Genetic variability for disease resistance in Brazilian upland rice native germplasm.

dc.contributorANNE 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.
dc.creatorPRABHU, A. S.
dc.creatorSOAVE, J.
dc.creatorZIMMERMANN, F. J. P.
dc.creatorFILIPPI, M. C.
dc.creatorSOUZA, N. R. G.
dc.creatorCURVO, R. C. V.
dc.creatorLOPES, A. M.
dc.creatorSOBRAL, C. A. M.
dc.creatorFERREIRA, R. P.
dc.creatorKOBAYASHI, T.
dc.creatorGALVÃO, E. U. P.
dc.date1996
dc.date2006-03-06
dc.date.accessioned2017-03-06T19:32:36Z
dc.date.available2017-03-06T19:32:36Z
dc.identifier23341
dc.identifierhttp://www.alice.cnptia.embrapa.br/handle/doc/213882
dc.identifier.urihttp://repositorioslatinoamericanos.uchile.cl/handle/2250/268374
dc.descriptionThirty 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.
dc.description1996
dc.languagept_BR
dc.publisherPesquisa Agropecuária Brasileira, Brasília, DF, v. 31, n. 6, p. 413-424, jun. 1996.
dc.relationEmbrapa Arroz e Feijão - Artigo em periódico indexado (ALICE)
dc.subjectPyricularia grisea
dc.subjectPyricularia oryzae
dc.subjectDrechslera oryzae
dc.subjectGerlachia oryzae
dc.subjectCercospora oryzae
dc.subjectGenetic diversity
dc.subjectPartial resistance
dc.subjectDiversidade genética
dc.subjectResistência parcial
dc.titleGenetic variability for disease resistance in Brazilian upland rice native germplasm.
dc.typeArtículos de revistas


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