Bear in mind these are names that don't necessarily correspond with strains per se.
The name Sheelavathi afaik is used to refer to the landrace-modern hybrid crosses used by "ganja mafia" groups. Certainly, Sheelavathi offerings from these IG guys have not been pure landraces. I can see that, and people I know who've grown them can confirm it.
To what extent Orissa has been affected by hybrids, I don't know. I'd expect it is still relatively easy to find authentic landraces there.
But I'd intepret "Orissa Gold" to mean good ganja from Orissa, rather than there being a definite strain called Orissa Gold.
The impression I get is that most of the Indian IG "strain hunter" guys don't have a great understanding of the plant. That's not a problem if you want to get seeds off them. But I'd take more or less all information from them with a big pinch of salt.
A couple of says ago I was reading one such account talking about how many "cultivars" there are in Kerala. Others claim the Idukki landrace has vanished. More likely what you have in Kerala is the basic Idukki landrace with variations upon that theme.
Differences in the end product (i.e., bud) are explained by variation, terroir, and how well the ganja has been cultivated and prepared. Clearly, eradication will have taken its toll on diversity. But the main reason for the decline in quality in Kerala is that farmers are forced to harvest early. People cut closer to 5 months rather than the 6 or more they would have done. Plus, the active role farmers need to take in selecting for quality has obviously gone down the pan since the '80s.
That said, there's absolutely nothing stopping people growing and working these genetics back toward their full potential. Even in a couple of packs you are very likely to find standout plants in a good ganja Sativa, i.e. mid to high double-digit THC etc.
If you tried them once you will find a very unique effect typical of this area. Terpenes will be very non modern and even somebody who is not an expert will say this doesnt smell like I used to think weed smells...Recently
I have seen many Indian "companies" of landraces that sell seeds for very high prices seeds that in my opinion are not worked
do you think there is a possibility that they are offering hybrids?
how to know if they really are landraces from India?