March 27, 2003
Y chromosomes of Somalis
Another study confirming the essentially atypical character of Somalis, who are again found to be intermediate between Sub-Saharan Africans and non-Africans.
Short Tandem-Repeat Polymorphism/Alu Haplotype Variation at the PLAT Locus: Implications for Modern Human Origins
S. A. Tishkoff et al., Am. J. Hum. Genet., 67:901-925, 2000
Abstract Two dinucleotide short tandem-repeat polymorphisms (STRPs) and a polymorphic Alu element spanning a 22-kb region of the PLAT locus on chromosome 8p12-q11.2 were typed in 1,2871,420 individuals originating from 30 geographically diverse human populations, as well as in 29 great apes. These data were analyzed as haplotypes consisting of each of the dinucleotide repeats and the flanking Alu insertion/deletion polymorphism. The global pattern of STRP/Alu haplotype variation and linkage disequilibrium (LD) is informative for the reconstruction of human evolutionary history. Sub-Saharan African populations have high levels of haplotype diversity within and between populations, relative to non-Africans, and have highly divergent patterns of LD. Non-African populations have both a subset of the haplotype diversity present in Africa and a distinct pattern of LD. The pattern of haplotype variation and LD observed at the PLAT locus suggests a recent common ancestry of non-African populations, from a small population originating in eastern Africa. These data indicate that, throughout much of modern human history, sub-Saharan Africa has maintained both a large effective population size and a high level of population substructure. Additionally, Papua New Guinean and Micronesian populations have rare haplotypes observed otherwise only in African populations, suggesting ancient gene flow from Africa into Papua New Guinea, as well as gene flow between Melanesian and Micronesian populations.
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"In general, African populations have low frequencies of the Alu(+) allele, in the range of .18.38, with the exception of the Wolof (.44) and the Somali (.47). "
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"In general, populations cluster by geographic origin. The most distinct separation is between African and non-African populations. The northeastern-African that is, the Ethiopian and Somali populations are located centrally between sub-Saharan African and non-African populations. "
Posted by Dienekes at March 27, 2003 06:59 PM | PermaLinkThis study still does not mean much. I have studies of greeks which show that they cluster more closely with sub-saharan africans. The dna sequence does not have significance in and of itself. For example, the difference may relate to environmental commonalities of east-africans of nomadism. The wolof, fulani, hausa, tutsi, rendille, somali, afar, beja, nubian, etc. are all african. I think only a fool would try to say that they are white or closely related to whites. If they are closely related to whites neo-nazis and italians who have killed their fair share of somalis and ethiopians look at them as blacks. Thank you NEO-NAZIS FOR UNITING AFRICANS.
>> I have studies of greeks which show that they cluster more closely with sub-saharan africans.
There are no such studies, save for the discredited study by Arnaiz-Villena et al.
>> The dna sequence does not have significance in and of itself. For example, the difference may relate to environmental commonalities of east-africans of nomadism.
'DNA' has nothing to do with 'environmental commonalities.' Somalis are located centrally between Negroids and non-Negroids because, well, they're intermediate.
>> I think only a fool would try to say that they are white or closely related to whites.
They are not white, they are intermediate between Caucasoids and Negroids.
>> If they are closely related to whites neo-nazis and italians who have killed their fair share of somalis and ethiopians look at them as blacks.
Well, colonial policies may have had terrible effects, but I don't see how relevant they are to the facts.
Posted by: Dienekes at August 2, 2003 07:57 PM>They are not white, they are intermediate between Caucasoids and Negroids.
They're more like intermediate between African and non-African because of OOA, not race mixture. Non-African doesn't mean non-Negroid specifically.
Posted by: Afrohammer at April 18, 2004 10:15 PM