Reconstructing the Human Genetic History of Mainland Southeast Asia: Insights from Genome-Wide Data from Thailand and Laos
| Autor: | Sukrit Sangkhano, Rasmi Shoocongdej, Dang Liu, Sukhum Ruangchai, Jatupol Kampuansai, Metawee Srikummool, Wibhu Kutanan, Leonardo Arias, Pittayawat Pittayaporn, Suparat Srithawong, Mark Stoneking |
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| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
South asia
cultural diffusion Population Biology AcademicSubjects/SCI01180 Genome Polymorphism Single Nucleotide Southeast asia genome-wide 03 medical and health sciences Mainland Southeast Asia Genetic drift Asian People Genetics Humans education Molecular Biology Ecology Evolution Behavior and Systematics Discoveries Alleles 030304 developmental biology Language Whole genome sequencing 0303 health sciences education.field_of_study population interaction Genome Human 030305 genetics & heredity AcademicSubjects/SCI01130 Thailand Geography Evolutionary biology South Asian admixture Laos Genetic structure Mainland |
| Zdroj: | Molecular Biology and Evolution |
| ISSN: | 1537-1719 0737-4038 |
| Popis: | Thailand and Laos, located in the center of Mainland Southeast Asia (MSEA), harbor diverse ethnolinguistic groups encompassing all five language families of MSEA: Tai-Kadai (TK), Austroasiatic (AA), Sino-Tibetan (ST), Hmong-Mien (HM), and Austronesian (AN). Previous genetic studies of Thai/Lao populations have focused almost exclusively on uniparental markers and there is a paucity of genome-wide studies. We therefore generated genome-wide SNP data for 33 ethnolinguistic groups, belonging to the five MSEA language families from Thailand and Laos, and analyzed these together with data from modern Asian populations and SEA ancient samples. Overall, we find genetic structure according to language family, albeit with heterogeneity in the AA-, HM-, and ST-speaking groups, and in the hill tribes, that reflects both population interactions and genetic drift. For the TK speaking groups, we find localized genetic structure that is driven by different levels of interaction with other groups in the same geographic region. Several Thai groups exhibit admixture from South Asia, which we date to ∼600–1000 years ago, corresponding to a time of intensive international trade networks that had a major cultural impact on Thailand. An AN group from Southern Thailand shows both South Asian admixture as well as overall affinities with AA-speaking groups in the region, suggesting an impact of cultural diffusion. Overall, we provide the first detailed insights into the genetic profiles of Thai/Lao ethnolinguistic groups, which should be helpful for reconstructing human genetic history in MSEA and selecting populations for participation in ongoing whole genome sequence and biomedical studies. |
| Databáze: | OpenAIRE |
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