Molecular Philogeography of Cacauhy (Theobroma speciosum) in the Brazilian Amazon/ Filogeografia molecular de cacauí (Theobroma speciosum) na Amazônia brasileira

• Autor(a) principal: Dardengo, Juliana de Freitas Encinas
• Data de Publicação: 2020
• Outros Autores: Rodrigues, Alex Souza, Oliveira, Uéliton Alves de, Lima, Joameson Antunes, Garcia, Magali Gonçalves, Silva, Carolina Joana da, Oliveira, Luis Orlando de, Rossi, Ana Aparecida Bandini
• Tipo de documento: Artigo
• Idioma: eng
• Título da fonte: Revista Veras
• Texto Completo: https://ojs.brazilianjournals.com.br/ojs/index.php/BRJD/article/view/21793
• topic: conservation; diversity; Biogeography.

This study aims to determine the phylogeographic patterns in natural populations of Theobroma speciosum through the analysis of cpDNA and ITS sequence polymorphisms. We sampled individuals of T. speciosum distributed in 13 populations in the Brazilian Amazon to obtain data of DNA sequences of the chloroplastidic and nuclear genomes. The DNAsp program was used to estimate the number of haplotypes, haplotypic diversity, nucleotide diversity, and number of polymorphic sites. The values of genetic diversity estimated for populations from cpDNA present low values of haplotype and nucleotide diversity. In contrast, for the nuclear region, high values of haplotype and nucleotide diversity were found (except for three populations). The phylogeographic analyses based on the chloroplastidic and nuclear genome of T. speciosum evidenced the existence of 07 haplotypes for the cpDNA and 36 for the ITS, denoting a haplotype sharing, which means that T. speciosum does not present a pronounced but a generalist phylogeographic structure.