Sardinians genetic background explained by runs of homozygosity and genomic regions under positive selection.

The peculiar position of Sardinia in the Mediterranean sea has rendered its population an interesting biogeographical isolate. The aim of this study was to investigate the genetic population structure, as well as to estimate Runs of Homozygosity and regions under positive selection, using about 1.2...

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Autores principales: Cornelia Di Gaetano, Giovanni Fiorito, Maria Francesca Ortu, Fabio Rosa, Simonetta Guarrera, Barbara Pardini, Daniele Cusi, Francesca Frau, Cristina Barlassina, Chiara Troffa, Giuseppe Argiolas, Roberta Zaninello, Giovanni Fresu, Nicola Glorioso, Alberto Piazza, Giuseppe Matullo
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Publicado: Public Library of Science (PLoS) 2014
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spelling oai:doaj.org-article:29d637149f91424aae866f3bfce5f0ce2021-11-18T08:27:09ZSardinians genetic background explained by runs of homozygosity and genomic regions under positive selection.1932-620310.1371/journal.pone.0091237https://doaj.org/article/29d637149f91424aae866f3bfce5f0ce2014-01-01T00:00:00Zhttps://www.ncbi.nlm.nih.gov/pmc/articles/pmid/24651212/?tool=EBIhttps://doaj.org/toc/1932-6203The peculiar position of Sardinia in the Mediterranean sea has rendered its population an interesting biogeographical isolate. The aim of this study was to investigate the genetic population structure, as well as to estimate Runs of Homozygosity and regions under positive selection, using about 1.2 million single nucleotide polymorphisms genotyped in 1077 Sardinian individuals. Using four different methods--fixation index, inflation factor, principal component analysis and ancestry estimation--we were able to highlight, as expected for a genetic isolate, the high internal homogeneity of the island. Sardinians showed a higher percentage of genome covered by RoHs>0.5 Mb (F(RoH%0.5)) when compared to peninsular Italians, with the only exception of the area surrounding Alghero. We furthermore identified 9 genomic regions showing signs of positive selection and, we re-captured many previously inferred signals. Other regions harbor novel candidate genes for positive selection, like TMEM252, or regions containing long non coding RNA. With the present study we confirmed the high genetic homogeneity of Sardinia that may be explained by the shared ancestry combined with the action of evolutionary forces.Cornelia Di GaetanoGiovanni FioritoMaria Francesca OrtuFabio RosaSimonetta GuarreraBarbara PardiniDaniele CusiFrancesca FrauCristina BarlassinaChiara TroffaGiuseppe ArgiolasRoberta ZaninelloGiovanni FresuNicola GloriosoAlberto PiazzaGiuseppe MatulloPublic Library of Science (PLoS)articleMedicineRScienceQENPLoS ONE, Vol 9, Iss 3, p e91237 (2014)
institution DOAJ
collection DOAJ
language EN
topic Medicine
R
Science
Q
spellingShingle Medicine
R
Science
Q
Cornelia Di Gaetano
Giovanni Fiorito
Maria Francesca Ortu
Fabio Rosa
Simonetta Guarrera
Barbara Pardini
Daniele Cusi
Francesca Frau
Cristina Barlassina
Chiara Troffa
Giuseppe Argiolas
Roberta Zaninello
Giovanni Fresu
Nicola Glorioso
Alberto Piazza
Giuseppe Matullo
Sardinians genetic background explained by runs of homozygosity and genomic regions under positive selection.
description The peculiar position of Sardinia in the Mediterranean sea has rendered its population an interesting biogeographical isolate. The aim of this study was to investigate the genetic population structure, as well as to estimate Runs of Homozygosity and regions under positive selection, using about 1.2 million single nucleotide polymorphisms genotyped in 1077 Sardinian individuals. Using four different methods--fixation index, inflation factor, principal component analysis and ancestry estimation--we were able to highlight, as expected for a genetic isolate, the high internal homogeneity of the island. Sardinians showed a higher percentage of genome covered by RoHs>0.5 Mb (F(RoH%0.5)) when compared to peninsular Italians, with the only exception of the area surrounding Alghero. We furthermore identified 9 genomic regions showing signs of positive selection and, we re-captured many previously inferred signals. Other regions harbor novel candidate genes for positive selection, like TMEM252, or regions containing long non coding RNA. With the present study we confirmed the high genetic homogeneity of Sardinia that may be explained by the shared ancestry combined with the action of evolutionary forces.
format article
author Cornelia Di Gaetano
Giovanni Fiorito
Maria Francesca Ortu
Fabio Rosa
Simonetta Guarrera
Barbara Pardini
Daniele Cusi
Francesca Frau
Cristina Barlassina
Chiara Troffa
Giuseppe Argiolas
Roberta Zaninello
Giovanni Fresu
Nicola Glorioso
Alberto Piazza
Giuseppe Matullo
author_facet Cornelia Di Gaetano
Giovanni Fiorito
Maria Francesca Ortu
Fabio Rosa
Simonetta Guarrera
Barbara Pardini
Daniele Cusi
Francesca Frau
Cristina Barlassina
Chiara Troffa
Giuseppe Argiolas
Roberta Zaninello
Giovanni Fresu
Nicola Glorioso
Alberto Piazza
Giuseppe Matullo
author_sort Cornelia Di Gaetano
title Sardinians genetic background explained by runs of homozygosity and genomic regions under positive selection.
title_short Sardinians genetic background explained by runs of homozygosity and genomic regions under positive selection.
title_full Sardinians genetic background explained by runs of homozygosity and genomic regions under positive selection.
title_fullStr Sardinians genetic background explained by runs of homozygosity and genomic regions under positive selection.
title_full_unstemmed Sardinians genetic background explained by runs of homozygosity and genomic regions under positive selection.
title_sort sardinians genetic background explained by runs of homozygosity and genomic regions under positive selection.
publisher Public Library of Science (PLoS)
publishDate 2014
url https://doaj.org/article/29d637149f91424aae866f3bfce5f0ce
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