ユーラシアにおけるヒトとイヌの共存の遺伝的証拠を解明(Paleogenomics: humans and dogs spread across Eurasia together)

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2025-11-13 ミュンヘン大学(LMU)

Ludwig Maximilian University of Munich(LMU)など国際共同研究チームが、ユーラシア大陸における人類と犬の移動が少なくとも1万年にわたって密接に関連していたことを古代DNA解析から明らかにしました。研究では、古代の犬ゲノムを東ヨーロッパから東シベリアにわたって調べ、その変遷が当時の人類集団の移動・文化変化と並行していたことを示しています。例えば、人の移住・交易の波とともに、特定の犬集団も共に広がった一方、犬だけが次の地域に残留して人が変わるケースも確認されました。これにより、犬は単なる伴侶動物という枠を超え、ヒト社会や文化の変遷に深く関わる存在であったことが浮かび上がります。また、この研究は「人-犬の共拡散(codispersal)」という視点を通じて、過去の移民・交流体系を探る新たな手がかりを提供しています。

ユーラシアにおけるヒトとイヌの共存の遺伝的証拠を解明(Paleogenomics: humans and dogs spread across Eurasia together)
A comparison of ancient dog and human genomes reveals a striking concordance between genetic shifts in both species across time. | © IMAGO/NurPhoto/xSubaasxShresthax

<関連情報>

東ユーラシアにおけるイヌとヒトの完新世における共分散のゲノム的証拠 Genomic evidence for the Holocene codispersal of dogs and humans across Eastern Eurasia

Shao-Jie Zhang, Lachie Scarsbrook, Haoran Li, Alberto Carmagnini, […] , and Guo-Dong Wang
Science  Published:13 Nov 2025
DOI:https://doi.org/10.1126/science.adu2836

Editor’s summary

Dogs have been a part of human cultures for at least 10,000 years, but we still have much to learn about where these connections emerged and how they were shaped over time. Zhang et al. looked at 73 ancient dog genomes from late Pleistocene-to-early Holocene Eurasia and found clear ancestry evidence that dogs and human populations moved together across time and space, suggesting that dogs were an integral part of human culture at the time. They also found that in some cases, especially where particular working or physical traits were valuable, such as in the Arctic, dogs were likely traded among populations. —Sacha Vignieri

Abstract

As the first domestic species, dogs likely dispersed with different cultural groups during the Late Pleistocene and Holocene. To test this hypothesis, we analyzed 73 ancient dog genomes, including 17 newly sequenced individuals sampled from East Asia to the West Eurasian Steppe spanning nearly 10,000 years. Our results indicate correlations between the ancestry of dogs and specific ancient human populations from eastern Europe to Eastern Siberia, including Ancient Paleo-Siberians, Eastern hunter-gatherers, East Asians, and Steppe pastoralists. We also identify multiple shifts in the ancestry of dogs that coincide with specific dispersals of hunter-gatherers, farmers, and pastoralists. Combined, our results reveal the long-term and integral role that dogs played in a multitude of human societies.

生物工学一般
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