The objective of this work was to estimate the repeatability coefficients of mangaba (Hancornia speciosa) fruit traits, in order to define the number of fruit needed for an accurate selection of superior genotypes, as well as to conjecture about the nature of the phenotypic variation of these traits. Evaluations were performed for 160 fruit of 16 genotypes from two native H. speciosa populations of Goiás Velho and Padre Bernardo, in the state of Goiás, Brazil. Repeatability was estimated by the analysis of variance, principal component analyses based on covariance and on the correlation matrix, and structural analysis based on the correlation matrix. Repeatability estimates for fruit weight, diameter, and length, as well as seed number and weight, were of low magnitude, from 0.02 to 0.62, indicating low heritability. Repeatability estimates for ºBrix, titratable acidity, and ºBrix/acidity ratio were higher, from 0.34 to 0.91, indicating a low to potentially moderate heritability. The number of fruit for an effective selection of the best genotypes for titratable acidity, ºBrix, ºBrix/acidity ratio, and fruit weight is four for a 0.85 accuracy level. However, seven fruit would allow 0.90 accuracy for the same traits, and 0.85 accuracy for fruit length and diameter. The number and weight of seed per fruit are not effective for predicting the real value of a genotype.
O baruzeiro possui um grande potencial socioeconômico, porém a maioria dos indivíduos dessa planta encontra-se na natureza em forma selvagem e a coleta dos frutos é realizada de maneira extrativista. Plantios cultivados do baruzeiro são formados por mudas oriundas de sementes, entretanto, por ser predominantemente alógama, os indivíduos apresentam grande variabilidade genética. Neste caso, a propagação vegetativa torna-se uma boa estratégia e uma ferramenta importante para domesticação da espécie. Este trabalho tem como objetivo avaliar métodos de enxertia na produção de mudas de baruzeiro. Foram testados três tipos de enxertia (borbulhia de placa, garfagem à inglês simples e fenda cheia) em três sistemas de condução de mudas de porta-enxertos, em delineamento inteiramente casualizado. As mudas foram formadas por meio de sementes, e antes da enxertia ser realizada, foi avaliado o crescimento das mudas, que foram enxertadas quando os porta-enxertos atingiram diâmetro médio de caule ≥ a 1,0 cm. As médias de crescimento das mudas foram comparadas pelo teste de Tukey e os tipos de enxertia, pelo teste não paramétrico qui-quadrado. Os resultados evidenciaram que os três tipos de enxertias e a garfagem em fenda cheia mostraram-se adequados para mudas conduzidas a pleno sol e sob sombrite, respectivamente. O sistema de formação de mudas em sacos plásticos, conduzidas a pleno sol, permite médias de pegamento de enxertia superiores a 50%.
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