% pubman genre = article @article{item_3595933, title = {{Investigating demic versus cultural diffusion and sex bias in the spread of Austronesian languages in Vietnam}}, author = {Thao, Dinh Huong and Dinh, Tran Huu and Mitsunaga, Shigeki and Duy, La Duc and Phuong, Nguyen Thanh and Anh, Nguyen Phuong and Anh, Nguyen Tho and Duc, Bui Minh and Hue, Huynh Thi Thu and Ha, Nguyen Hai and Ton, Nguyen Dang and H{\"u}bner, Alexander and Pakendorf, Brigitte and Stoneking, Mark and Inoue, Ituro and Duong, Nguyen Thuy and Hai, Nong Van}, editor = {Reepmeyer, Christian}, language = {eng}, issn = {1932-6203}, doi = {10.1371/journal.pone.0304964}, year = {2024}, abstract = {{Austronesian (AN) is the second-largest language family in the world, particularly widespread in Island Southeast Asia (ISEA) and Oceania. In Mainland Southeast Asia (MSEA), groups speaking these languages are concentrated in the highlands of Vietnam. However, our knowledge of the spread of AN-speaking populations in MSEA remains limited; in particular, it is not clear if AN languages were spread by demic or cultural diffusion. In this study, we present and analyze new data consisting of complete mitogenomes from 369 individuals and 847 Y-chromosomal single nucleotide polymorphisms (SNPs) from 170 individuals from all five Vietnamese Austronesian groups (VN-AN) and five neighboring Vietnamese Austroasiatic groups (VN-AA). We found genetic signals consistent with matrilocality in some, but not all, of the VN-AN groups. Population affinity analyses indicated connections between the AN-speaking Giarai and certain Taiwanese AN groups (Rukai, Paiwan, and Bunun). However, overall, there were closer genetic affinities between VN-AN groups and neighboring VN-AA groups, suggesting language shifts. Our study provides insights into the genetic structure of AN-speaking communities in MSEA, characterized by some contact with Taiwan and language shift in neighboring groups, indicating that the expansion of AN speakers in MSEA was a combination of cultural and demic diffusion.}}, journal = {{PLoS One}}, volume = {19}, number = {6}, eid = {e0304964}, }