Using Surname Models To Study Population Structure And Population Dynamics Of Puerto Rico


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RISE Proposal Presentation. September 16,2009

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Using Surname Models To Study Population Structure And Population Dynamics Of Puerto Rico

  1. 1. Using Surname Models to Study the Population Structure and Population Dynamics of Puerto Rico. Melissa N. Martinez Trinidad 1 Department Of Natural Sciences Prof. Adolfo Gonzalez 1* Department of Mathematics-Physics Jose Alvarado 2 Biostatistician at the Interdisciplinary Research Institute 1,1*,2 University of Puerto Rico at Cayey
  2. 2. Description <ul><li>In Surname models, surnames are used as biomarkers . </li></ul><ul><li>Since 19 th century they have been used to study population dynamics and genetic structure. </li></ul>
  3. 3. Advantages and disadvantages <ul><li>Advantages: </li></ul><ul><li>Sources for raw data: Church records in the past, telephone directories and electoral registries in modern times. </li></ul><ul><li>Disadvantages: </li></ul><ul><li>Most surnames are not monophyletic. </li></ul><ul><ul><li>Nevertheless, surname models have been validated in many occasions . </li></ul></ul>
  4. 4. Project Goals <ul><li>Estimate the population genetic structure of Puerto Rico using the isonymy model. </li></ul><ul><li>Study the surname frequency distribution of the surnames of Puerto Rico, and thus obtain population dynamics indicators related mostly to immigration. </li></ul>
  5. 5. Background and Significance: Population Genetic Structure <ul><li>Isonymy model: First used by George Darwin in 1875 to estimate endogamy in different localities. </li></ul>
  6. 6. <ul><li>Isonymy has been shown to be a valid method for estimating the genetic structure of a population. </li></ul><ul><li>The population genetic structure of PR has not been studied before . </li></ul>Background and Significance: Population Genetic Structure
  7. 7. Consanguinity
  8. 9. Background and Significance: Population Dynamics <ul><li>Surname models in population dynamics first used by Francis Galton and Henry Watson in 1874 to study the extinction of families. </li></ul><ul><li>Distributions of surname frequencies follow a power-law behavior for most countries: y = ax -k </li></ul><ul><li>The surname frequency distribution of PR has not been studied before . </li></ul>
  9. 10. Experimental Design <ul><li>Data collection: telephone directories. </li></ul><ul><li>Data analysis: cluster analysis. </li></ul><ul><li>Minimizing the effect of the polyphyleticity of surnames. </li></ul><ul><li>Surname frequency distribution. </li></ul><ul><li>Effect that the imposition of surnames has on the distribution of surnames. </li></ul>
  10. 11. Literature <ul><li>G H Darwin (1875), “Marriages between first cousins in England and their effects”, Journal of the Statistical Society, volume 38, pp. 153-184 </li></ul><ul><li>A. De Silvestri, and C. R. Guglielmino (2004), “Sicilian Provinces: Population Subdivisions Revealed by Surname Frequencies”, Human Biology, volume 76, pp. 901-920 </li></ul><ul><li>G. Zei, A. Lisa, O. Fiorani, C. Magri, L. Quintana-Murci, O. Semino, and A. S. Santachiara-Benerecetti (2003), “From surnames to the history of Y chromosomes: the Sardinian population as a paradigm”, European Journal of Human Genetics, volume 11, pp. 802-807 </li></ul><ul><li>H. W. Watson and F. Galton (1875), &quot;On the Probability of the Extinction of Families&quot;, Journal of the Anthropological Institute of Great Britain, volume 4, pp. 138–144 </li></ul><ul><li>S. K. Baek, H. A. T. Kiet, and B. J. Kim (2007), “Family name distributions: Master equation approach”, Physical Review E, volume 76, 046113 </li></ul><ul><li>T. E. King, S. J. Ballereau, K. E. Schürer, and M. A. Jobling (2006), “Genetic Signatures of Coancestry within Surnames”, Current Biology, volume 16, pp. 384-388 </li></ul><ul><li>R. Cortés Chico, “Los genes del lupus boricua”, El Nuevo Día, martes 23 de diciembre de 2008, p. 26 </li></ul>
  11. 12. Questions?