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Series GSE53445 Query DataSets for GSE53445
Status Public on Dec 19, 2013
Title Genome wide evidence of Austronesian-Bantu admixture and cultural reversion in a hunter-gatherer group of Madagascar
Organism Homo sapiens
Experiment type SNP genotyping by SNP array
Genome variation profiling by SNP array
Summary Linguistic and cultural evidence suggests that Madagascar was the final point of two major dispersals of Austronesian and Bantu speaking populations. Today, Mikea are described as the last known Malagasy population reported to be still practising a hunter-gatherer life-style. It is unclear, however, whether Mikea descend from a remnant population that existed before the arrival of Austronesian and Bantu agriculturalists or whether it is only their life-style that separates them from the other contemporary populations of South Madagascar. In order to address these questions we have performed a genome wide analysis of >700,000 SNP markers on 21 Mikea, 24 Vezo and 24 Temoro individuals together with 50 individuals from Bajo and Lebbo populations from Indonesia. Our analyses of these data in the context of data available from other Southeast Asian and African populations reveal that all three Malagasy populations are derived from the same admixture event involving Austronesian and Bantu sources. In contrast to the fact that most of the vocabulary of the Malagasy speakers is derived from the Barito group of the Austronesian language family we observe that only one third of their genetic ancestry is related to the populations of Java-Kalimantan-Sulawesi area. Because no additional ancestry components distinctive to for the Mikea were found, it is likely that they have adopted their hunter-gatherer way of life by through cultural reversion.
Overall design 69 samples were analysed with the Illumina platform OmniExpress BeadChips and are described herein.
Contributor(s) Pierron D, Razafindrazaka H, Pagani L, Ricaut F, Antao T, Capredon M, Sambo C, Radimilahy C, Rakotoarisoa J, Blench RM, Letellier T, Kivisild T
Citation(s) 24395773
Submission date Dec 18, 2013
Last update date Jun 10, 2020
Contact name Luca Pagani
Organization name University of Cambridge
Department Biological Anthropology
Lab Mega
Street address Henry Wellcome Building, Fitzwilliam Street
City Cambridge
State/province UK
ZIP/Postal code CB2 1QH
Country United Kingdom
Platforms (1)
GPL13135 HumanOmniExpress BeadChip
Samples (69)
GSM1293648 MadMA317
GSM1293649 MadMA318
GSM1293650 MadMA320
This SubSeries is part of SuperSeries:
GSE152200 Aborigines of Taiwan and their genetic relationship to East Asian and Pacific populations
BioProject PRJNA232031

Download family Format
SOFT formatted family file(s) SOFTHelp
MINiML formatted family file(s) MINiMLHelp
Series Matrix File(s) TXTHelp

Supplementary file Size Download File type/resource
GSE53445_Madagascar_Matrix_Processed.txt.gz 861.8 Mb (ftp)(http) TXT
GSE53445_Madagascar_signal_intensities.txt.gz 647.9 Mb (ftp)(http) TXT
Processed data included within Sample table
Processed data are available on Series record

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