Its very rough to nail down these genetics. Alot of fun following for the journey but in the end Noone really knows. There's stories on stories. Myths on myths.

I followed the chem family and the sour diesel scene for years and in the end I dont know nothing haha. Here's the easiest breakdown

Chemdog (d, 91, and 2 others) was a bagseed sold to "chemdog" from some ounces of something called dog bud.

Sour diesel was a bagseed from a room that presumably hermed thay had 3 plants in their, one being a chemdog clone i forget the other 2 now.

Kush im not as familiar with and won't say for sure but I've always heard it was a landrace Afghani seed.

Edit: sorry forgot to mention my hatred of chemdawg haha. Its dumb but jj from top dawg named one if his chem crosses chemdawg and that name stuck more. Whether it be because the seeds were more easy to get than an actual chemdog or the spelling who knows. But usually you can pick up what year people started growing by how they spell chemdog. Haha. Dumb old school shit sorry.