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      Seed quality parameters of three interspecific hybrids of elephant grass x pearl millet Translated title: Parâmetros de qualidade de sementes de três híbridos interespecíficos de capim elefante x milheto

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          Abstract

          An interspecific hybrid resulting from the crossing of elephant grass (Pennisetum purpureum Schumach) x pearl millet (Pennisetum glaucum (L.) R. Brown) has been developed. This hybrid, however, revealed low phenotypic uniformity and low production of pure seeds. Through recurrent selection, two improved populations were obtained (genotypes Corte and Pastoreio). The aim of this study was assessing seed quality of the three hybrids (genotypes Corte, Pastoreio and Paraiso) by tests of: seed purity; seed germination; accelerated aging test, at 42 ºC; 1,000 seeds weight; drying curves; and sorption and desorption isotherms. Recurrent selection altered the seed size and increased initial quality of population for genotype Pastoreio. Drying curves for the three hybrids have shown similar behavior and reached moisture contents of 2.1%, 1.9%, and 1.8%, respectively, after 63 days. The accelerated aging test showed that hybrid Pastoreio was the most vigorous.

          Translated abstract

          Foi desenvolvido um híbrido interespecífico resultante do cruzamento de capim- elefante (Pennisetum purpureum Schumach) x milheto (Pennisetum glaucum (L.) R. Brown) que revelou baixa uniformidade fenotípica e baixa produção de sementes puras. Através de seleção recorrente, foram obtidas duas populações melhoradas (genótipos: Corte e Pastoreio). O objetivo deste estudo foi avaliar a qualidade das sementes dos três híbridos (genótipos Corte, Paraíso e Pastoreio) por meio de testes de: pureza, germinação, envelhecimento acelerado, a 42 ºC; peso de 1.000 sementes; curvas de secagem; e isotermas de sorção e desorção. A seleção recorrente alterou o tamanho das sementes e aumentou a qualidade inicial da população para o genótipo Pastoreio. As curvas de secagem para os três híbridos mostraram comportamentos semelhantes e atingiram graus de umidade de 2,1%, 1,9% e 1,8% após 63 dias, respectivamente. O teste de envelhecimento acelerado mostrou que o híbrido Pastoreio foi o mais vigoroso.

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          Most cited references11

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          Regras para análise de sementes

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            International rules for seed testing

            (1996)
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              Physical Properties of plants and Animals Material

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                Author and article information

                Contributors
                Role: ND
                Role: ND
                Journal
                rbs
                Revista Brasileira de Sementes
                Rev. bras. sementes
                Associação Brasileira de Tecnologia de Sementes (Londrina )
                0101-3122
                2012
                : 34
                : 3
                : 382-387
                Affiliations
                [1 ] Universidade Estadual de Campinas Brazil
                [2 ] Coordenadoria de Defesa Agropecuária Brasil
                Article
                S0101-31222012000300004
                10.1590/S0101-31222012000300004
                22cb1f30-2934-4167-b105-5e1fc2e572a7

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

                History
                Product

                SciELO Brazil

                Self URI (journal page): http://www.scielo.br/scielo.php?script=sci_serial&pid=0101-3122&lng=en
                Categories
                PLANT SCIENCES

                Plant science & Botany
                Pennisetum purpureum,Pennisetum glaucum,drying,viability,secagem,viabilidade
                Plant science & Botany
                Pennisetum purpureum, Pennisetum glaucum, drying, viability, secagem, viabilidade

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