IMHO..Kaotic is the closest. For me, I grow pretty much nothing but Chemdawg 91' and different OG's. IMO, the OG is definitely from the original Chemdawg '91. I have grown Chem for years and depending on room temp and pruning techniques, you can get her to produce Very long Sativa diesel tasting herb, or a way tighter nug "OG Kush" looking and tasting herb...not too much tasting like true OG, but you can catch the flav for sure.
Mind you, there is a big difference in a true "OG Kush" plant from the Chem, as far as bud is concerned, but the structure of the plant is damn near identical. From clone to 3 weeks into 12/12, it is damn hard to tell. Once she starts pushing, you can tell immediately.
It is not like a true "Kush" at all, no indica traits at all, except maybe fatter leaves then a traditional sativa.
So, the story I believe the most is the most is the one that follows. Heard it many times from trusted sources.
History of the Chemdawg Family, including Diesel and OG Kush
History of the Chemdawg Family
At a Grateful Dead show at Deer Creek Amphitheatre, 'joebrand' (aka 'wonkanobe') and 'pbud' met 'chemdog' and sold him an ounce of very high quality pot for $500. joe and chemdog exchanged numbers and they later arranged for two ounces to be shipped to chemdog on the east coast. According to chemdog, one ounce was seedless and the other had 13 seeds.
In ’91, chemdog popped the first 4 seeds. From these seeds, one male was found and disposed of (chemdog was young, you can’t blame him). The 3 females were labeled ‘chemdawg’ (now ’91 chemdawg), ‘chemdawg a’ (now chemdawg’s sister), and ‘chemdawg b’. In '01, chemdog and his girlfriend attempted to germ 3 more seeds, labeled ‘c’, ‘d’, and ‘e’. the ‘e’ seed never germinated, ‘c’ turned out to be junk (according to chemdog), and chemdawg ‘d’ was the keeper. In '06, 'chemdog' and 'joebrand' reunited and joe was given 4 of the last 6 beans: Chemdawg phenos 1-4, '4' being the chosen keeper. Joe thought the '4' was the best representation of the original and thus dubbed it the 'reunion pheno'. Chemdog still has two seeds left in his stash.
Chemdawg Crosses:
• 'OG Kush' (the original cut) came from an s1 seed from a bag of '91 Chemdawg in the Lake Tahoe area in 1996.
• 'Sour Diesel' aka ECSD came from an accidental cross of ('91 Chemdawg x Mass Super Skunk/NL)x DNL after the DNL hermed and seeded the room. The DNL's lineage is NL/Shiva x Hawaiian.
• Original Diesel' (also known as Diesel #1, Headband, Daywrecker Diesel, Underdawg) came from a cross of '91 Chemdawg x (Mass Super Skunk x Sensi's Northern Lights) done by a guy known as ‘weasel’.