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      Variações geneticas para características do sistema radicular de mudas de baru (Dipteryx alata Vog.) Translated title: Genetic variation for root system traits baru seedlings (Dipteryx alata Vog.)

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          Abstract

          Este estudo objetivou estimar os parâmetros genéticos relativos à qualidade do sistema radicular de mudas de baru. Para isso, foram utilizadas mudas provenientes de sementes colhidas em 21 árvores-matriz de polinização livre no Município de Capinópolis, Minas Gerais. Quarenta e cinco dias após a germinação, as imagens das raízes de 20 mudas de cada progênie foram obtidas por "scanner" ótico. Na análise de variância, houve variação significativa entre as progênies quanto aos caracteres: comprimento total de raízes, volume de raízes, diâmetro médio e número de raízes finas. As análises indicaram altos valores de herdabilidade e coeficiente de variação genética, indicando que altos ganhos genéticos poderão ser obtidos mediante a seleção de matrizes.

          Translated abstract

          Baru seedlings originated from seeds collected from 21 open-pollinated progenies were used in Capinópolis, Minas Gerais, Brazil, in order to estimate genetic parameters concerning the quality of their root system. Forty-five days after germination, the root images of twenty seedlings of each progeny were obtained using an optical scanner. The analysis of variance showed significant variation among progenies in total root length, root volume, average diameter and the number of fine roots. The analysis showed high heritability and genetic variation, indicating that high genetics gains are possible to be obtained by means of mother-tree selections.

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          Most cited references 9

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          Methods of studying root systems

           W. BÖHM,  W. Bohm (1979)
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            Root Morphology of Contrasting Maize Genotypes

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              Genética biométrica no fitomelhoramento

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                Author and article information

                Journal
                rarv
                Revista Árvore
                Rev. Árvore
                Sociedade de Investigações Florestais (Viçosa, MG, Brazil )
                0100-6762
                1806-9088
                December 2006
                : 30
                : 6
                : 905-909
                Affiliations
                Lavras MG orgnameUniversidade Federal de Lavras orgdiv1Departamento de Ciências Florestais Brasil eacrespo@ 123456uflanet.com.br
                Article
                S0100-67622006000600005 S0100-6762(06)03000605

                This work is licensed under a Creative Commons Attribution 4.0 International License.

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                Figures: 0, Tables: 0, Equations: 0, References: 14, Pages: 5
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