Chemotype genetics-true
Chemotype
Type I
THC-dominant
Chemotype — the cannabinoid and terpene profile — is the lab-verifiable signal that stays true to a cultivar’s genetics, which is why scientists classify cannabis by chemical profile (a “chemovar”) rather than by name (Hazekamp & Fischedick 2012). Cannabinoid type is set largely by a single gene (the THC:CBD ratio); about 96% of commercial flower is Type I, THC-dominant. Terpene profiles are sourced from Certificates of Analysis (COA) and roll out as Areto’s lab-verified data comes online.
Indica / Sativa — retail shopping guide
Indica, sativa and hybrid are a retail shopping convention — not a reliable guide to genetics or effects. When researchers analysed 89,923 commercial samples across six states, these labels did not predict a plant’s terpene or cannabinoid profile, and a genome-wide study found sativa- and indica-labelled plants to be genetically indistinct (PLOS ONE 2022; Nature Plants 2021). The labels are so fluid that AK-47, a hybrid, won “Best Sativa” at the 1999 Cannabis Cup and “Best Indica” four years later. For an accurate, genetics-true picture, see the chemotype above.
Genetics & Lineage
Parents
This strainSR71
Descendants (1)
Effects
Aroma & Taste
Aroma
Breeder releases (1)
About SR71
SR71 by Purple City Genetics is a feminized, indica-dominant hybrid that merges classic OG heritage with cutting-edge US breeding. Created from Oaksterdam OG x Street Guru, this cultivar delivers vigorous growth, impressive yields, and an exceptionally loud terpene profile. With a fast flowering time of just 8–9 weeks, SR71 develops into stable, high-performing plants that thrive both indoors and outdoors.
Designed for growers seeking dependable, production-focused genetics, SR71 stands out for its strong structure and consistent results. Aromatically, it leans heavily into bold, gassy notes layered with earthy undertones, rubbery funk, and sweet biscuit-like dough nuances—hallmarks of modern American cultivars. With THC levels reaching around 25%, it offers both potency and a rich, complex flavor experience. Lineage: Oaksterdam OG x Street Guru Genetics: Mostly Indica Flowering Time: 8–9 weeks Aroma: Gas, rubber, biscuits, dough THC: Up to 25%
Frequently asked questions
What are the genetics of SR71?
SR71 comes from Bubbashine × Oaksterdam Kush.
Is SR71 indica or sativa?
SR71 is classified as indica dominant.
How much THC does SR71 have?
Across breeder releases, SR71 tests around 22% THC.
How long does SR71 take to flower?
SR71 flowers in about 60 days.
Is SR71 available as feminized or autoflowering seeds?
SR71 is offered as: feminized.