Data/hora: 21/06/2024 00:54:07

Biblioteca(s): 	Embrapa Arroz e Feijão; Embrapa Recursos Genéticos e Biotecnologia; Embrapa Unidades Centrais.	
Data corrente: 	02/06/2010	
Data da última atualização: 	06/06/2022	
Autoria: 	DIAS NETO, J. J.; SANTOS, G. R. dos; ANJOS, L. M. dos; RANGEL, P. H. N.; FERREIRA, M. E.	
Afiliação: 	JUSTINO JOSÉ DIAS NETO, UNIVERSIDADE FEDERAL DO TOCANTINS; GIL RODRIGUES DOS SANTOS, UNIVERSIDADE FEDERAL DO TOCANTINS; LIAMAR MARIA DOS ANJOS, UNIVERSIDADE FEDERAL DO TOCANTINS; PAULO HIDEO NAKANO RANGEL, CNPAF; MARCIO ELIAS FERREIRA, CENARGEN.	
Título: 	Hot spots for diversity of Magnaporthe oryzae physiological races in irrigated rice fields in Brazil.	
Ano de publicação: 	2010	
Fonte/Imprenta: 	Pesquisa Agropecuária Brasileira, v. 45, n. 3, p. 252-260, mar. 2010.	
Idioma: 	Inglês	
Conteúdo: 	Abstract ? The objective of this work was to evaluate the Magnaporthe oryzae pathotype diversity in new commercial irrigated rice fields in the Araguaia River Valley, state of Tocantins, Brazil. The causal agent of rice blast has heavily affected rice production in the region. Despite the efforts of breeding programs, blast resistance breakdown has been recorded shortly after the release of new resistant cultivars developed for the region. Among the causes of resistance breakage is the capacity of the fungus to rapidly develop new pathotypes. A sample of 479 M. oryzae monosporic isolates was obtained and tested using the international rice blast differential set. Isolate collections were made in small areas designed as trap nurseries and in scattered sites in their vicinity. Analysis of 250 M. oryzae isolates from three trap nurseries indicated the presence of 45 international M. oryzae races belonging to seven pathotype groups (IA-IG). In the isolates tested, 61 M. oryzae pathotypes belonging to all but the IH group were detected. The new areas of irrigated rice in the Araguaia River Valley have the highest diversity of M. oryzae pathotypes reported so far in Brazil.	
Palavras-Chave: 	Pathotype; Patótipo; Race; Tocantins.	
Thesagro: 	Arroz irrigado; Brusone; Oryza sativa; Patogenicidade; Pyricularia oryzae; Raça.	
Thesaurus Nal: 	Magnaporthe oryzae; Pathogenicity; Pyricularia.	
Categoria do assunto: 	--
H Saúde e Patologia	
URL: 	http://ainfo.cnptia.embrapa.br/digital/bitstream/AI-SEDE-2010/48048/1/45n03a04.pdf
http://www.scielo.br/pdf/pab/v45n3/v45n3a04.pdf	
Registro original: 	Embrapa Arroz e Feijão (CNPAF)	
Exemplares: 	CNPAF - (29900-1) - UPC - AP - DD - 2010 -  - 2010 - DIS
AI-SEDE - (48048-1) - UPE - AP - PP - 630.72081 - P474 -  - DIS
CENARGEN - (32794-1) - UPC - AP - PP - 630.5 -  -  - DIS