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      Agronomic performance of super-sweet corn genotypes in the north of Rio de Janeiro Translated title: Desempenho agronômico de genótipos de milho super-doce na região norte fluminense

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          Abstract

          We investigated the agronomic performance of super-sweet corn genotypes. Super-sweet corn genotypes were backcrossed with regionally adapted field varieties (CIMMYT 8 and Piranão 8). Eight morphological and yield-related traits were evaluated. A significant effect of interaction was observed between the five groups of genotypes (donor parents; super-sweet backcrossed parents; super-sweet intervarietal hybrids; common intervarietal corn hybrids; and field corn populations). Despite the low yield of genotype SH2Piranão, the hybrids resulting from interbreeding of the backcrossed parents for the improvement of super-sweet corn were promising. The agronomic performance of the super-sweet parents and their hybrids indicates the possibility of breeding lines with high genetic value to obtain single-cross hybrids and cultivars of super-sweet corn adapted to the northern region of the State of Rio de Janeiro.

          Translated abstract

          Investigou-se o desempenho agronômico de genótipos de milho super-doce na região Norte Fluminense. Genótipos de milho super-doce foram retrocruzados com variedades de milho comum adaptadas a região (CIMMYT 8 e Piranão 8). Avaliaram-se oito características relacionadas à caracteres morfoagronômicos e rendimento de grãos. Houve efeito significativo de interação entre os cinco grupos de genótipos avaliados (Genitores Doadores, Parentais retrocruzados super-doce, Híbridos super-doce, híbridos de milho comum e populações de milho comum). A despeito do genótipo SH2 Piranão expressar baixo rendimento, os híbridos resultantes do intercruzamento entre os parentais retrocruzados se mostraram promissores no melhoramento do milho super-doce. O desempenho agronômico dos parentais super-doce e seus híbridos denota possibilidade de extração de linhagens com alto valor genético para obtenção de híbridos simples, bem como de cultivares de milho super-doce adaptadas a região Norte Fluminense.

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          Most cited references19

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          SAS/STAT User's guide

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            Precisão e controle da qualidade em experimentos de avaliação de cultivares

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              Seleção de genótipos de milho mais promissores para o consumoin natura

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                Author and article information

                Contributors
                Role: ND
                Role: ND
                Role: ND
                Role: ND
                Role: ND
                Role: ND
                Journal
                cbab
                Crop Breeding and Applied Biotechnology
                Crop Breed. Appl. Biotechnol.
                Crop Breeding and Applied Biotechnology (Viçosa )
                1984-7033
                March 2014
                : 14
                : 1
                : 8-14
                Affiliations
                [1 ] Universidade Estadual do Norte Fluminense Brazil
                [2 ] Embrapa Milho e Sorgo Brazil
                Article
                S1984-70332014000100002
                10.1590/S1984-70332014000100002
                3f72793c-07ef-4ee3-82b4-05abca275891

                http://creativecommons.org/licenses/by/4.0/

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                SciELO Brazil

                Self URI (journal page): http://www.scielo.br/scielo.php?script=sci_serial&pid=1984-7033&lng=en
                Categories
                AGRONOMY
                BIOTECHNOLOGY & APPLIED MICROBIOLOGY

                Biotechnology,Horticulture
                super-sweet corn,intervarietal hybrids,Zea mays,yield,milho super-doce,híbridos intervarietais,heterose,produtividade,heterosis

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