For some a religious taboo but for most a staple food, pigs have been in our farms and kitchens for many millennia now.
It has been known for long that pigs are just the domestic variety of the Eurasian boar (Sus scrofa) but which populations specifically has been a matter of some debate. Now we know that East Asian pigs were domesticated locally (see appendix) but in the West it was found recently that European pigs have European boar lineages, while West Asian pigs in many cases do not. Previous studies determined that early European pigs were of West Asian ancestry but that by c. 4000 BCE all lineages were local.
This new study explores lineage diversity in ancient West Asian pigs from Anatolia, Kurdistan, Armenia, Georgia and Iran.
Claudio Otoni et al., Pig domestication and human-mediated dispersal in western Eurasia revealed through ancient DNA and geometric morphometrics. MBE 2012. Open access → LINK [doi: 10.1093/molbev/mss261]
Zooarcheological evidence suggests that pigs were domesticated in Southwest Asia ∼8,500 BC. They then spread across the Middle and Near East and westward into Europe alongside early agriculturalists. European pigs were either domesticated independently or appeared so as a result of admixture between introduced pigs and European wild boar. These pigs not only replaced those with Near Eastern signatures in Europe, they subsequently also replaced indigenous domestic pigs in the Near East. The specific details of these processes, however, remainturnover in the Near East, we analyzed ancient mitochondrial DNA and dental geometric morphometric variation in 393 ancient pig specimens representing 48 archeological sites (from the Pre-Pottery Neolithic to the Medieval period) from Armenia, Cyprus, Georgia, Iran, Syria and Turkey. Our results firstly reveal the genetic signature of early domestic pigs in Eastern Turkey. We also demonstrate that these early pigs differed genetically from those in western Anatolia that were introduced to Europe during the Neolithic expansion. In addition, we present a significantly more refined chronology for the introduction of European domestic pigs into Asia Minor that took place during the Bronze Age, nearly 1,000 years earlier than previously detected. By the 5th century AD, European signatures completely replaced the endemic lineages possibly coinciding with the demographic and societal changes during the Anatolian Bronze and Iron Ages.
Probably most interesting is figure 1, which synthesizes the new findings:
All shown West Asian lineages (Y1, Y2, Arm1T and Arm2T) belong to the NE2 clade, a related NE1 clade (common in Southern Iran, Iraq and Egypt, as well as Georgia) was not detected. See fig. 2 for details.
Early European domestic pigs all belonged to the Y1 haplotype, later replaced by the European ones, as mentioned above.
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Appendix: East Asian pigs were domesticated from local boars