Researchers from Uppsala and Stockholm Universities say that the hunter-gatherers who inhabited the southern coast of Scandinavia 4,000 years ago were lactose intolerant.
The conclusion suggests that today's Scandinavians are not descended from the Stone Age people in question but from a group that arrived later. Results of the research have been published in the journal BMC Evolutionary Biology.
"This group of hunter-gatherers differed significantly from modern Swedes in terms of the DNA sequence that we generally associate with a capacity to digest lactose into adulthood," says Anna Linderholm, formerly of the Archaeological Research Laboratory, Stockholm University.
According to the researchers, two possible explanations exist for the DNA differences.
"One possibility is that these differences are evidence of a powerful selection process, through which the Stone Age hunter-gatherers' genes were lost due to some significant advantage associated with the capacity to digest milk," says Linderholm. "The other possibility is that we simply are not descended from this group of Stone Age people."
The capacity to consume unprocessed milk into adulthood is regarded as having been of great significance for human prehistory.
"This capacity is closely associated with the transition from hunter-gatherer to agricultural societies," says Anders Götherström of the Department of Evolutionary Biology at Uppsala University.
"In the present case, we are inclined to believe that the findings are indicative of what we call "gene flow," in other words, migration to the region at some later time of some new group of people, with whom we are genetically similar," he says. "This accords with the results of previous studies."
Citation: Malmstrom et al., 'High frequency of lactose intolerance in a prehistoric hunter-gatherer population in northern Europe', BMC Evolutionary Biology, 2010, 10(1), 89; doi: 10.1186/1471-2148-10-89
- PHYSICAL SCIENCES
- EARTH SCIENCES
- LIFE SCIENCES
- SOCIAL SCIENCES
Subscribe to the newsletter
Stay in touch with the scientific world!
Know Science And Want To Write?
- How A Former Naturopath Can Help Unravel The Trickery of Alternative Medicine
- Can A New Rule Trigger A Second EU Referendum? Petition Signatures Over 9.7% Of Total Votes Cast
- Better Brains With Beer
- Beneficial Bacteria May Protect Breasts From Cancer
- Some Celiac Disease May Be Due To Viruses
- Finding All-Hadronic Top - Again
- Cross Talk Between Hormone Receptors Has Unexpected Effects
- "However you might be interested to know, we have an interesting system in the Scottish Government..."
- "Right sorry that's probably based on my earlier version of the article and facebook posts. I got..."
- "There's the issue of the population. Even the Puerto Ricans that I work with have a low opinion..."
- "Good for you! Glad to see you've seen the light and are even going so far aa to pursue a degree..."
- "In today's world that is a problem. When the country founded by your ancestors is no longer..."
- Chemistry Can Help Roast the Perfect Coffee Bean
- What Happens To A Soccer Player’s Brain After Missing A Penalty Kick
- It’s Back to Shots for Flu Prevention
- ACSH Applauds Media Awareness of the Fentanyl Crisis
- Counting Bites Examined, to Help Decrease Food Intake
- The Safe And Unsafe Nutty Treats For Your Pup