“Cannabis is an interesting domesticated crop with a long history of cultivation and use. Strains have been selected through informal breeding programs with undisclosed parentage and criteria. The term “strain” refers to minor morphological differences and grower branding rather than distinct cultivated varieties.
The “sativa” and “indica” lineages used to describe cannabis throughout the industry are based on postulation that sativa strains originated from European hemp cultivars, while indica are from potent, resinous Indian cannabis but given the use and trade of the plant in ancient times, the exact origin is unknown and these may not be distinct species. Comparisons of cannabinoid contents of these classifications have shown that the THC content can be identical between these two classification groups.” https://www.nature.com/articles/s41598-018-31120-2
“THC amounts identical in most cannabis strains, study finds. Newly published research from UBC’s Okanagan campus has determined that many strains of cannabis have virtually identical levels of tetrahydrocannabinol (THC) and cannabidiol (CBD), despite their unique street names. The research shows that most strains, regardless of their origin or name, had the same amount of THC and CBD” https://phys.org/news/2018-10-thc-amounts-identical-cannabis-strains.html
“UBC Okanagan study: THC amounts identical in most cannabis strains. B.C. Kush. Platinum GSC. Blueberry Cookies. Blue Sapphire. Death Bubba. Oregon Golden Coat. Those are just some of the many, many types of marijuana available for purchase. Yet, according to newly published research from UBC Okanagan, many strains of cannabis have virtually identical levels of tetrahydrocannabinol (THC) and cannabidiol (CBD) despite their unique street names.” https://globalnews.ca/news/4533548/ubc-okanagan-study-thc-amounts-identical-in-most-cannabis-strains/