Isonymy analysis between 2 populations in northwestern Colombia

Gabriel Bedoya, Jenny García, Patricia Montoya, Winston Rojas, Maria Eugenia Amézquita, Iván Soto, Maria Cecilia López, Jorge Ospina-Duque, Andrés Ruiz-Linares, .

Keywords: Names, genetics, population, consanguinity, founder effect, Colombia

Abstract

Introduction. Surname frequency (isonymy) is used as a marker of paternal lineage and is used to characterize human population structure. Principles of isonymy were used to determine the genetic structure, migration rates, ancestry relations and origins of populations. This analysis was applied to two historically related local populations which currently are considered to be genetically isolated.
Objective. The genetic relationships and influence zones of the Aranzazu and Marinilla populations were assessed by means of surname frequency analysis.
Materials and methods. Data originated from database with the title "System of Identification of Beneficiaries of the Social Programs" database or Sisben. Population parameters such as a priori kinship (fii), population homogeneity with B and C estimators, and Cavalli-Sforza's genetic distance were calculated for (a) three towns of Marinilla and its influence zone and (b) Aranzazu. The Rionegro population served as an external, comparison population.
Results. The Aranzazu and Marinilla populations showed the higher homogeneity (B value between 0.25 and 0.5) in contrast with Rionegro (B = 0.159), as well as greater a priori kinship values (fii between 0.003 and 0.010). The lowest distances were found between Marinilla and Aranzazu.
Conclusions. Aranzazu is a population with characteristics similar to those of Marinilla and its influence zone. The close similarity of genetic characteristics for these populations is due probably to a founder effect. Furthermore, the genetic similarity predicts that genetic diseases will have the same etiology in both populations and provides optimum conditions for gene mapping studies.

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  • Gabriel Bedoya Grupo de Genética Molecular (GENMOL), Facultad de Medicina, Universidad de Antioquia, Medellín, Colombia.
  • Jenny García Grupo de Investigación en Psiquiatría (GIPSI), Departamento de Psiquiatría, Facultad de Medicina, Universidad de Antioquia, Medellín, Colombia.
  • Patricia Montoya Grupo de Investigación en Psiquiatría (GIPSI), Departamento de Psiquiatría, Facultad de Medicina, Universidad de Antioquia, Medellín, Colombia.
  • Winston Rojas Grupo de Genética Molecular (GENMOL), Facultad de Medicina, Universidad de Antioquia, Medellín, Colombia.
  • Maria Eugenia Amézquita Departamento de Psiquiatría, Universidad de Caldas, Manizales, Colombia.
  • Iván Soto Grupo de Genética Molecular (GENMOL), Facultad de Medicina, Universidad de Antioquia, Medellín, Colombia.
  • Maria Cecilia López Grupo de Investigación en Psiquiatría (GIPSI), Departamento de Psiquiatría, Facultad de Medicina, Universidad de Antioquia, Medellín, Colombia
  • Jorge Ospina-Duque Grupo de Investigación en Psiquiatría (GIPSI), Departamento de Psiquiatría, Facultad de Medicina, Universidad de Antioquia, Medellín, Colombia.
  • Andrés Ruiz-Linares Grupo de Genética Molecular (GENMOL), Facultad de Medicina, Universidad de Antioquia, Medellín, Colombia.

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How to Cite
1.
Bedoya G, García J, Montoya P, Rojas W, Amézquita ME, Soto I, et al. Isonymy analysis between 2 populations in northwestern Colombia. biomedica [Internet]. 2006 Dec. 1 [cited 2024 May 16];26(4):538-45. Available from: https://revistabiomedica.org/index.php/biomedica/article/view/323

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Published
2006-12-01
Section
Original articles

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