Use of genomic and phenotypic selection in lines for prediction of testcrosses in maize II: grain yield and plant traits

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dc.contributor.authorMôro, Gustavo Vitti [UNESP]
dc.contributor.authorSantos, Mateus Figueiredo
dc.contributor.authorde Souza, Cláudio Lopes
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.contributor.institutionEmpresa Brasileira de Pesquisa Agropecuária (EMBRAPA)
dc.contributor.institutionUniversidade de São Paulo (USP)
dc.date.accessioned2018-12-11T17:32:42Z
dc.date.available2018-12-11T17:32:42Z
dc.date.issued2017-06-01
dc.description.abstractPlant breeders have been trying to predict the performance of hybrids based on their parental performance. One application of molecular markers is its use in selection. The objectives were to map quantitative trait loci (QTL) and verify its congruence in maize lines and in their testcrosses and verify the possibility to select testcrosses from the predicted means of the lines by using information from markers. Two-hundred and fifty six lines and the testcrosses of these lines with two testers were evaluated in six environments, considering grain yield, plant lodging, days to anthesis and silking, anthesis-silking interval, plant and ear height and ear placement. QTL were mapped in the lines and in testcrosses and the predicted means of the lines were computed based on QTL effects and in all markers of the genome. The congruence of QTL detected in the lines and testcrosses were small for all traits. The correlations between the predicted means of the lines and the phenotypic means of the testcrosses ranged from low for grain yield to moderate for cycle and stature traits. The highest coincidences of the lines and selected testcrosses were observed for cycle and stature traits and the lowest for grain yield. Even by using molecular markers information, it is only possible to predict the testcrosses performance from the lines information to less complex traits and with reduced dominance effect. For complex traits and with pronounced dominance effect, information of markers must be obtained directly in the testcrosses, so they can be used for selection.en
dc.description.affiliationDepartment of Plant Production School of Agricultural and Veterinarian Sciences São Paulo State University (Unesp)
dc.description.affiliationEmbrapa Beef Cattle Plant Production Group
dc.description.affiliationDepartment of Genetics University of São Paulo, P.O. Box 83
dc.description.affiliationUnespDepartment of Plant Production School of Agricultural and Veterinarian Sciences São Paulo State University (Unesp)
dc.description.sponsorshipConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
dc.description.sponsorshipIdCNPq: CNPq-140964/2006-1
dc.identifierhttp://dx.doi.org/10.1007/s10681-017-1915-3
dc.identifier.citationEuphytica, v. 213, n. 6, 2017.
dc.identifier.doi10.1007/s10681-017-1915-3
dc.identifier.file2-s2.0-85020028187.pdf
dc.identifier.issn1573-5060
dc.identifier.issn0014-2336
dc.identifier.scopus2-s2.0-85020028187
dc.identifier.urihttp://hdl.handle.net/11449/178916
dc.language.isoeng
dc.relation.ispartofEuphytica
dc.relation.ispartofsjr0,742
dc.relation.ispartofsjr0,742
dc.rights.accessRightsAcesso aberto
dc.sourceScopus
dc.subjectCorrelation
dc.subjectEndogamy
dc.subjectHybrids
dc.subjectMarker assisted selection
dc.subjectQTL
dc.subjectTropical maize
dc.titleUse of genomic and phenotypic selection in lines for prediction of testcrosses in maize II: grain yield and plant traitsen
dc.typeArtigo

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