of Spores (PE), 4) Diseased Leaf Area (AFL), 5) Production of spores per injured leaf area (PEAFL), 6) sporulating leaf area (AFE), 7) Spore production by sporulating leaf area (PEAFE), 8) Severity of Disease (SEV), 9) Frequency of Infection (FI) and 10) Total Number of Pustules (NTP). The Principal Component Analysis (PC) was used for data interpretation. With this technique were defined four groups of plant resistance: resistant, moderately resistant, moderately susceptible and susceptible to race II of H. vastatrix. An overall analysis with the 10 components of resistance identified clones 1V, 2V, 3V and 4V of Conilon Vitória as the most resistants to this race.
The aim of this study was to evaluate the quantitative resistance of 13 genotypes conilon comprising the clonal variety Conilon Vitória Incaper 8142 with race II of H. vastatrix. Three seedlings of each genotype were inoculated with race II single-uredinial of H. vastatrix by the method of brush in a randomized design. The following components of resistance were evaluated: 1) Incubation Period (PI), 2) Latent Period (PL), 3) Production of Spores (PE), 4) Diseased Leaf Area (AFL), 5) Production of spores per injured leaf area (PEAFL), 6) sporulating leaf area (AFE), 7) Spore production by sporulating leaf area (PEAFE), 8) Severity of Disease (SEV), 9) Frequency of Infection (FI) and 10) Total Number of Pustules (NTP). The Principal Component Analysis (PC) was used for data interpretation. With this technique were defined four groups of plant resistance: resistant, moderately resistant, moderately susceptible and susceptible to race II of H. vastatrix. An overall analysis with the 10 components of resistance identified clones 1V, 2V, 3V and 4V of Conilon Vitória as the most resistants to this race.
Descrição
Trabalho apresentado no Simpósio de Pesquisa dos Cafés do Brasil (7. : 2011 : Araxá, MG). Anais Brasília, D.F: Embrapa - Café, 2011
Palavras-chave
resistência quantitativa, resistência horizontal, ferrugem do cafeeiro, componentes principais., quantitative resistance, horizontal resistance, coffee rust, principal components.
Citação
Rosado, André W. C.; Zambolim, Laércio; Capucho, Alexandre S.; Ferrão, Romário Gava; Ferrão, Maria Amélia Gava; Fonseca, Aymbiré Francisco Almeida da; Zambolim, Eunize Maciel; Caixeta, Eveline Teixeira. Resistência do Conilon Vitória 8142 à raça II de Hemileia vastatrix. In: Simpósio de Pesquisa dos cafés do Brasil (7. : 2011 : Araxá, MG). Anais Brasília, D.F: Embrapa - Café, 2011 (1 CD-ROM), 6p.