Analysis of genetic diversity in two plantations of <i>Pinus caribaea</i> var. <i>hondurensis</i>

Abstract

Forest tree breeding activities in plantations with exotic species implies several instances of material selection where genetic variation can be affected. The objective of the work was to verify the genetic variability present in two plantations of Pinus caribaea var. hondurensis by microsatellite markers, initially designed for Pinus taeda fluorescent-labeled. Thus, 299 individuals were analyzed using eight polymorphic microsatellite markers. The results indicate that both plantations have adequate levels of genetic diversity that are representative of the Pinus genus. Through the Bayesian method, it was possible to detect two different population genetic structures (K = 2) between both plantations analyzed. In conclusion, this study suggests that microsatellites markers are useful tools to monitor genetic variation in genetic breeding programs. The genetic diversity estimated in both plantations is similar and typical for Pinus plantations, and as expected, there was a slight decrease in genetic variability in the commercial plantation in comparation with the base plantation.

Marcadores moleculares aplicados a estratégias na conservação de espécies florestais

“…Essas modificações, que conduzem à diminuição do tamanho populacional de várias espécies, ampliam os efeitos da deriva genética, aumentando, por conseguinte, o risco de perda da diversidade genética e comprometendo a sua conservação a longo prazo. Por isso, é de extrema importância direcionar esforços para mitigar os impactos dessas mudanças e para fomentar o incremento da variabilidade genética já existente (Golle et al, 2009;Schmid et al, 2022).…”