Triticale and Barley: New Hosts of Magnaporthe Grisea in São Paulo, Brazil — Relationship with Blast of Rice and Wheat

Urashima, Alfredo Seiiti; Martins, Thais Dias; Bueno, Cassiara R. N. C.; Favaro, D. B.; Arruda, M. A.; Mehta, Y. R.

doi:10.1007/978-0-306-48582-4_30

Cited by 23 publications

(20 citation statements)

References 7 publications

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“…These results indicate the presence of high pathogenic variability among the P. grisea isolates from black oats. P. grisea as a very variable pathogen was also reported earlier (Mehta, 1993;Valent & Chumley, 1991;Urashima et al, 1994a;Urashima et al, 2004b). In Exp.…”

Section: Resultssupporting

confidence: 78%

Pyricularia blast on white oats: a new threat to wheat cultivation

Marangoni

Nunes

Fonseca

et al. 2013

Trop. plant pathol.

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A newly emerged disease, the Pyricularia blast caused by Pyricularia grisea, is commonly observed on wheat and black oats, since its discovery in 1985. Within a few years the disease spread to other species of Gramineae, but white oat cultivars remained resistant and were the only ones among cultivated cereals resistant to this disease. In 2012, one commercial field of white oat cultivar IAC 7 was found severely attacked by Pyricularia blast in Assis, in the state of São Paulo. The objective of the present investigation was to find out whether other white oat cultivars are also susceptible to the new P. grisea isolate from cv. IAC 7 and to determine the pathogenic variability, if any, among P. grisea isolates from black oats. Thirty-three white oat cultivars, along with some cultivars of black oat, barley, wheat, triticale, and rye were evaluated against the IAC 7 isolate. Results of disease severity analysis indicated that four white oat cultivars were resistant, seven were moderately resistant and the remaining were susceptible or highly susceptible. Five wheat cultivars were also resistant. Pathogenic variation among P. grisea isolates from black oats was observed.

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Section: Resultssupporting

confidence: 78%

Pyricularia blast on white oats: a new threat to wheat cultivation

Marangoni

Nunes

Fonseca

et al. 2013

Trop. plant pathol.

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“…A diferenciação genética entre isolados de arroz e trigo já está bem documentada (22,24), mas estudos mais detalhados sobre a relação entre isolados de trigo e cevada são necessários, visto que Urashima et al (20) observaram similaridade genética entre alguns isolados desses dois cereais.…”

Section: Resultsunclassified

Caracterização, compatibilidade e ocorrência de reprodução sexual entre isolados de Pyricularia grisea de diferentes hospedeiros

Galbieri

Urashima

2008

Summa phytopathol.

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A brusone, causada por Pyricularia grisea (teleomorfa Magnaphorthe grisea), possui uma ampla gama de hospedeiros. No Brasil, arroz, trigo, triticale e cevada são as culturas que sofrem quedas significativas de produtividade devido ao ataque desse patógeno. Além desses cereais, outras gramíneas também têm apresentado sintomas dessa doença. Os objetivos dessa pesquisa foram: a) caracterizar sexualmente isolados de P. grisea desses hospedeiros baseado na determinação do "mating type", fertilidade, sexualidade, compatibilidade sexual, b) analisar o grau de compatibilidade sexual entre isolados de brusone de trigo e de outras gramíneas, c) estudar a ocorrência da reprodução sexual em isolados de trigo. Os resultados obtidos através de ensaios "in vitro" constataram: 1) compatibilidade sexual de P. grisea do trigo com Bromus catharticus, Phalaris canariensis e X. triticosecal; 2) desbalanço entre porcentagem de MAT1-1 e MAT1-2, com predominância de MAT1-1 na população de P. grisea do trigo; 3) existência de um campo de isolados de trigo com baixa habilidade de cruzamento; 4) baixa possibilidade de ocorrência de reprodução sexual de P. grisea em campos de trigo, mesmo com existência de ambos "mating type" num mesmo campo.

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“…Triticale (Secale X triticum) and barley (Hordeum vulgare) have also been reported to be infected by M. grisea (Urashimae et al, 2004). Cross infectivity studies among hosts revealed that blast pathogen from triticale and barley could infect triticale, barley, wheat, oat and rye but not rice, sorghum, maize, common millet, sugarcane and Brachiaria brizantha (Urishama et al, 2004). Ever since its detection in 1985, blast had been observed only on wheat and black oats in Brazil.…”

Section: Pathogen Disease Development and Host Variationmentioning

confidence: 99%

Wheat blast research: Status and imperatives

Sharma¹

2017

Afr. J. Agric. Res.

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Wheat blast is relatively a new disease of wheat that first appeared in Brazil in 1985. It did spread to some other neighbouring countries in the following years and owing to its predisposing factors, was feared to be capable of moving across continental boundaries. The disease has now been reported from Bangladesh. Wheat blast at best can be described as poorly understood as both pathogen and its pathogenicity as well as host and its ability to resist need to be investigated before breeders could confidently field varieties with sufficient levels of genetic resistance. In the meantime, chemical protectants and management strategies need to be worked out to tackle this menace that has already been impoertant in rice.

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Triticale and Barley: New Hosts of Magnaporthe Grisea in São Paulo, Brazil — Relationship with Blast of Rice and Wheat

Cited by 23 publications

References 7 publications

Pyricularia blast on white oats: a new threat to wheat cultivation

Pyricularia blast on white oats: a new threat to wheat cultivation

Caracterização, compatibilidade e ocorrência de reprodução sexual entre isolados de Pyricularia grisea de diferentes hospedeiros

Wheat blast research: Status and imperatives

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