Mapping QTLs for kernel oil content in a tropical maize population

dc.creatorMangolin, CA
dc.creatorde Souza, CL
dc.creatorGarcia, AAF
dc.creatorGarcia, AF
dc.creatorSibov, ST
dc.creatorde Souza, AP
dc.date2004
dc.dateMAY
dc.date2014-11-19T20:31:30Z
dc.date2015-11-26T17:08:36Z
dc.date2014-11-19T20:31:30Z
dc.date2015-11-26T17:08:36Z
dc.date.accessioned2018-03-28T23:57:15Z
dc.date.available2018-03-28T23:57:15Z
dc.identifierEuphytica. Kluwer Academic Publ, v. 137, n. 2, n. 251, n. 259, 2004.
dc.identifier0014-2336
dc.identifierWOS:000223915300009
dc.identifier10.1023/B:EUPH.0000041588.95689.47
dc.identifierhttp://www.repositorio.unicamp.br/jspui/handle/REPOSIP/53229
dc.identifierhttp://www.repositorio.unicamp.br/handle/REPOSIP/53229
dc.identifierhttp://repositorio.unicamp.br/jspui/handle/REPOSIP/53229
dc.identifier.urihttp://repositorioslatinoamericanos.uchile.cl/handle/2250/1280411
dc.descriptionMaize cultivars often have low kernel oil content. To increase the oil content, efficient maize breeding programs have to be developed, which require the knowledge of the inheritance of this trait. Thus, the objective of this research was to map quantitative trait locus (QTLs) and estimate their effects for kernel oil content in a tropical maize population. Two maize inbred lines, contrasting for kernel oil content, were used to develop an F-2 population. Four hundred and eight F-2 plants were self-pollinated, and their kernels (F-2:3 progenies) were used for kernel oil evaluation. A genetic map with 75 microsatellites was developed, and the QTLs were mapped using the composite interval map (CIM); also, estimates of genetic and phenotypic variances, and heritability coefficient were computed. The map presented 10 linkage groups, spanned 1,438.6 cM in length with an average interval of 19.18 cM between adjacent markers. The kernel oil content averaged 58.40 g kg(-1), and the broad-sense heritability was high (h(2)=0.98). Thirteen QTLs were mapped, which were distributed into eight chromosomes, and explained 26.64% of the genetic variation. QTLs in chromosomes 1, 5, and 6 contributed the most for kernel oil content. Nine out of 13 QTLs with favorable alleles were from the parental inbred with the highest kernel oil content. The average level of dominance was partial, but gene action of the QTLs ranged from additive to overdominance. Eight out of 13 mapped QTLs were already reported for temperate maize populations.
dc.description137
dc.description2
dc.description251
dc.description259
dc.languageen
dc.publisherKluwer Academic Publ
dc.publisherDordrecht
dc.publisherHolanda
dc.relationEuphytica
dc.relationEuphytica
dc.rightsfechado
dc.sourceWeb of Science
dc.subjectcomposite interval mapping
dc.subjectmicrosatellites
dc.subjectmolecular markers
dc.subjectoil content
dc.subjectquantitative trait loci
dc.subjecttropical maize germplasm
dc.subjectZea mays L.
dc.subjectQuantitative Trait Loci
dc.subjectZea-mays L.
dc.subjectMolecular Markers
dc.subjectMap Construction
dc.subjectMultiple Loci
dc.subjectSelection
dc.subjectHeritability
dc.subjectSequences
dc.subjectPrecision
dc.subjectInterval
dc.titleMapping QTLs for kernel oil content in a tropical maize population
dc.typeArtículos de revistas


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