A Preliminary Assessment of the Genetic Diversity and Population Structure of Guava, Psidium guajava, in San Cristobal

Abstract:

The fragile ecosystems of the Galapagos Islands are prone to significant disruptions due to the presence of invasive species. One of these invaders, the guava tree (Psidium guajava), may pose a threat to numerous native plant species and ecosystems across the archipelago. In order to better understand the guava populations of the islands, a preliminary assessment of the genetic diversity of P. guajava from six collection sites in San Cristobal Island, and one continental sample, was performed through the analysis of SSR molecular markers. Various parameters regarding the species’ population genetics and structure were estimated for the samples through different approaches. The results suggest that, as an invasive species, P. guajava presents a reduced genetic diversity, probably as a consequence of a population bottleneck which most likely occurred during their introduction into San Cristobal …

Año de publicación:

2018

Keywords:

Fuente:

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