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M7
Topic Started: Jun 2 2010, 01:49:56 PM (226 Views)
ren
Advanced Member
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2012-3-30
Quoring a quote from http://heritageofjapan.wordpress.com
Quote:
 
M7, B, F and R in Tai/Daic populations Mitochondrial DNA Diversity and Population Differentiation in Southern East Asia “. The most common Daic haplogroups are B4a, F1a, M7b1, B5a, M7b*, M*, R9a, and R9b, in order of
frequency, and the total percentage of these common haplogroups is 48.8%. In the remote AA populations, the most common haplogroups in order of frequency are F1a, M*, D*, F1b, N*, C, M7b*, M7b1, and F1a1a. This list is noticeably but unsurprisingly different from that of the Daic’s. The percentage of the first three haplogroups for the AA populations alone totals 50.8%. The Daic’s haplogroup list is similar, however, to that of the HM’s (B5a, B4a, M*, M7b*, C, B4b1, M7b1, F1a, B4*, and R9b, totaling 50.6%), and is based on these two Southern populations, the Daic and the HM (Wen et al., 2005), we can conclude that B, M7, F, and R are the most characteristically Southern haplogroups. Among Daic populations, the frequencies of these four Southern specific haplogroups total 66.4%, which is higher than the totals in either the AA population (48.9%) or the HM population (58.9%). Moreover, the frequency of these haplogroups is decreased in more northern populations, such as in the Han (40.8%), the more northern Tibeto–Burman (37.5%), and the northernmost Altaic (16.3%). These four haplogroups are, therefore, essential to the study of
matrilineage in South China”
Possibly here’s a KEY to southeast Asians origins: “mtDNA haplogroup distribution in South and North China is obviously unequal (Yao et al., 2002a; Kong et al., 2003a; Wen et al., 2004a,b, 2005), and the haplogroups B, M7, F, R, which are common in South China, are clearly of Southern origin. These Southern haplogroups exist in high frequencies in the Daic, HM, and AA populations, indicating that these three ethnic families are native to South China. The Daic are acknowledged to be the descendants of the Baiyue, a famous, ancient ethnic family, which according to Chinese historical records lived in the coastal zone that now exists between Shanghai and Hanoi 2,000 years ago. This family, in turn, descended from the most powerful ethnic family in South China 8–2,000 years ago (Song, 1991). Their ancestors had comparatively advanced cultures (Song, 1991) (Hemudu Culture, Liangzhu Culture, etc) in these areas during prehistory, and they may have lived in South China for at least 30,000 years”
See also Linguisitic position, Ta-Kadai has early phlogeny – NE Tai-Kadai Hainan Island; N. Vietnam and SEChina (Guizhou and Guangxi) = the TK Homeland Sagart, L. 2004. The higher phylogeny of Austronesian and the position of Tai [Separately, consider the origins of The Negrito of Thailand - Mani and Sakai see]
M7c Sabah / Philippines For help on East Asian lineages, for example, we could take a look at this mtDNA map of M7; M7a (in situ branched off its own M7); M7b (China) and M7c (Sabah or Philippines from the south) Source – The Emerging Twigs of the East Asian mtDNA Tree . It is suggested in the paper though that all the M7 populations separated in Japan and Korea during Jomon times (which is now supported by newer studies that say agriculture (millet) and rice cultivation began in Jomon times far earlier than the supposed traditional Yayoi period. It appears that Japan was probably the terminus for a great many incoming migrating lineages. Looking at the branches of the M7 twig, you can see Japan’s M7a alongside with China, Korea or Island SEA. Haplogroups B5, B6 could be indicative of Austronesian migrations that brought neolithic culture and perhaps megalithic culture (dolmens, jar burials) although the latter are generally thought to have come from Korea because of Kyushu’s proximity





2012-3-14
You can recycle all your posts above, as I've consolidated the info below.
Quote:
 
Hill et al. mention SE Asian "M7*", "M7b" and "M7c" clades in their new paper. Maybe you'll check whether these are the same as in Derenko's paper.
http://www.pubmedcentral.nih.gov/articlere...e=figure&id=FG2

It seems they only tested for M7a and M7b and M7c. The M7* in Hill et al. could be M7d, M7g, M7e, and M7f, based on http://www.phylotree.org/tree/subtree_M.htm Build 13.

Quote:
 

That site no longer exists. Do you remember which Li paper it was that had M7*?

from the ASHG 2009 abstracts:
http://www.ashg.org/2009meeting/abstracts/fulltext/search_page-04.shtml

Quote:
 
The origin of the population on Ontong Java, a Polynesian Outlier in the Solomon Islands, based on the genetic diversity of mtDNA. M. Christiansen1, R. Kuschel2, A. E. Christensen3, P. L. Hedley1,4, C. M. Hagen1, D. Schmidt1, F. H. Aidt1, D. V. Møller1 1) Dept Clinical Biochemistry and Immunology, Statens Serum Inst, Copenhagen, Denmark; 2) Institute of Psychology, University of Copenhagen, Copenhagen, Denmark; 3) Department of Geography and Geology, University of Copenhagen, Denmark; 4) Department of Biomedical Sciences, University of Stellenbosch, Cape Town, South Africa.

Ontong Java (also known as Lord Howe Atoll) is a large atoll in the South West Pacific consisting of 120 islands located 220 km north of Santa Isabel in the Solomon Islands. The total population comprises 3,000 persons, of which 1,850 reside on the island. The remaining population live elsewhere in the Solomon Islands or abroad. Ontong Java is one of numerous Polynesian Outliers in Melanesia; there is also an apparent Micronesian cultural influence and little is known about the origin of the population. In order to establish the origin of the maternal gene pool we collected cheek swabs from 36 persons, representing all unrelated "ramages" (where the members are unrelated at least beyond first cousins) on Ontong Java. Mitochondrial DNA was extracted from 32 samples and the control region was sequenced. The presence of the COII/tRNALys 9 bp deletion was also ascertained and 24 persons (75%) were carriers. In total 10 different haplotypes were identified. Eight haplotypes, comprising 24 persons, belonged to the B4a haplogroup, occuring with a near 100% prevalence in central Polynesia, and two haplotypes, identified in eight persons, belonged to the M7c1 haplogroup, previously found in Micronesia and South East Asia. Twenty-one individuals (66%) had the full Polynesian motif. The B4a cluster comprised a star-like subcluster in an MJ network and three more distant haplotypes. The greater diversity in the B4a haplotypes compared to the M7c1 haplotypes suggests the the Polynesian-derived population may be older than the likely Micronesian-derived population element. An alternative and supplementary explanation is the extensive inter-island contact among the Central Polynesian Outlier atolls. The present population of Ontong Java most likely has a mixed Polynesian and Micronesian origin on the maternal side. The genetic diversity in the B4a haplogroup is compatible with a single expanding Polynesian-derived population in combination with additions from other Polynesian Outliers.


This M7c1 seems to be actually/now designated M7ce, Austronesian-Kradai specific.




Older stuff:

The higher resolution now makes it seem that it has it's origins somewhere near Korea.

"Phylogeographic analysis of mitochondrial DNA in North Asian populations"
Quote:
 
Haplogroup M7, which is characteristic of Eastern Asian populations has not been
found in the northeast Asia4,5,38,68. It is also very rare in Central Asians54,65. This haplogroup
has been detected in island Southeast Asia, China, Vietnam, Korea, Japan, as well as among
Mongols, the Western Siberian Mansi and the Southern Siberian Buryats, Todjins,
Khamnigans and Telenghits8,11,27,50,51,69.


M7a - (coding region: 2626, 2772, 4386, 4958, 12771) and (control region: 16209) transitions almost exclusively in Korea and Japan; SE Asia; M7a has its highest diversity in Ryukyuans (83%) (Tanaka)
_M7a1 - M7a1 highest frequencies (14%) & diversities (86%) in Ryukyuans, also common in whole of China (mean diversity 76%), not been detected in Koreans or Ainu and rare in mainland Japanese (Tanaka)

M7bg (4071)

M7bd (5351, 5460, 7684, 7853, 12405, and 16129)
_M7b (150, 4048, 4164, 6680, and 16297)
__M7b1 is characteristic of Chinese populations (50,69)
__M7b2 - almost exclusively in Korea and Japan (50,69)
_M7d - South Siberians: One Khamnigan, one Telenghit and three Buryat samples harbor a HVS1 motif (16129-16152-16179-16192-16223-16362) that was not present in other populations studied and data sets published. Information from complete mtDNA sequencing reveals that besides M7 haplogroup-specific mutations, samples Khm47 and Br311 share mutations at sites 958,
12358, 14053, 14314 and therefore may represent a new subgroup within M7 haplogroup.
We designate this lineage as M7d (figure 6).

M7cef (146, 11665, and 12091)
_M7c Coding region: 4850, 5442)
__M7c1b - almost exclusively in Korea and Japan (50,69)
__M7c1c is specific to island Southeast Asia", with a time of origin of 6,000 (+-4,000) years, which matches the proposed time of expansion for Austronesian speakers out of Taiwan.[Kivisild et al., 2004]
-M7c2
__M7c2
___M7c2a (15884 and a back mutation at position 16295)
Buryat-specific subcluster

_M7e one Czech individual (out of 1500+); possibly pre-Ice Age




UPDATE 2010-6-3
I had originally stated this:

Quote:
 
Position 199 seems to define M7b'c'd'e.. and they did check for it so I guess M7* is not M7b or M7e..


But it seems that M7d has a reversion at 199, so it could be M7d.
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC2265662/figure/FG6/

Phylogeographic Analysis of Mitochondrial DNA in Northern Asian Populations
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC2265662/?tool=pubmed




The M7(b) in the Mansi could be a signal of repopulation after the LGM, from Mongolia/Chinese Loess. That could mean M7 was there at about 18,000.

Traces of Early Eurasians in the Mansi of Northwest Siberia Revealed by Mitochondrial DNA Analysis
Phylogeographic Analysis of Mitochondrial DNA in Northern Asian Populations
http://www.ncbi.nlm.nih.gov/pubmed/17924343
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC2265662/pdf/AJHGv81p1025.pdf




2010-8-13

Henn and colleagues40 suggested the age of M7a as
another well-defined point, this time for the first colonization
of Japan by modern humans, which dates to at least
32 kya.120 In our calibration, M7a dates to 27.5 (17.3;
38.2) kya, and so encompasses the age of the first human
remains in the archipelago (then part of the mainland).
M7a presents a northeast Asian distribution, with the two
branches (M7a1 and M7a2) both present in Japan42 and
with the latter found so far only in the archipelago, making
an origin of the clade there probable. The problem withM7a
as a calibration point is similar to the one described with U5
and the possibility of a lost nearest ancestor. The closest link
of the clade to its sister clades is via the root of M7, which
dates to nearly 55 kya, opening a large window of opportunities
within which the migration might have occurred.

Correcting for Purifying Selection:
An Improved Human Mitochondrial Molecular Clock
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2694979/pdf/main.pdf




Sources:
Tanaka: Mitochondrial Genome Variation in Eastern Asia and the Peopling of Japan
http://genome.cshlp.org/cgi/content/full/14/10a/1832
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skywalker
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Phylogeography of Quercus variabilis Based on Chloroplast DNA Sequence in East Asia: Multiple Glacial Refugia and Mainland-Migrated Island Populations
The above article has a map shopping how Korea, Japan, and China was connected as a single landmass during the glacial peak. Seems to show the geographic origins of M7, being divided in 2 branches (Koreo-Japan vs. China), pretty well.
http://www.plosone.org/article/fetchObject.action?uri=info:doi/10.1371/journal.pone.0047268.g005&representation=PNG_M
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black man
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There is an "M7b1" star cluster in speakers of Tai-Kadai and Sinitic languages (Lu Yan 2013, fig. 3; Yang Kun 2010, fig. 2; Li Hui 2007, fig. 2). This hg occurs in Austro-Asiatics, Tibeto-Burmese, Hmong-Mien and Austronesians as well but their hts don't contribute much to the star cluster phenomenon if anything at all (ibid.; Trejaut 2005, fig. 2; Peng Minsheng 2010, table 2; Qi Xuebin 2013, fig. S3).

Li Hui et al. 2007, Mitochondrial DNA Diversity and Population Differentiation in Southern East Asia
Peng Minsheng et al. 2010, Tracing the Austronesian Footprint in Mainland Southeast Asia: A Perspective from Mitochondrial DNA
Qi Xuebin et al., Genetic Evidence of Paleolithic Colonization and Neolithic Expansion of Modern Humans on the Tibetan Plateau.
Trejaut et al. 2005, Traces of Archaic Mitochondrial Lineages Persist in Austronesian-Speaking Formosan Populations
Yang Kun et al. 2010, Positive selection on mitochondrial M7 lineages among the Gelong people in Hainan
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ren
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Soares et al. 2016

spread of M7samples
Edited by ren, Jun 25 2018, 02:57:12 PM.
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