tag:blogger.com,1999:blog-7785493.post880414384539028973..comments2024-01-04T04:11:55.717+02:00Comments on Dienekes’ Anthropology Blog: A note of caution on admixture estimatesDienekeshttp://www.blogger.com/profile/02082684850093948970noreply@blogger.comBlogger6125tag:blogger.com,1999:blog-7785493.post-61332084646309000192011-03-29T05:14:30.538+03:002011-03-29T05:14:30.538+03:00@Fanty
If you are examining the whole community, ...@Fanty<br /><br />If you are examining the whole community, you get efficiencies that you don't get person by person studies of the same records.<br /><br />Also, even significant error rates, so long as they involve women who got pregnant by other men from the same community, don't necessarily impact the results at a population genetic level very much, and even if all you do is to estimate population genetics as of ca. 1850 from population genetics as of ca. 2011, this is a significant accomplishment, and will also provide good empirical estimates of the constants to include in a mathematical model designed to produce Monte Carlo estimates of what the population genetic make up would have been ca. 1600. <br /><br />A huge proportion of the error bars for estimates of old populations comes from inaccurate population modeling, and this could be much, much more accurate than that kind of estimation.andrewhttps://www.blogger.com/profile/08172964121659914379noreply@blogger.comtag:blogger.com,1999:blog-7785493.post-69116453631115282412011-03-23T15:04:43.057+02:002011-03-23T15:04:43.057+02:00"I'm not sure why these scientists are no..."I'm not sure why these scientists are not using family well known history to test in Mexico, there are tons of records, like birth certificates and marriage."<br /><br />Thats a hell of work for each single person. Several monthes of research for each person minimum.<br /><br />Plus, that these documents are not really reliable.<br /><br />For German documents on family history (existing usualy for the past 500 years) its estaminated that about 8% of them are wrong (women got pregnant by other men, and their husbands never knew)<br /><br />So, it would cost several million dollars, take 5 years and 99.9% of the work and cost are the research of family history. And in the end, the results are all wrong still, because the documents are not relyable.Fantyhttps://www.blogger.com/profile/07969348276219179258noreply@blogger.comtag:blogger.com,1999:blog-7785493.post-68436110342957527622011-03-22T22:30:42.856+02:002011-03-22T22:30:42.856+02:00In my opinion, if they are to do further testing s...In my opinion, if they are to do further testing say in Guadalajara Mexico, where the caste system and birthcertificates denoted race. The testing should first do people non mix Nahua descent. Second, first conquest and colonists circa 1550 till 1600 (these families are well known, mine being one of them r1b u106 l48). Then French incursion to Guadalajara and last all other migrations to modern time. <br />I'm not sure why these scientists are not using family well known history to test in Mexico, there are tons of records, like birth certificates and marriage.Cuah123https://www.blogger.com/profile/02783790297470822871noreply@blogger.comtag:blogger.com,1999:blog-7785493.post-30088924898338149012011-03-22T18:59:29.895+02:002011-03-22T18:59:29.895+02:00"West Eurasian-like people have been arriving..."West Eurasian-like people have been arriving to the Indian subcontinent since at least Neolithic times and until quite recently."<br /><br />How do we explain this [the %numbers are approximate]: <br /><br />1. 60% of South Asia is mtDNA M. There is minimal M in West Eurasia. 40% is N of which the most common is U. South Asian U comprised mainly of U2a, U2b, and U2c also absent in West Eurasia. <br /><br />2. South Asian Y-DNA is H 20%; R1a1-M17 20%; L-10%; R2-M124 10% O2a-M95 8%; J2-M172 8%; O3e-M134 5%; F*-M89 5%. <br /><br />Did all the above except J-2 and R1a1 disappear in west eurasia if they have been arriving to the Indian subcontinent since at least Neolithic times? And how did L(xM,N) which was present in neolithic west eurasia get left behind? <br /><br />I do think that a big proportion of R1a1 and some J-2 came from west eurasia to south asia, but I can't see how it could have transformed all of south asia so much.APhttps://www.blogger.com/profile/09934397498634833316noreply@blogger.comtag:blogger.com,1999:blog-7785493.post-85074037287623377482011-03-22T02:00:54.325+02:002011-03-22T02:00:54.325+02:00Very interesting, I agree ADMIXTURE results should...Very interesting, I agree ADMIXTURE results should be analysed in a more scientific manner, theories formulated and results correlated then maybe checked with future available populations for validation.<br /><br />I don't think Lithuanians and other Balts are "pure" Eastern Wave either. Otherwise it seems to reach too far in too large amounts...<br />Eurogenes' recent results on Baltic Finns seems to point out that the Neolithic Near Eastern element predominant in Finns is actually more akin to Scandinavian (more "Western") than it is to Baltic people's.<br />This could imply maybe that Finnish Comb Ceramic Pottery culture was founded by an element from the West Neolithic wave coming from Denmark/Sweden/Pomerania, and there was then some minor fusion with a local now described as "Siberian" hunter-gatherer element. Comb ceramic pottery culture was possibly semi-agriculturalist, with much complementing by hunting because of the cold weather (rye as we know it being a later development). Pure hunter-gatherers have no need for pottery, and as they move constantly it doesn't last much either.<br />Archaeologically this culture seems to have expanded towards the Urals, which is tantalising.<br />Ungrian tongues can be found on the far side of the Urals. Would this imply the proto-uralic homeland may actually coincide with the comb ceramic homeland?Diogeneshttps://www.blogger.com/profile/00827839380414245914noreply@blogger.comtag:blogger.com,1999:blog-7785493.post-24636794532211713212011-03-22T01:22:30.747+02:002011-03-22T01:22:30.747+02:00Thanks Dienekes...
In the following study, they a...Thanks Dienekes...<br /><br />In the following study, they also ran into a similiar issue:<br />Genome-wide patterns of population structure and admixture among Hispanic/Latino populations<br />Katarzyna Bryc <br /><br />"Our results suggest future genome-wide association scans in Hispanic/Latino populations may require correction for local genomic ancestry at a subcontinental scale "<br /><br /><br />The Mexican identity is wrapped into a nationalistic and cultural identity. Other studies have shown that the European conquest of Mexico nearly wiped out the male native population, showing mtnda across several modern populations, and showing differing y dna for those same populations. Basically European males, killed Native Males and ended up with the females. <br /><br />I think its going to be daunting task, unless the studies are broken up into subcontinental regions, in some cases even neighborhoods. Mexico has been mixing for a longer amount of time than it's northern neighbor. Imagine trying to get a picture of the structure of the US, with nearly everyone saying they are native.Cuah123https://www.blogger.com/profile/02783790297470822871noreply@blogger.com