蓝海人类学在线 Ryan WEI's Forum of Anthropology

查看: 1697|回复: 1

sex bias in Neolithic and Bronze Age Eurasian migrations

发表于 2017-2-25 15:02 | 显示全部楼层 |阅读模式
Ancient X chromosomes reveal contrasting sex bias in Neolithic and Bronze Age Eurasian migrations
Dramatic events in human prehistory, such as the spread of agriculture to Europe from Anatolia and the late Neolithic/Bronze Age migration from the Pontic-Caspian Steppe, can be investigated using patterns of genetic variation among the people who lived in those times. In particular, studies of differing female and male demographic histories on the basis of ancient genomes can provide information about complexities of social structures and cultural interactions in prehistoric populations. We use a mechanistic admixture model to compare the sex-specifically–inherited X chromosome with the autosomes in 20 early Neolithic and 16 late Neolithic/Bronze Age human remains. Contrary to previous hypotheses suggested by the patrilocality of many agricultural populations, we find no evidence of sex-biased admixture during the migration that spread farming across Europe during the early Neolithic. For later migrations from the Pontic Steppe during the late Neolithic/Bronze Age, however, we estimate a dramatic male bias, with approximately five to 14 migrating males for every migrating female. We find evidence of ongoing, primarily male, migration from the steppe to central Europe over a period of multiple generations, with a level of sex bias that excludes a pulse migration during a single generation. The contrasting patterns of sex-specific migration during these two migrations suggest a view of differing cultural histories in which the Neolithic transition was driven by mass migration of both males and females in roughly equal numbers, perhaps whole families, whereas the later Bronze Age migration and cultural shift were instead driven by male migration, potentially connected to new technology and conquest.
发表于 2017-2-25 22:40 | 显示全部楼层
您需要登录后才可以回帖 登录 | 注册


小黑屋|手机版|Archiver|人类生物学在线 ( 苏ICP备16053048号 )

GMT+8, 2019-2-19 22:55 , Processed in 0.158014 second(s), 16 queries .

Powered by Discuz! X3.4

© 2001-2017 Comsenz Inc.

快速回复 返回顶部 返回列表