NDLI: Dental Morphological Markers as a Proxy for Ethnicity in Robinson Crusoe Islanders

Content Provider	Scientific Electronic Library Online (SciELO)
Author	Villanueva, Pía Quevedo, Mónica de Barbieri, Zulema Piñeiro, Soledad Herrero, Carolina Fernández, María Angélica Palomino, Hernán
Abstract	Chilean Robinson Crusoe Island is a semi-isolated location with unusually high rates of both consanguinity and language disorder. The current population of 633 inhabitants is descended almost exclusively from the colonization at the end of the 19th century, as there were few preceding immigrations to the island. This study investigates the genetic composition and degree of miscegenation within the island population, using dental morphological markers. The universe of island children was studied (n= 128, 3 to 15 years of age) using clinical exams, dental cast, and identification of each individual within a previously-constructed extensive genealogy for the island. The frequencies for Carabelli's cusp (61.7%), shovel-shaped incisor (9.4%), and sixth cusp (2.3%), along with the absence of seventh cusp, are consistent with a primarily Caucasian population. The estimated degree of miscegenation suggests an Amerindian component of 4.3%, which is consistent with the extensive known genealogies of the founders. Characterizing the genetic profile of Robinson Crusoe Island, a location with a remarkably high prevalence of language disorder, facilitates the comparison of the genetic variants underlying this pathology with those identified in European populations.
Related Links	https://scielo.conicyt.cl/scielo.php?script=sci_abstract&pid=S0717-95022015000200021&lng=en&nrm=iso https://scielo.conicyt.cl/scielo.php?script=sci_arttext&pid=S0717-95022015000200021&lng=en&nrm=iso
Starting Page	538
Ending Page	543
Page Count	6
File Format	PDF
ISSN	07179502
DOI	10.4067/S0717-95022015000200021
Journal	International Journal of Morphology
Issue Number	2
Volume Number	33
Language	English
Publisher	Sociedad Chilena de Anatomía
Publisher Date	2015-06-01
Publisher Institution	Universidad de Chile Faculty of Dentistry Department of Pediatric Dentistry and Dentomaxillary Orthopedics Robinson Crusoe Island Health Public Centre Universidad de Chile Faculty of Medicine Department of Speech Language and Hearing Sciences Universidad de Chile Faculty of Medicine Human Genetics Division
Publisher Place	Chile
Access Restriction	Open
Subject Keyword	Dental morphological markers Carabelli's cusp Shovel-shaped incisor Robinson Crusoe Island Marcadores morfológicos dentarios Tubérculo de Carabelli Incisivo en forma de pala Isla Robinson Crusoe
Alternative Title	Marcadores Morfológicos Dentarios en la Estimación de la Etnicidad Poblacional de la Isla Robinson Crusoe
Content Type	Text
Resource Type	Article
Subject	Anatomy

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