.: Pure-breds Traditional land races that have only interbred with similar strains and so have almost identical genes.

.: Stabilized Hybrids Hybrids that have been created by breeders but then continually inbred until their characteristics are stabilized from generation to generation.

.: Very few strains are stabilized hybrids as this takes considerable time for breeders to achieve.

.: All true-breeding cannabis seed strains are therefore ideal for using as parent plants when creating new F1 cannabis hybrids.