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

August 1, 2011

~33% of a Malagasy genotype, first pass

Last week I begged for a Malagasy genotype. I didn’t quite get that, but I got the second best thing: a part Malagasy-genotype. I decided to take it for a spin.

But first some preliminaries. Here’s what we know about this individual (or what this individual knows):

- 25% French (paternal grandfather)
- 18.75% West African? 6.25% French? (paternal grandmother French Antilles)
- 19% Indian Muslim Bohras from Bombay + 6.25% Malagas, Sakalava tribe, royal family of Mahajanga (maternal grand -father)
- 25% Malagasy (Sakalava, maternal grandmother mtDNA haplogroup M23)

This is a very mixed individual in terms of ancestry. As for the Malagasy people, we know both a lot and a little about them. They’re a hybrid population, more or less, of Austronesians with a very close connection to the to the Dayaks of southern Borneo. I have hypothesized that these Austronesians were part of a circum-Indian ocean trading network which was marginalized by the rise of Islam in the second half of the first millennium. Such an early date would explain why the Malagasy seem to have been only lightly touched by Indic cultural influences, let alone Islamic ones. There is also the African component to their ancestry, which ...

July 28, 2011

Quest for the Malagasy genotype

I would like to throw out the word that I am looking for a person with Malagasy ancestry for the African Ancestry Project. To my knowledge there are no thick marker autosomal analyses of the Malagasy people. After my recent exploration of Southeast Asian genetics I think even one individual would be highly informative.

As usual I would guarantee that these data are entirely private, and I do not share it with anyone. But in this case I would like to make an exception and stipulate that Joseph K. Pickrell, a graduate student at the University of Chicago, would also be very interested in access to a Malagasy genotype for the purposes of research. Since this is an undersampled population the marginal returns to a Malagasy genotype would be enormous for science, a public good rather than just a private gain.

Also, I am still looking for a Tutsi genotype so that I can ascertain the origin of this population.

Please contact me at africanancestryproject -at- gmail -dot- com.

Je recherche une personne d’origine malgache dans le cadre du projet “l’African Ancestry Project”.

A ma connaissance, il n’existe à ce jour aucune analyse des marqueurs autosomiques du peuple malgache. ...

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