Data/hora: 21/06/2024 14:59:44

Biblioteca(s): | Embrapa Amazônia Oriental; Embrapa Arroz e Feijão; Embrapa Unidades Centrais.
Data corrente: | 09/01/1997
Data da última atualização: | 20/05/2022
Autoria: | PRABHU, A. S.; SOAVE, J.; ZIMMERMANN, F. J. P.; FILIPPI, M. C.; SOUZA, N. R. G.; CURVO, R. C. V.; LOPES, A. M.; SOBRAL, C. A. M.; FERREIRA, R. de P.; KOBAYASHI, T.; GALVÃO, E. U. P.
Afiliação: | ANNE SITARAMA PRABHU, CNPAF; JACIRO SOAVE, IAC; FRANCISCO JOSE P ZIMMERMANN, CNPAF; MARTA CRISTINA CORSI DE FILIPPI, CNPAF; NARA R. G. SOUZA, EMPAER; ROSANA C. V. CURVO, EMPAER; ALTERVIR DE MATOS LOPES, CPATU; CESAR A. M. SOBRAL, CPAF-RO; REINALDO DE PAULA FERREIRA, CNPAF; T. KOBAYASHI, CPAC; EXPEDITO U. P. GALVÃO, CPAF-AM.
Título: | Genetic variability for disease resistance in Brazilian upland rice native germplasm.
Ano de publicação: | 1996
Fonte/Imprenta: | Pesquisa Agropecuária Brasileira, v. 31, n. 6, p. 413-424, jun. 1996.

Idioma:

Inglês
Português

Conteúdo: | Thirty nine rice genotypes were evaluated under dryland field conditions for resistance to leaf and neck blast, brown spot, leaf scald, narrow brown leaf spot and grain discolaration in 13 test sites during a three-year period. these include 17 land races, six traditional cultivars, 11 improved breeding lines and three exotic cultivars. There was a great diversity in the native germplasm in relation to resistance to different patogens. The land races Iguape Redondo, Arroz de Guerra, Cateto and Chatao exhibited partial resistance to leaf blast comparable to IRAT 13 and IRAT 104 and superior to the traditional cultivar IAC 47. The leaf blast se verities and neck blast incidences of medium maturing genotypes were positively correlated (r=0.86,P<0.01). A number of gentoypes exhibited a high degree of resistance to grain discolaration relative to the susceptible controls, Vermelho miudo, Mimoso and Cajueiro Liso. The correlation between mean brown leaf spot and mean grain discolaration severities of different trials was positive both for early maturing (r=0.93, P<0.01) and medium maturing (r=0.77, P<0.01) genotypes. The early maturing improved line M 39 had shown a high level of multiple disease resistance. The localities Goiania (GO) and Jaciara (MT) were identified as hot spot screening sites for rice blast and grain discolaration, respectively.
Palavras-Chave: | Diversidade genetica; Drechslera oryzae; Genétic diversity; Gerlachia oryzae; Partial resistance; Resistencia parcial.
Thesagro: | Cercospora Oryzae; Pyricularia Grisea; Pyricularia Oryzae.

Categoria do assunto:

--
H Saúde e Patologia

URL: | http://ainfo.cnptia.embrapa.br/digital/bitstream/AI-SEDE/19300/1/pab96_06_05.pdf
Registro original: | Embrapa Arroz e Feijão (CNPAF)

Exemplares:

AI-SEDE - (19300-1) - UPE - AP - PP - 630.72081 - P474 -  - DIS
CNPAF - (23341-1) - UPC - AP - DD - 1996 -  - 1996 - DIS
CPATU - (56519-1) - UPC - AP - PP - 630.5 - P472 -  - DIS