هنا دراسة الموقع الأوروبي العلمي المعروف Eupedia للسلالة T علماً بأن آخر تحديث للصفحة هو شهر 3 من هذا العام 2013
T is a rare haplogroup in Europe. It makes up 1% of the population on most of the continent, except in Greece, Macedonia and Italy where it exceeds 4%, and in Iberia where it reaches 2.5%, peaking at 10% in Cadiz and over 15% in Ibiza. The maximal worldwide frequency for haplogroup T is observed in East Africa (Eritrea, Ethiopia, Somalia, Kenya, Tanzania) and in the Middle East (especially the Caucasus, South Iraq, Southwest Iran, Oman and South Egypt), where it accounts for approximately 5 to 15% of the male lineages. Besides these regions and Europe, T is found in isolated pockets as far as Central Asia, India, Cameroon, Zambia and South Africa. Its highest density is actually found among the Fulbe people of Cameroon (18% of the population).
Haplogroup T originated at least 30,000 years ago, making it one of the oldest haplogroups found in Eurasia, which may explain its vast dispersal around Africa and South Asia. It also makes its place of origin uncertain. The modern distribution T in Europe strongly correlates with a the Neolithic colonisation of the continent by Middle Eastern farmers, who also included members of haplogroups E1b1b, G2a, J1 and J2. The hotspot in Estonia is very likely due to a founder effect in the Neolithic population.
Although haplogroup T is more common today in East Africa than anywhere else, its association with the rise of agriculture in the Middle East is a strong argument in favour of a Middle Eastern origin, and a colonisation of East Africa by Middle Eastern farmers. Another argument in that sense is that T is descended from haplogroup K, which is itself absent from Africa and spawned most of the Eurasian haplogroups (L, N, O, P, Q, R and T), which are thought to have a common origin around Central Asia. The strong incidence of T from the Caucasus to central and southern Iran hint that early farmers might have descended from the Caucasus to southern Mesopotamia and southwest Iran. T might therefore be linked to the ancient Sumerians and Elamites.
The higher than average frequencies of haplogroup T in places like Cyprus, Sicily, Tunisia, Ibiza, Andalusia and the northern tip of Morocco suggest that some of the haplogroup T can be attributed to the Phoenicians colonisation (1200-800 BCE), and that ancient Phoenicia seemingly had a higher incidence of T than Lebanon does today.
The testing of Thomas Jefferson's DNA revealed that the US president belonged to haplogroup T.
رابط المصدر
http://www.eupedia.com/europe/origin...europe.shtml#T
hgsghgm T td hgl,ru hgH,v,fd Eupedia
السلالة T في الموقع الأوروبي Eupedia
رد مع اقتباس
مواقع النشر (المفضلة)