EFFECTS OF FOREST FRAGMENTATION ON NATURAL POPULATIONS OF Anadenanthera colubrina (Vell.) Brenan: INSIGHTS FOR CONSERVATION AND SUSTAINABLE MANAGEMENT

• Autor(a) principal: Araújo da Silva , Karla Daniele
• Data de Publicação: 2024
• Outros Autores: Silva Júnior, Adelson Lemes da, Cruz de Souza, Mariana, Cruz de Souza, Lucimara, Demolinari de Miranda , Fábio, Winckler Caldeira , Marcos Vinicius, Azevedo , Cássia dos Santos, Bastos Soares , Taís Cristina
• Tipo de documento: Artigo
• Idioma: eng
• Título da fonte: Cerne (Online)
• Texto Completo: https://cerne.ufla.br/site/index.php/CERNE/article/view/3316
• topic: genetic diversity; genetic structure; forest fragments; molecular markers; tree species

Background: The objective of this study is to characterize the diversity and genetic structure of A.colubrina in three Atlantic Forest fragments in the south of Espírito Santo state, using Inter SimpleSequence Repeats (ISSR) molecular markers. Genomic DNA from 85 trees was analyzed using 12ISSR primers, generating 147 fragments, of which 109 were polymorphic (74%). Markers werecharacterized as moderately informative, with a mean polymorphic informational content of 0.34.Results: Low genetic diversity was found for the three fragments and in the total sample, based onNei’s diversity parameters (H* = 0.26) and Shannon’s index (I* = 0.38). In the dissimilarity analysis,four groups were observed in the dendrogram with an exclusive clustering trend by location.The analysis of molecular variance confirmed that most of the genetic variation is found withinpopulations (73.50%), however, with high genetic differentiation between them (ΦST = 0.26). Thisresult was supported by the Bayesian approach that indicated genetically structured populations.Conclusion: The data obtained reveal that forest fragmentation affected the diversity and geneticstructure of A. colubrina and allow expanding knowledge for the development of effective strategiesfor the conservation and management of the species.