SECTION B: LIFE SCIENCES
Rubus niveus is a species that originated in Asia. This plant has spread over several continents due to its anthropogenic uses and biological characteristics. It presents high adaptability which has allowed it to establish in new environments and invade them, as is the case of the Galapagos Islands, Ecuador. Since it arrived in the archipelago, R. niveus has displaced native plants. Existing control methods have so far been ineffective. Understanding this plant's genetic diversity using molecular markers could explain its invasive success and aid in developing efficient control strategies. Therefore, in this study, we carried out a preliminary analysis of the transferability of heterologous microsatellite markers for the study of genetic diversity of R. niveus in the Galapagos Islands. For this purpose, we collected and analyzed 68 samples from different locations within Santa Cruz, San Cristobal, Isabel, and Floreana islands and 10 samples from Continental Ecuador. We chose 15 microsatellite markers for this study, all of which amplified successfully, demonstrating transferability from one species to another. However, all 15 loci were monomorphic in every amplified sample from the Galapagos Islands and Continental Ecuador, therefore, we were unable to determine the genetic diversity of R. niveus in our samples. Our research with microsatellite markers and similar studies with species in the Rubus genus found monomorphic loci. Therefore, we suggest that a better strategy would be to sequence R. niveus' genome and explore other molecular markers such as Single Nucleotide Polymorphisms to determine genetic diversity levels of this species.
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