...
Post A Reply
my profile
|
directory
login
|
register
|
search
|
faq
|
forum home
»
EgyptSearch Forums
»
Egyptology
»
Africans' ability to digest milk linked to spread of cattle raising
» Post A Reply
Post A Reply
Login Name:
Password:
Message Icon:
Message:
HTML is not enabled.
UBB Code™ is enabled.
[QUOTE]Originally posted by Amun-Ra The Ultimate: [QB] This study about European populations place the origin of the very strong positive selective events between 3000 BC to AD 1200 in European populations using aDNA. It's a bit surprising as you would think it would be closer to the beginning of the domestication of cattle (which otherwise can also be kept for their meat. Their blood can also be consumed). Of course many African populations have a completely different LP history since the gene responsible for their LP persistence is generally not the same as Europeans (except for some populations like to Fulani which have a high percentage of the European allele). [QUOTE] [b]Conclusion[/b] Lactase persistence is a genetic trait enabling life-long digestion of the milk sugar lactose. The ability to rely on ruminant secondary products, such as milk, likely conveyed selective advantage during times of resource scarcity, and [b]genetic lactase persistence has independently evolved at least five times in European, Middle Eastern, and African populations[/b] . Previous ancient DNA studies have established that [b]genetic lactase persistence was low or absent in most European Neolithic populations[/b] . In this study, we show that the frequency of lactase persistence in medieval Germany (72%) is similar to that found today in Germany and Austria (71–80%), suggesting that the incomplete selective sweep of the [b]lactase persistence allele may have reached the present allele frequency in western Central Europe by AD 1200[/b] . Although many aspects of the origin and early evolutionary history of the T-13910 LP allele remain uncertain, [b]ancient DNA research has made great strides in narrowing the period of European LP selection to an approximately 4,000 year window spanning 3000 BC to AD 1200[/b] . Future ancient studies on this period are likely to reveal the specific evolutionary forces acting on the T-13910 allele and the relationship between dairying and LP genotypes. [/QUOTE]- From [i]Ancient DNA Analysis Reveals High Frequency of European Lactase Persistence Allele (T-13910) in Medieval Central Europe[/i] [/QB][/QUOTE]
Instant Graemlins
Instant UBB Code™
What is UBB Code™?
Options
Disable Graemlins in this post.
*** Click here to review this topic. ***
Contact Us
|
EgyptSearch!
(c) 2015 EgyptSearch.com
Powered by UBB.classic™ 6.7.3