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| Registros recuperados: 31 | |
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| MELLO, R. N.; MORAIS JUNIOR, O. P.; ABREU, A. G.; BORBA, T. C. O.. |
| Rice germplasm banks have many promising sources of resistance to pathogens. However, identification of resistant genotypes is often arduous, notably when the host-pathogen relationship is complex as in rice blast. In addition, selection of representative Magnaporthe oryzae isolates to adequately identify sources of broad-spectrum resistance is challenging. To overcome these obstacles, data from pathogenicity assays were analyzed as a factorial design, where the pairwise combination comprised rice genotypes and blast isolates. Using this methodology, we aimed to access information about host resistance. |
| Tipo: Parte de livro |
Palavras-chave: Arroz; Oryza sativa; Brusone; Doença de planta; Resistência; Blast disease; Bayesian theory; Magnaporthe oryzae. |
| Ano: 2016 |
URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1058998 |
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| ARAUJO, L.; SOARES, J. M.; FILIPPI, M. C. C. de; RODRIGUES, F. A.. |
| Blast, caused by the fungus Pyricularia oryzae, is an important disease affecting rice and wheat yield worldwide. This study investigated the cytological aspects of incompatible (non-host resistance) and compatible (host resistance) rice- (R_Po) and wheat- (W_Po) Pyricularia oryzae isolate interactions. Inoculations of rice and wheat with the R_Po and W_Po isolates of P. oryzae, respectively, were expected to be compatible interactions (host resistance), whereas inoculations of rice and wheat with the W_Po and R_Po isolates of P. oryzae, respectively, were considered to be incompatible interactions (non-host resistance). For the compatible interactions (rice-R_Po and wheat-W_Po), fungal hyphae penetrated and colonized the epidermal cells and also invaded... |
| Tipo: Artigo de periódico |
Palavras-chave: Host resistance.; Arroz; Oryza sativa; Doença de planta; Brusone; Trigo; Triticum aestivum; Blast disease; Magnaporthe oryzae.. |
| Ano: 2016 |
URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1044441 |
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| Araujo,Leonardo; Soares,Juliana Moreira; Filippi,Marta Cristina Corsi de; Rodrigues,Fabrício Ávila. |
| ABSTRACT Blast, caused by the fungus Pyricularia oryzae, is an important disease affecting rice and wheat yield worldwide. This study investigated the cytological aspects of incompatible (non-host resistance) and compatible (host resistance) rice- (R_Po) and wheat- (W_Po) Pyricularia oryzae isolate interactions. Inoculations of rice and wheat with the R_Po and W_Po isolates of P. oryzae, respectively, were expected to be compatible interactions (host resistance), whereas inoculations of rice and wheat with the W_Po and R_Po isolates of P. oryzae, respectively, were considered to be incompatible interactions (non-host resistance). For the compatible interactions (rice-R_Po and wheat-W_Po), fungal hyphae penetrated and colonized the epidermal cells and also... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Magnaporthe oryzae; Oryza sativa; Triticum aestivum L; Blast disease; Host resistance. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162016000200177 |
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| CARVALHO, J. C. B. de; CHAIBUB, A. A.; SOUSA, K. C. I.; BRITO, D. C. de; FILIPPI, M. C. C. de; ARAÚJO, L. G. de. |
| Waitea circinata (Warcup & Talbot) is an orchid antagonist mycorrhizal fungus with biocontrol potential against rice pathogens. This study aimed to optimize the extraction method, obtain a new extract and evaluate its efficiency against rice pathogens in vitro and in vivo, as well as to compare it with other extraction methods and W. circinata. The extracts were obtained and screened for in vitro growth inhibition against the pathogens Cochliobolus miyabeanus, Monographella albescens and Sarocladium oryzae, using the following extracts: mycelial, crude, lyophilized and mycelial mass. An additional in vitro assay was performed with the principal rice pathogen (Magnaporthe oryzae), in order to evaluate the conidial germination and appressorium formation.... |
| Tipo: Artigo de periódico |
Palavras-chave: Biocontrole; Waitea circinata; Biocontrol; Brusone; Escaldadura; Mancha Parda; Podridão; Arroz; Fungo; Fungal brown spot; Blast disease; Rice. |
| Ano: 2021 |
URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1148055 |
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| DIANESE, A. de C.; ZACARONI, A. B.; SOUZA, B. C. P. de; PAGANI, A. P. da S.; PINHEIRO, N. O.; GOMES, E. M. de C.; TORRES, G. A. M.; CONSOLI, L.; CAFÉ-FILHO, A. CORRÊA. |
| Abstract: Wheat blast caused by Magnaporthe oryzae pathotype Triticum (MoT) has become an important fungal disease on wheat and is now present in most of the important wheat-producing tropical regions of the world. This study evaluated head blast incidence on the spikes of 281 hexaploid wheat genotypes and two Triticum durum cultivars across three years (2011?2013) in the Cerrado Biome in the Brazilian Midwest, a hotspot area and where the highest disease levels have been recorded. Forty eight host lines exhibiting moderate to high resistance to the disease included synthetic hexaploid wheat genotypes (SHW) and derivatives (17), breeding lines (16), landraces (2), and cultivars (13). Thirty early genotypes were identified to have head blast incidence... |
| Tipo: Artigo de periódico |
Palavras-chave: Cultivares; Blast reaction; Trigo; Brusone; Cerrado; Ecossistema; Fungo; Pyricularia Oryzae; Magnaporthe oryzae; Wheat; Cultivars; Pathotypes; Landraces; Hexaploidy; Head; Fungi; Ecosystems; Disease incidence; Triticum turgidum subsp. durum; Blast disease. |
| Ano: 2021 |
URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1140557 |
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| AGHNOUM, R; BVINDI, C.; MENET, G.; D’HOOP, B.; MACIEL, J. L. N.; NIKS, R. E.. |
| Blast disease, caused by the Magnapor the oryzae/griseaspecies complex, occurs in a wide rangeof wild and cultivated gramineous plant species including rice, wheat and barley. We inoculated a collection of cultivated (Hordeum vulgaressp.vul-gareL.) and wild (ssp.spontaneum) barley accessions with M. oryzae Oryzapathotype (MoO),Triticumpathotype (MoT) and Pennisetumpathotype (MsP) to quantify the host status of barley, and to identify sources of blast resistance. Unlike wheat, the barleygene pool is rich with sources of complete and partialresistance againstMagnaporthe. Cultivated barleyappeared a nonhost to MsP, whereas wild barleyshowed some degree of susceptibility. All 153 testedrice accessions were resistant to the MoT isolate,suggesting that rice is... |
| Tipo: Artigo de periódico |
Palavras-chave: Association mapping; QTL mapping; Mlo; GWAS; Blast fungi; Magnaporthe blast fungi; Magnaporthe oryzae/grisea; Barley; Blast disease; Magnaporthe oryzae; Triticum. |
| Ano: 2019 |
URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1121056 |
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| CRUZ, C. D.; SANTANA, F. M.; TODD, T. C.; MACIEL, J. L. N.; KIYUNA, J.; BALDELOMAR, D. F.; CRUZ, A. P.; SEIXAS, C. D. S.; GOULART, A. C. P.; SUSSEL, A. A. B.; SCHIPANSKI, C. A.; CHAGAS, D. F.; COELHO, M.; MONTECELLI, T. D. N.; UTIAMADA, C.; CUSTODIO, A. P.; RIVADENEIRA, M. G.; BOCKUS, W. W.; VALENT, B.. |
| Tipo: Artigo de periódico |
Palavras-chave: Eficácia de fungicida; Trigo; Brusone; Pyricularia Oryzae; Fungicida; Doença de Planta; Blast disease; Magnaporthe grisea; Magnaporthe oryzae; Wheat. |
| Ano: 2019 |
URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1108168 |
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| Dorigan, Adriano Francis; Carvalho, Giselle de; Poloni, Nadia Maria; Negrisoli, Matheus Mereb; Maciel, João Leodato Nunes; Ceresini, Paulo Cezar. |
| Triazole fungicides have not been effective for managing the wheat blast disease in Brazil. A broad analysis across six geographical populations of Pyricularia graminis-tritici in central-southern Brazil indicated a high level of resistance to triazole fungicides. Since P. graminis-tritici is also associated with others poaceous species, here, we analyzed whether triazole-resistant isolates of the blast pathogen could be recovered from other poaceous hosts that are invasive of sprayed wheat fields. In addition to P. graminis-tritici (Pygt), we also evaluated the levels of sensitivity of three other grass-associated blast pathogens, which included P. grisea (Pg), P. pennisetigena (Pp), and P. urashimae (Pu). Resistance to the triazole fungicides... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Blast disease; CYP51A gene; Sterol demethylation inhibitor (DMI) fungicides; Epoxiconazole; Tebuconazole; Resistência a fungicidas na agricultura / Fungicide resistance in agriculture. |
| Ano: 2019 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/39332 |
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| DORIGAN, A. F.; CARVALHO, G.; POLONI, N. M.; NEGRISOLI, M. M.; MACIEL, J. L. N.; CERESINI, P. C.. |
| Triazole fungicides have not been effective for managing the wheat blast disease in Brazil. A broad analysis across six geographicalpopulations of Pyricularia graminis-triticiin central-southern Brazil indicated a high level of resistance to triazole fungicides. Since P.graminis-triticiis also associated with others poaceous species,here, we analyzed whether triazole-resistant isolates of the blast pathogencould be recovered from other poaceous hosts that are invasive of sprayed wheat fields. In addition to P.graminis-tritici (Pygt),we also evaluated the levels of sensitivity of three other grass-associated blast pathogens, which included P. grisea (Pg), P. pennisetigena (Pp), andP. urashimae(Pu).Resistance to the triazole fungicides tebuconazole and... |
| Tipo: Artigo de periódico |
Palavras-chave: CYP51A gene; Sterol demethylation inhibitor (DMI) fungicides; Epoxiconazole; Pyricularia species; Pyricularia graminis-tritici (Pygt); P Graminis-tritici; Blast pathogens; Pyricularia oryzae(Po); Pyricularia urashimae (Pu); Pyricularia pennisetigena (Pp); Pyricularia grisea (Pg); Pyricularia Grisea; Triticum Aestivum; Blast disease; Tebuconazole; Triazole fungicides. |
| Ano: 2019 |
URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1121059 |
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| Registros recuperados: 31 | |
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