Say good-bye to dancing sambo.
Notably, 62% of the Ethiopians fall in the first cluster, which encompasses the majority of the Jews, Norwegians and Armenians, indicating that placement of these individuals in a Black cluster would be an inaccurate reflection of the genetic structure. Only 24% of the Ethiopians are placed in the cluster with the Bantu and most of the Afro-Caribbeans. (Passarino et al. 1998)
On the basis of historical, linguistic, and genetic data, it has been suggested that the Ethiopian population has been strongly affected by Caucasoid migrations since Neolithic times. On the basis of autosomal polymorphic loci, it has been estimated that 60% of the Ethiopian gene pool has an African origin, whereas ~40% is of Caucasoid derivation
. Our Ethiopian sample also lacks the sY81-G allele, which was associated with 86% and 69% of Senegalese and mixed-African YAP+ chromosomes, respectively. This suggests that male-mediated gene flow from Niger-Congo speakers to the Ethiopian population was probably very limited
Caucasoid gene flow into the Ethiopian gene pool occurred predominantly through males. Conversely, the Niger-Congo contribution to the Ethiopian population occurred mainly through females. (Poloni et al. 1997)
Ethiopian mitochondrial DNA heritage: tracking gen...[Am J Hum Genet. 2004] - PubMed Result
Human Biology 75.2 (2003) 293-300
The occurrence of E*5 212 and E*5 204 alleles in two populations of the Mediterranean basin (Turkey and Italy) but not in West Africans can be explained by taking into account that the Ethiopian gene pool was estimated to be >40% of Caucasoid derivation (Cavalli-Sforza et al. 1994). In addition, more recent phylogenetic analysis based on classical protein polymorphism (Tartaglia et al. 1996) and Y-chromosome sequence variation (Underhill et al. 2000) showed that Ethiopians appear to be distinct from Africans and more closely associated with populations of the Mediterranean basin.
Genetic Variation at Apolipoprotein E Locus in Ethiopia:
An E5 Variant Corresponds to Two Different Mutant Alleles: E*5 (Glu212Lys) and E*5 (Gln204Lys; Cys112Arg) R. Scacchi et al.
Approximately 10 miles separate the Horn of Africa from the Arabian Peninsula at Bab-el-Mandeb (the Gate of Tears). Both historic and archaeological evidence indicate tight cultural connections, over millennia, between these two regions. High-resolution phylogenetic analysis of 270 Ethiopian and 115 Yemeni mitochondrial DNAs was performed in a worldwide context, to explore gene flow across the Red and Arabian Seas. Nine distinct subclades, including three newly defined ones, were found to characterize entirely the variation of Ethiopian and Yemeni L3 lineages. Both Ethiopians and Yemenis contain an almost-equal proportion of Eurasian-specific M and N and African-specific lineages and therefore cluster together in a multidimensional scaling plot between Near Eastern and sub-Saharan African populations. Phylogeographic identification of potential founder haplotypes revealed that approximately one-half of haplogroup L0-L5 lineages in Yemenis have close or matching counterparts in southeastern Africans, compared with a minor share in Ethiopians. Newly defined clade L6, the most frequent haplogroup in Yemenis, showed no close matches among 3,000 African samples. These results highlight the complexity of Ethiopian and Yemeni genetic heritage and are consistent with the introduction of maternal lineages into the South Arabian gene pool from different source populations of East Africa. A high proportion of Ethiopian lineages, significantly more abundant in the northeast of that country, trace their western Eurasian origin in haplogroup N through assorted gene flow at different times and involving different source populations. (Toomas Kivisild et al.)
Though present-day Ethiopia is a land of great ethnic diversity, the majority of Ethiopians speak different Semitic, Cushitic, and Omotic languages that belong to the Afro-Asiatic linguistic phylum. Maternal lineages of Semitic- (Amharic, Tigrinya, and Gurage) and Cushitic- (Oromo and Afar) speaking populations studied here reveal that their mtDNA pool is a nearly equal composite of sub-Saharan and western Eurasian lineages. This finding, consistent with classic genetic-marker studies (Cavalli-Sforza 1997) and previous mtDNA results, is also in agreement with a similarly high proportion of western Asian Y chromosomes in Ethiopians (Passarino et al. 1998; Semino et al. 2002), which supports the view (Richards et al. 2003) that the observed admixture between sub-Saharan African and, most probably, western Asian ancestors of the Ethiopian populations applies to their gene pool in general. (Am. J. Hum. Genet., 75:000, 2004)
The present composition of the Ethiopian population is the result of a complex and extensive intermixing of different peoples of North African, Near and Middle Eastern, and south-Saharan origin. The two main groups inhabiting the country are the Amhara, descended from Arabian conquerors, and the Oromo, the most important group among the Cushitic people.
The genetic distance analysis showed the separation between African and non-African populations, with the Amhara and Oromo located in an intermediate position. (De Stefano et al. 2002)
Non sub-Saharan African samples are all grouped together
with
the Ethiopian Amharic sample [on the Y-chromosome]. Ethiopians are not statistically differentiated from the Egyptian and Tunisian samples, in agreement with their linguistic affiliation with the Afro-Asiatic family. (Scacchi et al. 2003)
