Molecular Mapping In Tropical Maize (zea Mays L.) Using Microsatellite Markers. 2. Quantitative Trait Loci (qtl) For Grain Yield, Plant Height, Ear Height And Grain Moisture.

dc.creatorSibov, Sérgio Tadeu
dc.creatorde Souza, Cláudio Lopes
dc.creatorGarcia, Antonio Augusto Franco
dc.creatorSilva, Adelmo Rezende
dc.creatorGarcia, Alexandre Franco
dc.creatorMangolin, Claudete Aparecida
dc.creatorBenchimol, Luciana Lasry
dc.creatorde Souza, Anete Pereira
dc.date2003
dc.date2015-11-27T12:52:40Z
dc.date2015-11-27T12:52:40Z
dc.date.accessioned2018-03-29T00:58:29Z
dc.date.available2018-03-29T00:58:29Z
dc.identifierHereditas. v. 139, n. 2, p. 107-15, 2003.
dc.identifier0018-0661
dc.identifier10.1111/j.1601-5223.2003.01667.x
dc.identifierhttp://www.ncbi.nlm.nih.gov/pubmed/15061811
dc.identifierhttp://repositorio.unicamp.br/jspui/handle/REPOSIP/195653
dc.identifier15061811
dc.identifier.urihttp://repositorioslatinoamericanos.uchile.cl/handle/2250/1295886
dc.descriptionA previous genetic map containing 117 microsatellite loci and 400 F(2) plants was used for quantitative trait loci (QTL) mapping in tropical maize. QTL were characterized in a population of 400 F(2:3) lines, derived from selfing the F(2) plants, and were evaluated with two replications in five environments. QTL determinations were made from the mean of these five environments. Grain yield (GY), plant height (PH), ear height (EH) and grain moisture (GM) were measured. Variance components for genotypes (G), environments (E) and GxE interaction were highly significant for all traits. Heritability was 0.69 for GY, 0.66 for PH, 0.67 for EH and 0.23 for GM. Using composite interval mapping (CIM), a total of 13 distinct QTLs were identified: four for GY, four for PH and five for EH. No QTL was detected for GM. The QTL explained 32.73 % of the phenotypic variance of GY, 24.76 % of PH and 20.91 % of EH. The 13 QTLs displayed mostly partial dominance or overdominance gene action and mapped to chromosomes 1, 2, 7, 8 and 9. Most QTL alleles conferring high values for the traits came from line L-14-4B. Mapping analysis identified genomic regions associated with two or more traits in a manner that was consistent with correlation among traits, supporting either pleiotropy or tight linkage among QTL. The low number of QTLs found, can be due to the great variation that exists among tropical environments.
dc.description139
dc.description107-15
dc.languageeng
dc.relationHereditas
dc.relationHereditas
dc.rightsaberto
dc.rights
dc.sourcePubMed
dc.subjectMicrosatellite Repeats
dc.subjectQuantitative Trait Loci
dc.subjectWater
dc.subjectZea Mays
dc.titleMolecular Mapping In Tropical Maize (zea Mays L.) Using Microsatellite Markers. 2. Quantitative Trait Loci (qtl) For Grain Yield, Plant Height, Ear Height And Grain Moisture.
dc.typeArtículos de revistas


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