Genetic structure among Fijian island populations
| Autor: | Geetanjali Tiwari, Gerhard P. Shipley, Anand P. Tyagi, Diana A. Taylor, Alan J. Redd |
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| Rok vydání: | 2015 |
| Předmět: |
Islands
Male Mitochondrial DNA Chromosomes Human Y Geography Molecular Sequence Data Haplotype Genetic Variation Sequence Analysis DNA Biology Y chromosome DNA Mitochondrial humanities Genetics Population Haplotypes Evolutionary biology Genetic structure Genetic variation Genetics Fiji Humans Microsatellite Genetics (clinical) Microsatellite Repeats |
| Zdroj: | Journal of Human Genetics. 60:69-75 |
| ISSN: | 1435-232X 1434-5161 |
| Popis: | We examined nine Y chromosome short tandem repeats (Y-STRs) and the mitochondrial DNA (mtDNA) hypervariable segment 1 region in the Fijian island populations of Viti Levu, Vanua Levu, Kadavu, the Lau islands and Rotuma. We found significant genetic structure among these populations for the Y-STRs, both with and without the Rotumans, but not for the mtDNA. We also found that all five populations exhibited the sex-biased admixture associated with areas settled by Austronesian-speaking people, with paternal lineages more strongly associated with Melanesian populations and maternal lineages more strongly associated with Polynesian populations. We also found that the Rotumans in the north and the Lau Islanders in the east were genetically more similar to Polynesian populations than were the other Fijians, but only for the mtDNA. For the Y-STRs, the Rotumans and the Lau Islanders were genetically as similar to Melanesian populations as were the other three populations. Of the five populations, the Rotumans were the most different in almost every regard. Although past genetic studies treated the Fijians as being genetically homogenous despite known geographic, phenotypic, cultural and linguistic variation, our findings show significant genetic variation and a need for a closer examination of individual island populations within Fiji, particularly the Rotumans, in order to better understand the process of the peopling of Fiji and of the surrounding regions. |
| Databáze: | OpenAIRE |
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