Human inbreeding has decreased in time through the Holocene


Ceballos F. C., Gurun K., ALTINIŞIK N. E., Gemici H. C., Karamurat C., Koptekin D., ...Daha Fazla

CURRENT BIOLOGY, cilt.31, sa.17, ss.3925-3943, 2021 (SCI-Expanded) identifier identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 31 Sayı: 17
  • Basım Tarihi: 2021
  • Doi Numarası: 10.1016/j.cub.2021.06.027
  • Dergi Adı: CURRENT BIOLOGY
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Academic Search Premier, Animal Behavior Abstracts, Aquatic Science & Fisheries Abstracts (ASFA), Artic & Antarctic Regions, BIOSIS, CAB Abstracts, Chemical Abstracts Core, EMBASE, Linguistic Bibliography, MEDLINE, Veterinary Science Database
  • Sayfa Sayıları: ss.3925-3943
  • Orta Doğu Teknik Üniversitesi Adresli: Evet

Özet

The history of human inbreeding is controversial.(1) In particular, how the development of sedentary and/or agricultural societies may have influenced overall inbreeding levels, relative to those of hunter-gatherer communities, is unclear.(2-5) Here, we present an approach for reliable estimation of runs of homozygosity (ROHs) in genomes with >= 3x mean sequence coverage across >1 million SNPs and apply this to 411 ancient Eurasian genomes from the last 15,000 years.(5-34) We show that the frequency of inbreeding, as measured by ROHs, has decreased over time. The strongest effect is associated with the Neolithic transition, but the trend has since continued, indicating a population size effect on inbreeding prevalence. We further show that most inbreeding in our historical sample can be attributed to small population size instead of consanguinity. Cases of high consanguinity were rare and only observed among members of farming societies in our sample. Despite the lack of evidence for common consanguinity in our ancient sample, consanguineous traditions are today prevalent in various modem-day Eurasian societies,(1, 35-37) suggesting that such practices may have become widespread within the last few millennia.