Marijuana Botany came out in 1981. Right around the time the first genomics company was founded. I wouldn’t use that as any reference to genetics. Just what it says really doesn’t even make sense.
“a pair of genes are equal in their effect upon phenotype.” Most of the plants will have similar genes in a population but express differently based on a lot of things that they didn’t even know at the time (epigenetics.) It is a bro science book… Don’t get me wrong, I admire and like the author and think he is one of the best but it is still bro science… “handed down history.”
There’s a ton of modern research now into cannabis genetics and at least 15 genomes have been sequenced. If you want to get into it then i’m sure you could find the genes that express certain things but that is in its early stages.Check out this thread…
and this