Publications by authors named "Sarah Gomes de Oliveira"

The species , , and have great economic value due to the use of their fruits for human consumption. In this study, we compared the repetitive genome fractions of these three species. The compositions of the repetitive DNA of these three species' genomes were analyzed using clustering and identification of the repetitive sequences with RepeatExplorer.

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Article Synopsis
  • - The study focused on Passiflora edulis, a plant with significant agricultural importance, using advanced genomics techniques to analyze its repetitive DNA elements and their roles in genome evolution.
  • - Researchers identified three clusters of satellite DNAs and seven clusters of Long Terminal Repeat (LTR) retrotransposons, mapping their locations on chromosomes, revealing insights into their distribution and significance.
  • - Findings indicated that P. edulis has a complex, repetitive genome, particularly rich in Ty3/Gypsy LTR retrotransposons, which could serve as valuable genetic markers for studying evolutionary relationships within the Passiflora species.
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Background: To contribute to the knowledge of coleopteran cytogenetics, especially with respect to the genomic content of B chromosomes, we analyzed the composition and organization of repetitive DNA sequences in the Coprophanaeus cyanescens karyotype. We used conventional staining and the application of fluorescence in situ hybridization (FISH) mapping using as probes C0t-1 DNA fraction, the 18S and 5S rRNA genes, and the LOA-like non-LTR transposable element (TE).

Results: The conventional analysis detected 3 individuals (among 50 analyzed) carrying one small metacentric and mitotically unstable B chromosome.

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The Coleopterans of Scarabaeinae clade presents Coprophanaeus (Megaphanaeus) ensifer and C. (Coprophanaeus) cyanescens (Scarabaeidae) when they are studied cytogenetically by different techniques. The species present symmetric karyotypes, diploid number of 2n=20, and meta-submetacentric chromosomes.

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The aim of this study was to describe the karyotype of species belonging to the subfamily Scarabaeinae (Coleoptera, Scarabaeidae) and to compile the conventional cytogenetic data available in the literature for this group. The karyotypes of ten species belonging to the tribes Canthonini, Coprini, Onthophagini and Phanaeini were analyzed by conventional staining. Eight of these species were described for the first time (Canthon aff carbonarius, Canthon chalybaeus, Coprophanaeus dardanus, Deltochilum aff amazonicum, Dichotomius geminatus, Oxysternon silenus, Phanaeus chalcomelas and Malagoniella aff astyanax) and two were redescribed (Diabroctis mimas and Digitonthophagus gazella) since their karyotypes differed from those previously published in the literature.

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