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	Provedor de dados Trop. Plant Pathol. (3) Autor ARAUJO,LEILA G. (3) FILIPPI,MARTA C. (3) PRABHU,ANNE S. (3) CUTRIM,VERIDIANO A. (1) FARIA,JOSIAS C. (1) GUIMARÃES,ELCIO P. (1) Mais... Palavra-chave Magnaporthe grisea (3) Oryza sativa (3) Rice blast (2) Differential varieties (1) Hybrid rice (1) Molecular markers (1) Partial resistance (1) Physiologic races (1) Rep-PCR analysis (1) Resistance (1) Virulence (1) Mais... Tipo do documento Info:eu-repo/semantics/article (2) Info:eu-repo/semantics/other (1) Ano 2002 (3) País Brazil (3) Idioma Inglês (3)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 3 Primeira ... 1 ... Última Genetic and phenotypic characterization of isolates of Pyricularia grisea from the rice cultivars epagri 108 and 109 in the State of Tocantins Trop. Plant Pathol. PRABHU,ANNE S.; FILIPPI,MARTA C.; ARAUJO,LEILA G.; FARIA,JOSIAS C.. An epidemic of rice (Oryza sativa) blast occurred on cultivars Epagri 108 and 109 in the municipalities of Lagoa da Confusão and Duerê in the State of Tocantins, during the rice-growing season 1998-99. DNA fingerprinting and virulence phenotype analysis were utilized to determine the diversity of Pyricularia grisea isolates collected from these cultivars in one epidemic year. Rep-PCR analysis of isolates was done by using two primer sequences from Pot2. Two distinct fingerprint groups or lineages were identified among 53 isolates collected from nine different commercial fields. The virulence pattern of isolates retrieved from these two cultivars was analyzed in artificial inoculation tests utilizing 32 genotypes in the greenhouse. A dendrogram constructed... Tipo: Info:eu-repo/semantics/other Palavras-chave: Magnaporthe grisea; Molecular markers; Oryza sativa; Rep-PCR analysis; Rice blast. Ano: 2002 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-41582002000600002 Expression of resistance in rice hybrids to Pyricularia grisea Trop. Plant Pathol. PRABHU,ANNE S.; GUIMARÃES,ELCIO P.; FILIPPI,MARTA C.; ARAUJO,LEILA G.; CUTRIM,VERIDIANO A.. Thirty-nine rice (Oryza sativa) hybrids and their restorers were assessed for vertical resistance to Pyricularia grisea in the rice blast nursery, and in artificial inoculation tests with two pathotypes, under controlled greenhouse conditions. The hybrids were developed from cytoplasmic genetic male sterile lines 046I and IR 58025A, derived from WA cytoplasm. In the rice blast nursery all hybrids showed susceptible reaction varying from 5 to 9. Compatible and incompatible leaf blast reactions of hybrids to two pathotypes, IC-1 and IB-45, were observed in inoculation tests. A majority of the hybrids were resistant when the restorer was resistant. However, seven of the 25 F1 hybrids exhibited susceptible reactions even when one of the parents was resistant... Tipo: Info:eu-repo/semantics/article Palavras-chave: Magnaporthe grisea; Rice blast; Hybrid rice; Partial resistance; Oryza sativa. Ano: 2002 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-41582002000500003 Pathotype diversity of Pyricularia grisea from improved upland rice cultivars in experimental plots Trop. Plant Pathol. PRABHU,ANNE S.; FILIPPI,MARTA C.; ARAUJO,LEILA G.. A study was undertaken to examine the pathogenic diversity of Pyricularia grisea isolates retrieved from 14 upland rice (Oryza sativa) cultivars in experimental plots during a period of five years. Inoculations were performed on 32 genotypes with 85 monoconidial isolates under controlled greenhouse conditions. Based on the reaction pattern of eight international differentials, eleven pathotypes of P. grisea were identified. The predominant international races or pathotypes were IB-9 (56.4%), IB-1 (16.4%) and IB-41 (11.8%). A set of eight commercial upland rice cultivars ('Carajás', 'Confiança', 'Maravilha', 'Primavera', 'Progresso', 'Caiapó', 'IAC-47', 'IAC-201') was utilized as additional differentials for describing the virulence pattern of P. grisea.... Tipo: Info:eu-repo/semantics/article Palavras-chave: Oryza sativa; Magnaporthe grisea; Physiologic races; Differential varieties; Resistance; Virulence. Ano: 2002 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-41582002000500005 Registros recuperados: 3 Primeira ... 1 ... Última

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