Razib Khan One-stop-shopping for all of my content

July 3, 2011

Pathan parahistory

Filed under: Genomics,History,Pathans,South Asian genomics,Turks — Razib Khan @ 12:41 pm


Mughal Emperor Akbar

In Strange Parallels Victor Lieberman made a reference to “Turkicized Pathans.” The very term has been gnawing at me. To get some sense of the context, Lieberman was sketching out the impact of Islamic civilization upon Indian civilization. Sometimes this “impact” was very literal. The Arab armies had rolled into Sindh in the 8th century, but that influence upon India was militarily marginal. The first real Muslim raider of consequence was Mahmud of Ghazni, a Turkic raider from what is today Afghanistan, who famously plundered the palaces and temples of North India circa ~1000. But even here the the impact is arguably superficial. Mahmud of Ghazni’s raids did not lead to a large Indian domain under his direct rule except in Punjab. Rather, these sallies into India were sources of supplementation to his broader fiscal resources. He was still fundamentally a Central Asian potentate fixated on Central Asian concerns. The real rise of Islamic civilization in India was precipitated by the Delhi Sultanate, a series of short-lived polities beginning circa ~1200 which dominated ...

March 12, 2011

Harappa Ancestry Project @ N ~ 50

Zack Ajmal now has over 50 participants in the Harappa Ancestry Project. This does not include the Pakistani populations in the HGDP, the HapMap Gujaratis, the Indians from the SVGP. Nevertheless, all these samples still barely cover vast heart of South Asia, the Indo-Gangetic plain. Here is the provenance of the submitted samples Zack has so far:

Punjab: 7 Iran: 7 Tamil: 6 Bengal: 5 Andhra Pradesh: 2 Bihar: 2 Karnataka: 2 Caribbean Indian: 2 Kashmir: 2 Uttar Pradesh: 2 Sri Lankan: 2 Kerala: 2 Iraqi Arab: 2 Anglo-Indian: 1 Roma: 1 Goa: 1 Rajasthan: 1 Baloch: 1 Unknown: 1 Egyptian/Iraqi Jew: 1 Maharashtra: 1

Again, note the underrepresentation of two of India’s most populous states, Uttar Pradesh, ~200 million, and Bihar, ~100 million. Nevertheless, there are already some interesting yields from the project. Below I’ve reedited Zack’s static images (though go to his website for something more dynamic) with the labels of individuals. I’ve highlighted myself and my parents with the red pointers.

To the left is a set of plots and tables which I’ve spliced together from Zack’s various posts. What you need to know is that this at K = 12, and I’ve used the labels that Zack gave the various putative “ancestral populations” which emerged out ...

January 28, 2011

Harappa Ancestry Project, before the first wave

Zack has been posting his data sources, as well as how he filtered and formatted them, all this week. I assume that the first wave of results will be online soon. As of yesterday, this is what he had (I know he got some more today):

- Punjab 7
- Bengal 1
- Bihar 1
- Tamil 5
- Karnataka 1
- Anglo-Indian 1
- Roma 1
- Iran 3

Whole swaths of north-central India are missing. I am hopeful that more people will join in after the first wave of results are put out there. But, from what I have discussed with Zack it looks plausible that the very first wave will have a richer set of results because of the necessity of preliminary steps. So there’s some benefit in getting early. It’s really ridiculous to have literally 1 sample representing the 300 million people of Uttar Pradesh and Bihar. That’s 25% of South Asians represent by one person. I’ve gotten a commitment from one friend who was born U.P. to give his data up once it comes in, but there have to be others out there. (the Bengali N should go up to 2 when I swap my parents ...

Harappa Ancestry Project, before the first wave

Zack has been posting his data sources, as well as how he filtered and formatted them, all this week. I assume that the first wave of results will be online soon. As of yesterday, this is what he had (I know he got some more today):

- Punjab 7
- Bengal 1
- Bihar 1
- Tamil 5
- Karnataka 1
- Anglo-Indian 1
- Roma 1
- Iran 3

Whole swaths of north-central India are missing. I am hopeful that more people will join in after the first wave of results are put out there. But, from what I have discussed with Zack it looks plausible that the very first wave will have a richer set of results because of the necessity of preliminary steps. So there’s some benefit in getting early. It’s really ridiculous to have literally 1 sample representing the 300 million people of Uttar Pradesh and Bihar. That’s 25% of South Asians represented by one person. I’ve gotten a commitment from one friend who was born U.P. to give his data up once it comes in, but there have to be others out there. (the Bengali N should go up to 2 when I swap my parents ...

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