Genotypic Testing

Genotypic testing refers to laboratory analysis of a cannabis plant's DNA to identify its genetic markers and ancestry. Unlike phenotypic observation (which examines visible traits), genotypic testing uses molecular techniques to map strain lineage, verify genetic purity, and detect genetic markers associated with specific cannabinoid or terpene profiles. This methodology has become standard in regulated breeding programs for documenting cultivar authenticity and predicting offspring characteristics. Genotypic data helps breeders make informed crosses by understanding the underlying genetic architecture rather than relying solely on observed traits. Testing may reveal recessive genes, heterozygosity levels, and genetic distance between parent plants—critical information for stabilizing new lines or maintaining seed stock integrity.

Breeders use genotypic testing to accelerate selection cycles, verify parental identity before crosses, and document trait heritability. The technique enables data-driven breeding decisions that reduce trial-and-error approaches, particularly when developing stable F1 hybrids or IBL (inbred line) cultivars.