Akar Nusa
Why a haplogroup is not a nationality
Imagine two friends comparing their family-line stories on a phone. Both are told they carry the same father-line branch. One is Malay, one is Chinese. They look at each other and laugh. How can that be?
The story
A haplogroup is a branch of a very old family tree. Branches are thousands of years old. In that time people moved, married, settled and mixed. So the same branch can sit in many peoples today.
Scientists who study ancestry say this clearly. Mathieson and Scally (2020) point out that most statements about "ancestry" are really statements about genetic similarity. Similarity is a good clue, but it is not a family tree. They also warn that such labels can push today's political and cultural divisions back onto the past, and that clusters are often named after the present-day people they most resemble. That can fool people into thinking the cluster was once a country or a race.
Pickrell and Reich (2014) add that long-distance migration, mixing and population replacement have changed the genetic map of most of the world since people first left Africa. Where a person's relatives live now is not a simple guide to where their ancestors lived.
Our own region shows how this works. The mother line B4 is called "The seafarers' line" in our family-line stories. It grew in southern China and spread to Taiwan, the Philippines and Indonesia, and out into the Pacific. A study of mother-line DNA in island Southeast Asia (Hill and colleagues, 2007) found great diversity, with lines that arrived at different times. So one branch can be carried by families of several peoples. The branch does not belong to any one of them. It is part of a story they share.
Where you can still see it today
- In your family-line story: it says "this line grew in" or "likely spread to", not "you are".
- In Malaysia's mix of peoples, where a shared branch of the tree can sit in neighbouring families of different languages and faiths.
- In the words scientists use: "likely", "may", "most common", because a line shows where a branch was common, not where a person belongs.
What DNA can tell, and what it cannot
A haplogroup can tell you that one thread of your family, going back far in time, belongs to a branch that was common in a certain part of the world.
It cannot give you a nationality, a race, a religion, a language or a place on a map. It cannot say who is "really" from where. As Mathieson and Scally put it, whether DNA shapes a cultural or ethnic identity is entirely a matter for the individuals and groups concerned.
DNA does not decide race, religion or bumiputera status. These come from family, law, faith and culture. A DNA result is a clue to the deep past, and one more thing to be curious about.
