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dc.contributor.authorTERRA, T. G. R.
dc.contributor.authorLEAL, T. C. A. de B.
dc.contributor.authorRANGEL, P. H. N.
dc.contributor.authorBORÉM, A.
dc.date.accessioned2018-01-26T23:49:54Z-
dc.date.available2018-01-26T23:49:54Z-
dc.date.created2018-01-26
dc.date.issued2017
dc.identifier.citationBioscience Journal, Uberlândia, v. 33, n. 6, p. 1474-1484, Nov./Dec. 2017.
dc.identifier.urihttp://www.alice.cnptia.embrapa.br/alice/handle/doc/1086481-
dc.descriptionThe purpose of this study was to estimate the phenotypic correlations between 14 traits obtainedin a thematic core collection of upland rice for drought tolerance and partition them into direct and indirect effects by path analysis. Two experiments were carried out (with and without water stress). One hundred samples were evaluated in a triple 10x10 lattice design. The plot was formed by four rows, 3.0 metres long, spaced at 0.35 m. The plot useful area was constituted by two central rows of 2.0 m in length, totalling 1.4 m2, where data from 14 traits were collected, five from the root system and nine from the aerial part of the plant. Of the evaluated traits, spikelet sterility was the main grain yield determinant, presenting relevant negative correlations of -0.77 and -0.59 in environments with and without drought stress, respectively. The partitioning of spikelet sterility correlations presented negative direct effects on grain yield in environments with (-0.60) and without (-0.62) water stress, corroborating the negative correlations between these traits. The obtained data confirmed that spikelet sterility is an important variable for the selection of rice strain submitted to water deficit. Partial correlation coefficients indicated that only 70.33% in the environment with stress and 50.30% in the environment without stress of grain yield variation were phenotypically explained by variables considered in path analysis, thereby showing the complexity of the selection for drought-tolerant rice.
dc.language.isoengeng
dc.rightsopenAccesseng
dc.titlePhenotypic correlation and path analysis in cultivars and strains of upland rice for drought tolerance.
dc.typeArtigo de periódico
dc.date.updated2018-01-26T23:49:54Zpt_BR
dc.subject.thesagroArroz
dc.subject.thesagroOryza sativa
dc.subject.thesagroMelhoramento genético vegetal
dc.subject.thesagroResistência a seca
dc.subject.nalthesaurusRice
dc.subject.nalthesaurusDrought tolerance
dc.subject.nalthesaurusRoots
riaa.ainfo.id1086481
riaa.ainfo.lastupdate2018-01-26
dc.contributor.institutionTHIAGO GLEDSON RIOS TERRA, UNIVERSIDADE FEDERAL DO TOCANTINS; TARCISIO CASTRO ALVES DE BARROS LEAL, UNIVERSIDADE FEDERAL DO TOCANTINS; PAULO HIDEO NAKANO RANGEL, CNPAF; ALUÍZIO BOREM, UNIVERSIDADE FEDERAL DE VIÇOSA.
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