Blood type frequencies in India

Update:

It wasn’t until after this article was finished, that Kerala was brought to my attention for high rhesus negative frequencies. Sure enough, a 2017 study indicates, that in Thiruvanathapuram, Kerala, 9.52% of the people tested turned out to be rhesus negative. That would make this the region with the highest percentages of rhesus negatives in India.

Original article:

India is so genetically diverse, it deserves a post of its own. A new post that is with more detail.

Again, I am looking at a chart of D negative gene frequencies:

Let’s go straight to the interesting parts:
The Chenchus are Adivasi, a designated Scheduled Tribe in the Indian states of Andhra Pradesh, Telangana, Karnataka and Odisha. They are an aboriginal tribe whose traditional way of life has been based on hunting and gathering.
Their D negative gene frequency is 0.072 which makes the percentage of the Chenchu in Southern India only 0.5184% rh negative.
This of course is extremely low. The Kapol Vania in Bombay on the other hand were recorded as 8.5% rh negative.
You get the point. India is extremely diverse genetically and that is reflected in the variation of blood type frequencies as well.
The Sikhs in Northern India show even higher frequencies with around 9%.
Other groups and their rh negative frequencies in India:
Bhangi Harijane 1%
Cutchi Lohana 4%
Audichya Brahmans 9.5% (highest score)
Leva Patidars 8.5%
Tulavia Dubla 1.9%

South Gujarat 4.87%

A national average of rh negatives to determine a national frequency has not been determined.

Sources include:

Prevalence of ABO and Rhesus Blood Groups in Blood Donors: A Study from A Tertiary Care Centre in South Kerala