Free Republic
Browse · Search
General/Chat
Topics · Post Article

Skip to comments.

Population expansion in the N African Late Pleistocene signalled by mitochondrial DNA haplogroup U6
7thSpace Interactive ^ | December 21, 2010 | Luisa Pereira et al

Posted on 12/24/2010 7:06:25 AM PST by SunkenCiv

The archaeology of North Africa remains enigmatic, with questions of population continuity versus discontinuity taking centre-stage. Debates have focused on population transitions between the bearers of the Middle Palaeolithic Aterian industry and the later Upper Palaeolithic populations of the Maghreb, as well as between the late Pleistocene and Holocene.

Results: Improved resolution of the mitochondrial DNA (mtDNA) haplogroup U6 phylogeny, by the screening of 39 new complete sequences, has enabled us to infer a signal of moderate population expansion using Bayesian coalescent methods.

To ascertain the time for this expansion, we applied both a mutation rate accounting for purifying selection and one with an internal calibration based on four approximate archaeological dates: the settlement of the Canary Islands, the settlement of Sardinia and its internal population re-expansion, and the split between haplogroups U5 and U6 around the time of the first modern human settlement of the Near East.

Conclusions: A Bayesian skyline plot placed the main expansion in the time frame of the Late Pleistocene, around 20 ka, and spatial smoothing techniques suggested that the most probable geographic region for this demographic event was to the west of North Africa. A comparison with U6's European sister clade, U5, revealed a stronger population expansion at around this time in Europe.

Also in contrast with U5, a weak signal of a recent population expansion in the last 5,000 years was observed in North Africa, pointing to a moderate impact of the late Neolithic on the local population size of the southern Mediterranean coast.

(Excerpt) Read more at 7thspace.com ...


TOPICS: History; Science; Travel
KEYWORDS: africa; emptydna; godsgravesglyphs; merrychristmas; mtdna; smartalecksonfr

full title:
Population expansion in the North African Late Pleistocene signalled by mitochondrial DNA haplogroup U6
full author list:
Luisa Pereira, Nuno Silva, Ricardo Franco-Duarte, Veronica Fernandes, Joana Pereira, Marta Costa, Haide Martins, Pedro Soares, Doron Behar, Martin Richards, Vincent Macaulay

1 posted on 12/24/2010 7:06:29 AM PST by SunkenCiv
[ Post Reply | Private Reply | View Replies]

To: StayAt HomeMother; Ernest_at_the_Beach; 1010RD; 21twelve; 24Karet; 2ndDivisionVet; 31R1O; ...

· GGG managers are SunkenCiv, StayAt HomeMother, and Ernest_at_the_Beach ·
· join list or digest · view topics · view or post blog · bookmark · post a topic · subscribe ·

 
 Antiquity Journal
 & archive
 Archaeologica
 Archaeology
 Archaeology Channel
 BAR
 Bronze Age Forum
 Discover
 Dogpile
 Eurekalert
 Google
 LiveScience
 Mirabilis.ca
 Nat Geographic
 PhysOrg
 Science Daily
 Science News
 Texas AM
 Yahoo
 Excerpt, or Link only?
 


To all -- please ping me to other topics which are appropriate for the GGG list.
 

· History topic · history keyword · archaeology keyword · paleontology keyword ·
· Science topic · science keyword · Books/Literature topic · pages keyword ·


2 posted on 12/24/2010 7:08:42 AM PST by SunkenCiv (The 2nd Amendment follows right behind the 1st because some people are hard of hearing.)
[ Post Reply | Private Reply | View Replies]

To: SunkenCiv

What does that mean in English?


3 posted on 12/24/2010 7:14:06 AM PST by chesley (Eat what you want, and die like a man.)
[ Post Reply | Private Reply | To 1 | View Replies]

To: SunkenCiv

what does this mean?


4 posted on 12/24/2010 7:15:39 AM PST by Sophia777
[ Post Reply | Private Reply | To 2 | View Replies]

To: chesley

lol


5 posted on 12/24/2010 7:16:10 AM PST by Sophia777
[ Post Reply | Private Reply | To 3 | View Replies]

To: chesley; Sophia777; SunkenCiv
What does that mean in English?

Location, location, location...

6 posted on 12/24/2010 7:21:32 AM PST by bigheadfred ( :-)))
[ Post Reply | Private Reply | To 3 | View Replies]

To: SunkenCiv
The archaeology of North Africa remains enigmatic...

I'll admit it's a sort of an enigma that anybody could earn his living turning up monkey bones and human footprints in the same place and claiming that to be evidence of a monkey with human-like feet (Lucy) rather than evidence of a human with a pet monkey having lived near the spot...

7 posted on 12/24/2010 7:27:49 AM PST by wendy1946
[ Post Reply | Private Reply | To 1 | View Replies]

To: wendy1946

You make a very interesting point, Pet Monkey. Dogs were said to be with cave men so why not train a monkey to harvest fruit and such?


8 posted on 12/24/2010 7:31:37 AM PST by mountainlion (concerned conservative.)
[ Post Reply | Private Reply | To 7 | View Replies]

To: chesley

Folks all got fat in the Ice Age.


9 posted on 12/24/2010 7:34:14 AM PST by ThanhPhero (Khach hanh huong den La Vang)
[ Post Reply | Private Reply | To 3 | View Replies]

To: mountainlion

I will suggest that to the cavemen. They haven’t thought of it before.


10 posted on 12/24/2010 7:35:59 AM PST by ThanhPhero (Khach hanh huong den La Vang)
[ Post Reply | Private Reply | To 8 | View Replies]

To: wendy1946; mountainlion

Yeah. And if you couldn’t train the monkey you could always eat him.


11 posted on 12/24/2010 7:36:17 AM PST by bigheadfred ( :-)))
[ Post Reply | Private Reply | To 7 | View Replies]

To: SunkenCiv
Haplogroup 'U'

Haplogroup U5

Among the oldest mtDNA haplogroups found in European remains of Homo sapiens is U5. The age of U5 is estimated at 50,000 but could be as old as 60,500 years. Approximately 11% of total Europeans and 10% of European-Americans are in haplogroup U5.

The presence of haplogroup U5 in Europe pre-dates the expansion of agriculture in Europe. Bryan Sykes' popular book The Seven Daughters of Eve calculated that it arose 45,000-50,000 years ago in Delphi, Greece and named the originator of haplogroup U5 Ursula. However the details related to location and age are speculative. Barbujani and Bertorelle estimate the age of haplogroup U5 as about 52,000 years ago, being the oldest subclade of haplogroup U.

My dad's mother (Mrs. Smith) has mtDNA U5a as does 9,000 year old. Cheddar Man

About 50% of the Sa'ami of Finland have haplogroup U5b, the other (about ) 50% have haplogroup 'V', same as me.

12 posted on 12/24/2010 8:00:14 AM PST by blam
[ Post Reply | Private Reply | To 1 | View Replies]

To: SunkenCiv

Whew. I had been wondering about this for a long time.


13 posted on 12/24/2010 8:25:19 AM PST by SgtHooper
[ Post Reply | Private Reply | To 1 | View Replies]

To: SunkenCiv

14 posted on 12/24/2010 8:43:46 AM PST by JoeProBono (A closed mouth gathers no feet - Visualize)
[ Post Reply | Private Reply | To 1 | View Replies]

To: blam; SunkenCiv; All

Do you know anything about getting a DNA test for (your) own ancestry? I see National Geographic has one for $100.

Been thinking of having it done. Some experienced input would help.

Merry Christmas!


15 posted on 12/24/2010 8:48:58 AM PST by bigheadfred ( :-)))
[ Post Reply | Private Reply | To 12 | View Replies]

To: SunkenCiv

“we applied both a mutation rate accounting for purifying selection”

Another of those artificial yard-sticks used to rationalize any conclusion you’d like.


16 posted on 12/24/2010 8:50:14 AM PST by G Larry (When you're right, avoid compromise!)
[ Post Reply | Private Reply | To 1 | View Replies]

I am still confused.


17 posted on 12/24/2010 8:54:35 AM PST by Sophia777
[ Post Reply | Private Reply | To 16 | View Replies]

To: bigheadfred
Almost no limit to what you can train monkeys to do...
18 posted on 12/24/2010 9:09:14 AM PST by wendy1946
[ Post Reply | Private Reply | To 11 | View Replies]

To: SunkenCiv; blam
Saami and Berbers--an unexpected mitochondrial DNA link.
2005 Mar 24.
19 posted on 12/24/2010 9:23:38 AM PST by Viiksitimali
[ Post Reply | Private Reply | To 1 | View Replies]

To: wendy1946

You could prolly even train one to be POTUS.


20 posted on 12/24/2010 11:00:08 AM PST by bigheadfred ( :-)))
[ Post Reply | Private Reply | To 18 | View Replies]

To: Sophia777

It appears to me they have been having a hard time pinpointing the source of expansion of certain DNA into the southern Mediterranean region of Europe. Apparently from the new sequences they can see the time frame of the expansion and that West North Africa may be the source.

I’m sure there is a lot of archeological evidence to be found in that region of Africa. It’s just buried under the sands of the Sahara. So they probably don’t have much of that. They probably have more in Sardinia, etc., and some in Africa that is similar. Following the genome helps place the source.


21 posted on 12/24/2010 11:23:08 AM PST by bigheadfred ( :-)))
[ Post Reply | Private Reply | To 17 | View Replies]

To: bigheadfred

A good many of the surname genealogy associations (at least two in my own ancestry) have deals on those.


22 posted on 12/24/2010 11:53:40 AM PST by SunkenCiv (The 2nd Amendment follows right behind the 1st because some people are hard of hearing.)
[ Post Reply | Private Reply | To 15 | View Replies]

To: SunkenCiv

Have you done it? And are you relatively satisfied with the results? Did your people originate in Bimini? Have I said Merry Christmas to you yet?


23 posted on 12/24/2010 12:01:51 PM PST by bigheadfred (Merry Christmas)
[ Post Reply | Private Reply | To 22 | View Replies]

To: JoeProBono

Some Like It Hot?


24 posted on 12/24/2010 12:16:44 PM PST by happygrl
[ Post Reply | Private Reply | To 14 | View Replies]

To: bigheadfred
"Do you know anything about getting a DNA test for (your) own ancestry? I see National Geographic has one for $100."

Years ago when I had my DNA checked at National Geographic/IBM, I posted this article and associated links. Many other FReepers did so also and I've yet heard anyone complain. So...

The Genographic Project (Have Your DNA Checked, Find Your Roots)

I was satisfied with my results, etc.

25 posted on 12/24/2010 12:53:41 PM PST by blam
[ Post Reply | Private Reply | To 15 | View Replies]

To: blam

Thank you kindly.


26 posted on 12/24/2010 12:55:05 PM PST by bigheadfred (Merry Christmas)
[ Post Reply | Private Reply | To 25 | View Replies]

To: Viiksitimali

Excellent. Thanks.


27 posted on 12/24/2010 1:02:09 PM PST by blam
[ Post Reply | Private Reply | To 19 | View Replies]

To: blam

Did your grandmother do the test as well, Blam? Are you a youngster?


28 posted on 12/24/2010 2:56:16 PM PST by spyone (ridiculum)
[ Post Reply | Private Reply | To 12 | View Replies]

To: SunkenCiv
Debates have focused on population transitions between the bearers of the Middle Palaeolithic Aterian industry and the later Upper Palaeolithic populations of the Maghreb, as well as between the late Pleistocene and Holocene.

Oh, man, are they gonna start that argument again?

29 posted on 12/24/2010 3:07:54 PM PST by GreenHornet
[ Post Reply | Private Reply | To 1 | View Replies]

To: spyone
"Did your grandmother do the test as well, Blam? Are you a youngster?"

No. In fact I never knew either of my dad's parents. I got the results from his sister's daughter...my cousin.

mtDNA is passed along only through the females.

I have my mother's mtDNA which is haplogroup 'V'. My sisters have passed this on to their daughters.

My son has my yDNA (R1b) and his mother's mtDNA (haplogroup 'H'). Haplogroups R1b & 'H' are the most common amoungst Europeans at about 68% each.

30 posted on 12/24/2010 3:29:16 PM PST by blam
[ Post Reply | Private Reply | To 28 | View Replies]

To: blam

Can you recommend a website where I can see all the different Halogroups(how many are there?) and where the highest percentages are. Many thanks.


31 posted on 12/24/2010 4:30:15 PM PST by spyone (ridiculum)
[ Post Reply | Private Reply | To 30 | View Replies]

To: spyone
"Can you recommend a website where I can see all the different Halogroups(how many are there?) and where the highest percentages are. Many thanks."

This ought to get you started. When you have learned all this, let me know and I'll link you to some of the advanced stuff:

Origins, Age, Spread And Ethnic Association Of European Haplogroups And Subclades

32 posted on 12/24/2010 7:14:18 PM PST by blam
[ Post Reply | Private Reply | To 31 | View Replies]

To: SunkenCiv

I for one, am happy the children were here to hear that authentic frontier gibberish.


33 posted on 12/24/2010 9:22:06 PM PST by Walkingfeather
[ Post Reply | Private Reply | To 2 | View Replies]

To: bigheadfred

Merry Christmas!


34 posted on 12/24/2010 10:40:37 PM PST by SunkenCiv (The 2nd Amendment follows right behind the 1st because some people are hard of hearing.)
[ Post Reply | Private Reply | To 23 | View Replies]

To: blam

Thanks Blam! That is excellent.


35 posted on 12/25/2010 8:21:48 AM PST by spyone (ridiculum)
[ Post Reply | Private Reply | To 32 | View Replies]

Disclaimer: Opinions posted on Free Republic are those of the individual posters and do not necessarily represent the opinion of Free Republic or its management. All materials posted herein are protected by copyright law and the exemption for fair use of copyrighted works.

Free Republic
Browse · Search
General/Chat
Topics · Post Article

FreeRepublic, LLC, PO BOX 9771, FRESNO, CA 93794
FreeRepublic.com is powered by software copyright 2000-2008 John Robinson