Estructura Genética y Flujo Génico de Poblaciones y Colecciones de Eugenia involucrata DC. de Rio Grande do Sul, Brasil
DOI:
https://doi.org/10.37002/biobrasil.v12i2.2012Palabras clave:
Recurso genético forestal, marcadores moleculares, variabilidad genéticaResumen
Eugenia involucrata DC. es una especie arbórea brasileña con potencial económico. Sin embargo, existe poca información sobre la distribución de su variabilidad genética, conocimiento que es fundamental para planificar programas de conservación genética. Este estudio tuvo como objetivo evaluar la estructura genética y el flujo génico en accesiones de E. involucrata utilizando marcadores RAPD. Se muestrearon individuos de tres poblaciones in situ y de dos colecciones ex situ ubicadas en no estado brasileiro do Rio Grande do Sul. Se utilizaron ocho cebadores RAPD para evaluar la variabilidad genética. Se generaron 60 bandas, 56 de las cuales eran polimórficas. Se estimó un bajo flujo génico entre poblaciones (Nm de 0,2752 a 1,384), lo que resultó en una alta diferenciación genética (FST de 0,153 a 0,476). El análisis de la varianza molecular (AMOVA) reveló que las cinco poblaciones/colecciones estudiadas se estructuran en dos grupos principales, y las poblaciones in situ tienen mayor diversidad genética (He de 0,19 a 0,24) en comparación con las colecciones ex situ (He de 0,08 a 0.10). Se sugiere el enriquecimiento de estas colecciones con germoplasma introducido para incrementar la variabilidad genética.
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