Mapping QTLs for aluminum tolerance in maize

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dc.contributor.authorNinamango-Cardenas, F. E.
dc.contributor.authorGuimaraes, C. T.
dc.contributor.authorMartins, P. R.
dc.contributor.authorParentoni, S. N.
dc.contributor.authorCarneiro, N. P.
dc.contributor.authorLopes, M. A.
dc.contributor.authorMoro, JR
dc.contributor.authorPaiva, E.
dc.contributor.institutionEmpresa Brasileira de Pesquisa Agropecuária (EMBRAPA)
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.contributor.institutionUniversidade de São Paulo (USP)
dc.date.accessioned2014-05-20T15:24:38Z
dc.date.available2014-05-20T15:24:38Z
dc.date.issued2003-01-01
dc.description.abstractAluminum toxicity is one of the major constraints for plant development in acid soils, limiting food production in many countries. Cultivars genetically adapted to acid soils may offer an environmental compatible solution, providing a sustainable agriculture system. The aim of this work was to identify genomic regions associated with Al tolerance in maize, and to quantify the genetic effects on the phenotypic variation. A population of 168 F-3:4 families derived from a cross between two contrasting maize inbred lines for Al tolerance was evaluated using the NSRL and RSRL parameters in nutrient solution containing toxic level of aluminum. Variance analyses indicated that the NSRL was the most reliable phenotypic index to measure Al tolerance in the population, being used for further QTL mapping analysis. RFLP and SSR markers were selected for bulked segregant analysis, and additional SSR markers, flanking the polymorphisms of interest, were chosen in order to saturate the putative target regions. Seven linkage groups were constructed using 17 RFLP and 34 SSR markers. Five QTLs were mapped on chromosomes 2, 6 and 8, explaining 60% of the phenotypic variation. QTL(4) and marker umc043 were located on chromosomes 8 and 5, close to genes encoding for enzymes involved in the organic acids synthesis pathways, a widely proposed mechanism for Al tolerance in plants. QTL(2) was mapped in the same region as Alm2, also associated with Al tolerance in maize. In addition, dominant and additive effects were important in the control of this trait in maize.en
dc.description.affiliationEMBRAPA Maize & Sorghum, BR-35701970 Sete Lagoas, MG, Brazil
dc.description.affiliationSão Paulo State Univ, Coll Agr & Vet, Dept Appl Biol, BR-14870000 Jaboticabal, SP, Brazil
dc.description.affiliationUniv São Paulo, Coll Agr Luiz de Queiroz, Dept Genet, BR-13400970 Piracicaba, SP, Brazil
dc.description.affiliationUnespSão Paulo State Univ, Coll Agr & Vet, Dept Appl Biol, BR-14870000 Jaboticabal, SP, Brazil
dc.format.extent223-232
dc.identifierhttp://dx.doi.org/10.1023/A:1022867416513
dc.identifier.citationEuphytica. Dordrecht: Kluwer Academic Publ, v. 130, n. 2, p. 223-232, 2003.
dc.identifier.doi10.1023/A:1022867416513
dc.identifier.issn0014-2336
dc.identifier.urihttp://hdl.handle.net/11449/35207
dc.identifier.wosWOS:000181688500010
dc.language.isoeng
dc.publisherKluwer Academic Publ
dc.relation.ispartofEuphytica
dc.relation.ispartofjcr1.546
dc.relation.ispartofsjr0,742
dc.rights.accessRightsAcesso restrito
dc.sourceWeb of Science
dc.subjectaluminum tolerancept
dc.subjectlinkage mappt
dc.subjectmaizept
dc.subjectquantitative trait locipt
dc.subjectRFLPpt
dc.subjectSSRpt
dc.titleMapping QTLs for aluminum tolerance in maizeen
dc.typeArtigo
dcterms.licensehttp://www.springer.com/open+access/authors+rights
dcterms.rightsHolderKluwer Academic Publ
unesp.campusUniversidade Estadual Paulista (Unesp), Faculdade de Ciências Agrárias e Veterinárias, Jaboticabalpt

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Artigos - Biologia - FCAV