A mangaba (Hancornia speciosa Gomes) é uma espécie nativa do Brasil que apresenta importância econômica, social e cultural nas principais áreas onde ocorre. A preocupação com a devastação das áreas naturais da espécie resultou no estabelecimento de um Banco Ativo de Germoplasma, em Sergipe, o principal estado produtor. O objetivo do presente trabalho foi caracterizar a diversidade genética existente nesse BAG, utilizando marcadores RAPD. A utilização de 12 iniciadores de síntese permitiu a obtenção de 106 bandas, sendo 92 delas polimórficas (86,79%). Foram detectados diferentes coeficientes de similaridade, e a média entre eles foi de 0,40 (± 0,04), sendo que a amplitude genética variou entre 0,08 (± 0,04) e 0,60 (± 0,05). Os indivíduos M1 (Pará) e M14 (Bahia) foram os mais diferentes na população, e os pares de indivíduos M9 e M10 (Bahia) foram os mais semelhantes. Três pares de indivíduos foram identificados como mais divergentes (M2, M4 e M14) e indicados para futuros estudos.Palavras-chave: Banco de germoplasma, diversidade, RAPD. Genetic diversity between Hancornia speciosa Gomes varieties ABSTRACTHancornia speciosa Gomes is a native plant of Brazil of great economical, social and cultural importance in their areas of occurrence. The concern with the devastation of the specie natural areas resulted in the establishment of an Active Germplasm Bank in Sergipe, the main producing state. The objective of this work was to characterize the genetic diversity of this Germplasm Bank using RAPD analysis. The use of 12 RAPD primers allowed the production of 106 bands, in which 92 were polymorphic (86.79%). Different similarity coefficients were detected, with means of 0.40 (± 0.04) between them. The genetic amplitude varied between 0.08 (± 0.04) and 0.60 (± 0.05). The M1 (Pará) and M14 (Bahia) individuals were the most different ones within the population, and the individuals pairs M9 and M10 (Bahia) were the most similar ones. Three individuals pairs were identified as the most genetically divergent ones (M2, M4 and M14) and are indicated for future studies.

Genipa americana L. has a diversity of secondary metabolites, including iridoids, phenolic compounds, and alkaloids. Pharmacological and biological properties have also been reported. This study has aimed to evaluate the chemical composition of the essential oil (EO) obtained from the leaves of G. americana and its bioactivity against Aceria guerreronis Keifer (Acari: Eriophyidae), a serious pest of coconut production areas worldwide. EO from the leaves was extracted and analyzed by Gas Chromatography-Mass Spectrometry and flame ionization detection (GC-MS/FID). For the bioassays, the adult coconut mites were subjected to increasing concentrations of EO. The analyses showed a predominance of sesquiterpenes, followed by monoterpenes, aldehydes, and fatty acids. The EO (LC50 = 0.41 mg mL-1; LC90 = 6.43 mg mL-1) showed toxicity and repellent effects against the coconut mite. The tested EO has the potential to develop as a natural product, with acaricidal activities against A. guerreronis, in order to assist in the control of the coconut mite.