Industrial hemp Cannabis cultivars and seeds with stable cannabinoid profiles

A method of introducing a desired trait into hemp Cannabis cultivars NWG331 or NWG452 wherein the method comprises:

• a) crossing a NWG331 or NWG452 plant grown from NWG331 or NWG452 seed, wherein a representative sample of seed was deposited under Accession No. NCIMB 43290 or NCIMB 43280, with a plant of another Cannabis cultivar that comprises a desired trait to produce F1 progeny plants, wherein the desired trait is selected from the group consisting of altered terpene or cannabinoid composition, male sterility, herbicide resistance, insect resistance, and resistance to bacterial disease, fungal disease, or viral disease;
• b) selecting one or more progeny plants that have the desired trait to produce selected progeny plants;
• c) crossing the selected progeny plants with the NWG331 or NWG452 plants to produce backcross progeny plants;
• d) selecting for backcross progeny plants that have the desired trait and all of the characteristics of hemp Cannabis cultivars NWG331 or NWG452 listed in Table 1 or Table 3 to produce selected backcross progeny plants;
• and
• e) repeating steps (c) and (d) three or more times in succession to produce selected fourth or higher backcross progeny plants that comprise the desired trait and all of the characteristics of hemp Cannabis cultivars NWG331 or NWG452 listed in Table 1 or Table 3.