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Complete mitochondrial genomes of Thai and Lao populations indicate an ancient origin of Austroasiatic groups and demic diffusion in the spread of Tai-Kadai languages
- Source :
- Human Genetics
- Publication Year :
- 2016
-
Abstract
- The Tai-Kadai (TK) language family is thought to have originated in southern China and spread to Thailand and Laos, but it is not clear if TK languages spread by demic diffusion (i.e., a migration of people from southern China) or by cultural diffusion, with native Austroasiatic (AA) speakers switching to TK languages. To address this and other questions, we obtained 1,234 complete mtDNA genome sequences from 51 TK and AA groups from Thailand and Laos. We find high genetic heterogeneity, with 212 haplogroups. TK groups are more genetically homogeneous than AA groups, with the latter exhibiting more ancient/basal mtDNA lineages, and showing more drift effects. Modeling of demic diffusion, cultural diffusion, and admixture scenarios consistently supports the spread of TK languages by demic diffusion. Surprisingly, there is significant genetic differentiation within ethnolinguistic groups, calling into question the common assumption that there is genetic homogeneity within ethnolinguistic groups.
- Subjects :
- 0301 basic medicine
Mitochondrial DNA
China
Genetics
Genetics (clinical)
Population
Socio-culturale
030105 genetics & heredity
Biology
Genome
DNA, Mitochondrial
Haplogroup
03 medical and health sciences
Demic diffusion
Genetic variation
Ethnicity
Humans
Genetics(clinical)
education
Language
education.field_of_study
Genetic heterogeneity
Haplotype
Genetic Variation
Sequence Analysis, DNA
Thailand
030104 developmental biology
Genetics, Population
Logistic Models
Southern china
Haplotypes
Homogeneous
Evolutionary biology
Genome, Mitochondrial
Language family
Erratum
Sequence Alignment
Subjects
Details
- ISSN :
- 14321203
- Volume :
- 136
- Issue :
- 1
- Database :
- OpenAIRE
- Journal :
- Human genetics
- Accession number :
- edsair.doi.dedup.....6f95d6214e97db9d0275edadd96ad593