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	Provedor de dados Trop. Plant Pathol. (5) Autor FILIPPI,MARTA C. (5) PRABHU,ANNE S. (5) ARAUJO,LEILA G. (3) ARAÚJO,LEILA G. (1) CUTRIM,VERIDIANO A. (1) FARIA,JOSIAS C. (1) GUIMARÃES,ELCIO P. (1) Mais... Palavra-chave Oryza sativa (4) Magnaporthe grisea (3) Molecular markers (2) Rice blast (2) Differential varieties (1) Disease resistance (1) Doenças de arroz (1) Etiologia (1) Hybrid rice (1) Partial resistance (1) Patogenicidade (1) Physiologic races (1) Pyricularia grisea (1) Rep-PCR analysis (1) Resistance (1) Resistência varietal (1) Somaclonal variation (1) Virulence (1) Mais... Tipo do documento Info:eu-repo/semantics/article (3) Info:eu-repo/semantics/other (2) Ano 2002 (5) País Brazil (5) Idioma Inglês (4) Português (1)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 5 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 Identification of rapd marker linked to blast resistance gene in a somaclone of rice cultivar Araguaia Trop. Plant Pathol. ARAÚJO,LEILA G.; PRABHU,ANNE S.; FILIPPI,MARTA C.. The gene Pi-ar confers resistance to Pyricularia grisea race IB-45 in a somaclone derived from immature panicles of the susceptible rice (Oryza sativa) cultivar Araguaia. RAPD technique was used to identify molecular markers linked to this gene utilizing bulked segregant analysis. Initially, the two parental DNAs from the resistant donor SC09 and 'Araguaia' were analyzed using random primers. Of the 240 primers tested, 203 produced amplification products. The two parental DNAs along with the resistant and susceptible bulks of F2 population were screened using 48 primers that differentiated resistant and susceptible parents. Even though eight primers differentiated the resistant bulk from the susceptible bulk, as well as somaclone SC09 and 'Araguaia', only... Tipo: Info:eu-repo/semantics/article Palavras-chave: Molecular markers; Disease resistance; Somaclonal variation; Pyricularia grisea. Ano: 2002 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-41582002000200010 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 Ocorrência do mal-do-pé causado por Gaeumannomyces graminis var. graminis, uma nova enfermidade em arroz no Brasil Trop. Plant Pathol. PRABHU,ANNE S.; FILIPPI,MARTA C.. O mal-do-pé em arroz (Oryza sativa) foi constatado em lavouras de terras altas nos municípios de Unaí (MG), Palmeiras (GO), Itaberaí (GO), Humaitá (AM) e em lavouras irrigadas nos Estados de Goiás, Tocantins e Rio Grande de Sul. O agente causal foi identificado como Gaeumannomyces graminis var. graminis baseado em características morfológicas, culturais e testes de patogenicidade utilizando diferentes isolados brasileiros. O método de inoculação e avaliação da doença em de casa de vegetação foi descrito. Este é o primeiro registro desta enfermidade na cultura do arroz no Brasil. Tipo: Info:eu-repo/semantics/other Palavras-chave: Oryza sativa; Doenças de arroz; Patogenicidade; Etiologia; Resistência varietal. Ano: 2002 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-41582002000400016 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: 5 Primeira ... 1 ... Última

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