Genetic differentiation of three Colombian populations of Triatoma dimidiata (Heteroptera: Reduviidae) by ND4 mitochondrial gene molecular analysis

Nelson Grisales, Omar Triana, Víctor Angulo, Nicolás Jaramillo, Gabriel Parra-Henao, Francisco Panzera, Andrés Gómez-Palacio, .

Keywords: Chagas disease, Triatoma, Triatominae, genetics, population, polymorphism, NADH dehydrogenase

Abstract

Introduction. Triatoma dimidiata is the second most important vector of Chagas disease in Colombia after Rhodnius prolixus. Population genetic studies are essential for the adequate design and implementation of vector control and surveillance strategies.
Objective. The level of genetic variability and population differentiation was surveyed among three Colombian populations of T. dimidiata from different geographic locations and ecotopes, using ND4 mitochondrial gene.
Materials and methods. Genetic comparison was made between two wild populations from La Guajira (n=10) and Santander (n=10) provinces, and one intra (n=15) and one peridomiciliary (n=5) population from the Cesar province. The polymorphism frequencies of the ND4 mitochondrial gene sequence were analyzed to deduce population structure based on the 40 samples.
Results. Colombian T. dimidiata showed a high nucleotide (π: 0.034) and haplotype diversity (Hd: 0.863), as well as significant population subdivision (fST: 0.761) and a low migration rate (Nm: 0.157).
Genetic distances and variability differences among populations indicate distinct population subdivision amongst the three provinces.
Conclusion. ND4 proved useful in elucidating the significant genetic differentiation that has occurred among T. dimidiata populations from La Guajira, Cesar and Santander. The analysis suggested a relationship between population subdivision and some eco-epidemiological attributes of this vector from the central eastern and northwestern regions of Colombia.

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  • Nelson Grisales Grupo de Biología y Control de Enfermedades Infecciosas, Sede de Investigación Universitaria, Instituto de Biología, Universidad de Antioquia, Medellín, Colombia
  • Omar Triana Grupo de Biología y Control de Enfermedades Infecciosas, Sede de Investigación Universitaria, Instituto de Biología, Universidad de Antioquia, Medellín, Colombia
  • Víctor Angulo Centro de Investigaciones en Enfermedades Tropicales,Universidad Industrial de Santander, Bucaramanga, Colombia
  • Nicolás Jaramillo Grupo de Biología y Control de Enfermedades Infecciosas, Sede de Investigación Universitaria, Instituto de Biología, Universidad de Antioquia, Medellín, Colombia
  • Gabriel Parra-Henao Instituto Colombiano de Medicina Tropical, Universidad CES, Medellín, Colombia
  • Francisco Panzera Sección Genética Evolutiva, Facultad de Ciencias, Universidad de la República, Montevideo, Uruguay
  • Andrés Gómez-Palacio Grupo de Biología y Control de Enfermedades Infecciosas, Sede de Investigación Universitaria, Instituto de Biología, Universidad de Antioquia, Medellín, Colombia

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How to Cite
1.
Grisales N, Triana O, Angulo V, Jaramillo N, Parra-Henao G, Panzera F, et al. Genetic differentiation of three Colombian populations of Triatoma dimidiata (Heteroptera: Reduviidae) by ND4 mitochondrial gene molecular analysis. biomedica [Internet]. 2010 Aug. 4 [cited 2024 May 18];30(2):207-14. Available from: https://revistabiomedica.org/index.php/biomedica/article/view/184

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