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

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 t...

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Autores principales:	Villanueva,Pía, Quevedo,Mónica, de Barbieri,Zulema, Piñeiro,Soledad, Herrero,Carolina, Fernández,María Angélica, Palomino,Hernán
Lenguaje:	English
Publicado:	Sociedad Chilena de Anatomía 2015
Materias:	Dental morphological markers Carabelli's cusp Shovel-shaped incisor Robinson Crusoe Island
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022015000200021
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id	oai:scielo:S0717-95022015000200021
record_format	dspace
spelling	oai:scielo:S0717-950220150002000212015-08-13Dental Morphological Markers as a Proxy for Ethnicity in Robinson Crusoe IslandersVillanueva,PíaQuevedo,Mónicade Barbieri,ZulemaPiñeiro,SoledadHerrero,CarolinaFernández,María AngélicaPalomino,Hernán Dental morphological markers Carabelli's cusp Shovel-shaped incisor Robinson Crusoe Island 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.info:eu-repo/semantics/openAccessSociedad Chilena de AnatomíaInternational Journal of Morphology v.33 n.2 20152015-06-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022015000200021en10.4067/S0717-95022015000200021
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	Dental morphological markers Carabelli's cusp Shovel-shaped incisor Robinson Crusoe Island
spellingShingle	Dental morphological markers Carabelli's cusp Shovel-shaped incisor Robinson Crusoe Island Villanueva,Pía Quevedo,Mónica de Barbieri,Zulema Piñeiro,Soledad Herrero,Carolina Fernández,María Angélica Palomino,Hernán Dental Morphological Markers as a Proxy for Ethnicity in Robinson Crusoe Islanders
description	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.
author	Villanueva,Pía Quevedo,Mónica de Barbieri,Zulema Piñeiro,Soledad Herrero,Carolina Fernández,María Angélica Palomino,Hernán
author_facet	Villanueva,Pía Quevedo,Mónica de Barbieri,Zulema Piñeiro,Soledad Herrero,Carolina Fernández,María Angélica Palomino,Hernán
author_sort	Villanueva,Pía
title	Dental Morphological Markers as a Proxy for Ethnicity in Robinson Crusoe Islanders
title_short	Dental Morphological Markers as a Proxy for Ethnicity in Robinson Crusoe Islanders
title_full	Dental Morphological Markers as a Proxy for Ethnicity in Robinson Crusoe Islanders
title_fullStr	Dental Morphological Markers as a Proxy for Ethnicity in Robinson Crusoe Islanders
title_full_unstemmed	Dental Morphological Markers as a Proxy for Ethnicity in Robinson Crusoe Islanders
title_sort	dental morphological markers as a proxy for ethnicity in robinson crusoe islanders
publisher	Sociedad Chilena de Anatomía
publishDate	2015
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022015000200021
work_keys_str_mv	AT villanuevapia dentalmorphologicalmarkersasaproxyforethnicityinrobinsoncrusoeislanders AT quevedomonica dentalmorphologicalmarkersasaproxyforethnicityinrobinsoncrusoeislanders AT debarbierizulema dentalmorphologicalmarkersasaproxyforethnicityinrobinsoncrusoeislanders AT pineirosoledad dentalmorphologicalmarkersasaproxyforethnicityinrobinsoncrusoeislanders AT herrerocarolina dentalmorphologicalmarkersasaproxyforethnicityinrobinsoncrusoeislanders AT fernandezmariaangelica dentalmorphologicalmarkersasaproxyforethnicityinrobinsoncrusoeislanders AT palominohernan dentalmorphologicalmarkersasaproxyforethnicityinrobinsoncrusoeislanders
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Dental Morphological Markers as a Proxy for Ethnicity in Robinson Crusoe Islanders

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