Use este identificador para citar ou linkar para este item: http://www.alice.cnptia.embrapa.br/alice/handle/doc/921132
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dc.contributor.authorLEITE, R. M. V. B. C.pt_BR
dc.contributor.authorOLIVEIRA, M. C. N. dept_BR
dc.date.accessioned2012-03-30T11:11:11Zpt_BR
dc.date.available2012-03-30T11:11:11Zpt_BR
dc.date.available2012-03-30T11:11:11Zpt_BR
dc.date.created2012-03-30pt_BR
dc.date.issued2012pt_BR
dc.identifier.citationIn: INTERNATIONAL SUNFLOWER CONFERENCE, 18., 2012, Mar del Plata & Balcarce. Proceedings... [Mar del Plata]: ISA: ASAGIR, 2012.pt_BR
dc.identifier.urihttp://www.alice.cnptia.embrapa.br/alice/handle/doc/921132pt_BR
dc.descriptionThe objective of this paper was to group sunflower genotypes based on the reaction to Alternaria leaf spot disease, yield and 1000-seed weight, using the multivariate method of Principal Component Analysis (PCA). Forty-nine sunflower genotypes were evaluated on field experiments, in Londrina, state of Parana, Brazil, during 2003/2004, 2004/2005, 2005/2006, 2007/2008 e 2008/2009 growing seasons. Alternaria disease severity, under natural conditions in the field, was evaluated at the R3 growth stage with reference to a diagrammatic scale developed for this disease. After harvesting, yield (kg ha-1) and 1000-seed weight (g) were also evaluated. The method of PCA was useful for grouping sunflower genotypes as a function of the studied variables. Genotypes with desirable agronomic characteristics (high yield and high resistance or tolerance to disease) are placed in the first quadrant. Less productive sunflowers are located in the third quadrant. Since no complete resistance to Alternaria leaf spot has been observed yet on sunflower genotypes, efforts to obtain cultivars with higher level of resistance should be continued.pt_BR
dc.format1 CD-ROM.pt_BR
dc.language.isoengeng
dc.rightsopenAccesseng
dc.titleGrouping sunflower genotypes by reaction to alternaria leaf spot (Alternaria helianthi) and yield.pt_BR
dc.typeArtigo em anais e proceedingspt_BR
dc.date.updated2013-01-30T11:11:11Zpt_BR
dc.subject.thesagroGirassolpt_BR
dc.subject.thesagroDoença de plantapt_BR
dc.subject.thesagroVariedade resistentept_BR
dc.subject.thesagroHelianthus Annuuspt_BR
dc.subject.nalthesaurusDisease resistancept_BR
dc.format.extent24 p.pt_BR
riaa.ainfo.id921132pt_BR
riaa.ainfo.lastupdate2013-01-30pt_BR
dc.contributor.institutionREGINA MARIA VILLAS BOAS DE CAMPOS LEITE, CNPSO; MARIA CRISTINA NEVES DE OLIVEIRA, CNPSO.pt_BR
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