Showing posts with label News And Information. Show all posts
Showing posts with label News And Information. Show all posts
Tuesday, December 6, 2011
Saturday, December 3, 2011
Indian Muslim population shows genetic affinity with non-Muslim Indian Geographic Neighbours
A 2009 study by India's National DNA Analysis Centre shows Indian Muslims display a genetic affinity with their neighbouring Non-Muslim populations along with low levels of Arabian, Central Asian and Iranian admixture. The study sampled 431 Indian Muslims from Uttar Pradesh, Gujarat, Andhra Pradesh and Tamil Nadu. The results showed distinctions between the Muslim communities based on geographic origins and a greater affinity to their neighbouring non-muslims than to each other. However, the study also does note a contribution to the genetic structure of Indian Muslims coming from Iranian and Arabian populaitons. The study does show some distinctive Y-DNA haplogroup frequencies especially in Haplogroup J:

Most noteworthy were the J2, J2a and JxJ2 frequencies of the Indian Shia population which were substantially higher than those of Indian Non-Muslims.
The spread of Islam in India was predominantly cultural conversion association with minor but still detectable levels of gene flow from outside, primarily from Iran and Central Asia, rather than directly from the Arabian Peninsula.
Most noteworthy were the J2, J2a and JxJ2 frequencies of the Indian Shia population which were substantially higher than those of Indian Non-Muslims.
The spread of Islam in India was predominantly cultural conversion association with minor but still detectable levels of gene flow from outside, primarily from Iran and Central Asia, rather than directly from the Arabian Peninsula.
Thursday, December 1, 2011
The coming of the Greeks to Provence and Corsica
Wednesday, November 30, 2011
Article Neolithic Patrilineal Signals on the Armenian Plateau
Article Neolithic Patrilineal Signals on the Armenian Plateau
A recently released study on the Y-Chromosomes of Armenians from four distinct regions, the Ararat Valley, Gardman, Lake Van and Sasun shows a predominence of the J2-M172 haplogroup, combined with R1b, G2 and E1b1c1. The paper indicates settlement and population expansion dating back to the neolithic. This study , undertaken by Herrera, Underhill, Regueiro and others, recorded frequencies, calculated variance and compared these figures with neighbouring populations in an attempt to understand the migrations of the most frequent haplogroups observed within a neolithic context.
Frequencies of J2-M172 were very high, at 30% in the Gardman Region of present day Azerbaijan and 29% in the Lake Van region of eastern Turkey. J2a-M410(xM67) was the most frequent haplogroup subclade observed. A single P279 haplotype (J2a3), an extremely rare sublcade of J2 was also observed. Haplotype diversity, often used to determine the age of a particular haplogroup, was highest in neighbouring Palestine, followed by Crete, Syria, Greece and Lebanon. These figures, the authors suggest, could be indicative of an arrival of J2 chromosomes to the Armenian Plateau from the Levant possibly coinciding with the expansion of Agriculture.

The data observed in the Armenian Plateau, while carrying frequencies of Haplogroup J2 common in other areas of the Middle East, showed a much higher level of R1b, a correlation not observed in neighbouring populations like Iran, Iraq and the Levant. The authors suggest both R1b and J2, combined with other haplogroups E1b1b1-M35 and G2a are all indicative of Neolithic expansions and migrations. Yet R1b stands out from this group as it shows a very different frequency and spread from J, E and G haplogroups, which are much more frequent in the Fertile Crescent.
A recently released study on the Y-Chromosomes of Armenians from four distinct regions, the Ararat Valley, Gardman, Lake Van and Sasun shows a predominence of the J2-M172 haplogroup, combined with R1b, G2 and E1b1c1. The paper indicates settlement and population expansion dating back to the neolithic. This study , undertaken by Herrera, Underhill, Regueiro and others, recorded frequencies, calculated variance and compared these figures with neighbouring populations in an attempt to understand the migrations of the most frequent haplogroups observed within a neolithic context.
Frequencies of J2-M172 were very high, at 30% in the Gardman Region of present day Azerbaijan and 29% in the Lake Van region of eastern Turkey. J2a-M410(xM67) was the most frequent haplogroup subclade observed. A single P279 haplotype (J2a3), an extremely rare sublcade of J2 was also observed. Haplotype diversity, often used to determine the age of a particular haplogroup, was highest in neighbouring Palestine, followed by Crete, Syria, Greece and Lebanon. These figures, the authors suggest, could be indicative of an arrival of J2 chromosomes to the Armenian Plateau from the Levant possibly coinciding with the expansion of Agriculture.
The data observed in the Armenian Plateau, while carrying frequencies of Haplogroup J2 common in other areas of the Middle East, showed a much higher level of R1b, a correlation not observed in neighbouring populations like Iran, Iraq and the Levant. The authors suggest both R1b and J2, combined with other haplogroups E1b1b1-M35 and G2a are all indicative of Neolithic expansions and migrations. Yet R1b stands out from this group as it shows a very different frequency and spread from J, E and G haplogroups, which are much more frequent in the Fertile Crescent.


