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

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.creatorGALVAO, E.U.P.
dc.date2011-04-09T12:06:17Z
dc.date2011-04-09T12:06:17Z
dc.date1996
dc.date1997-01-09
dc.date.accessioned2017-03-06T19:24:07Z
dc.date.available2017-03-06T19:24:07Z
dc.identifier19300
dc.identifierhttp://www.alice.cnptia.embrapa.br/handle/doc/104099
dc.identifier.urihttp://repositorioslatinoamericanos.uchile.cl/handle/2250/264515
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.languageen
dc.publisherPesquisa Agropecuaria Brasileira, Brasilia, v.31, n.6, p.413-424, jun. 1996.
dc.relationÁrea de Informação da Sede - Artigo em periódico indexado (ALICE)
dc.subjectPyricularia grisea
dc.subjectPyricularia oryzae
dc.subjectDrechslera oryzae
dc.subjectGerlachia oryzae
dc.subjectCercospora oryzae
dc.subjectGenétic diversity
dc.subjectPartial resistance
dc.subjectDiversidade genetica
dc.subjectResistencia parcial
dc.titleGenetic variability for disease resistance in Brazilian upland rice native germplasm.
dc.typeArtículos de revistas


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