...
Post A Reply
my profile
|
directory
login
|
register
|
search
|
faq
|
forum home
»
EgyptSearch Forums
»
Egyptology
»
Nubian aDNA: what the hell is stopping ES members from claiming CL Fox 1997?
» Post A Reply
Post A Reply
Login Name:
Password:
Message Icon:
Message:
HTML is not enabled.
UBB Code™ is enabled.
[QUOTE]Originally posted by Swenet: [QB] [QUOTE]Originally posted by Swenet: [QUOTE]Originally posted by Swenet: mtDNA analysis in ancient Nubians supports the existence of gene flow between sub-Sahara and North Africa in the Nile valley [QUOTE]The Hpal (np3,592) mitochondrial DNA marker is a selectively neutral mutation that is very common in sub-Saharan Africa and is almost absent in North African and European populations. It has been screened in a Meroitic sample from ancient Nubia through PCR amplification and posterior enzyme digestion, to evaluate the sub-Saharan genetic influences in this population. From 29 individuals analysed, only 15 yield positive amplifications, four of them (26.7%) displaying the sub-Saharan African marker. Hpa 1 (np3,592) marker is present in the sub-Saharan populations at a frequency of 68.7 on average. Thus, the frequency of genes from this area in the Merotic Nubian population can be estimated at around 39% (with a confidence interval from 22% to 55%). The frequency obtained fits in a south-north decreasing gradient of Hpa I (np3,592) along the African continent. Results suggest that morphological changes observed historically in the Nubian populations are more likely to be due to the existence of south-north gene flow through the Nile Valley than to in-situ evolution.[/QUOTE]I can't wrap my mind around why this paper is so undercited, aside from Cuckoo Mathilda and her confused puppets. Notice I'm not saying that this paper has been ignored by ES members, as its potential to be misconstrued has been nipped in the bud several times. But why isn't it pro-actively quoted as much as, say, DNA Tribes' Amarna analysis? First of all, judging by the abstract, the authors [i]aren't even saying that these Nubians had 61% non-African mtDNAs[/i], and secondly, their title and abstract are suggesting that they were testing the contributions of Niger Congo speaking Africans in the ancient Nile Valley genepool (which doesn't make sense due to the fact that these lineages predate anything Niger-Congo, but oh well..): [i]Thus, the frequency of genes [b]from this area[/b] in the Merotic Nubian population can be estimated at around 39%[/i] ^They clearly aren't counting Northeast African specific mtDNA Ls (which we now know, are prominent). Thirdly, it is NORMAL for Sudanese to only have ~30% hpa I np 3592 associated uniparentals (L1 and L2): [QUOTE]For mtDNA analysis, a total of 56 haplotypes were observed, all belonging to the major sub-Saharan African and Eurasian mitochondrial macrohapolgroups L0, [b]L1, L2[/b], L4, L5, L3A, M and N in frequencies of 12.1, [b]11.9, 22[/b], 4.2, 6.2, 29.5, 2, and 12.2% respectively.[/QUOTE]--Hassan, 2009 [/QUOTE]For the record, certain aspects of this post are inaccurate. [qb]The Hpal 3592 marker left the mtDNA tree immediately upstream of L4'3, meaning, only L3, L4, M and N lineages lack the Hpal 3592 marker.[/qb] There are exceptions but these exceptions don't have common ancestry with the Hpal 3592 marker upstream of L4'3. [/QUOTE]Repost. Only L3 and L4 are HpaI negative. L5 and L6 are not HpaI negative. L7 has been tucked in with L4 in current phylogeny. [/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