Genotype Markers

Genotype markers are genetic identifiers—specific DNA sequences or polymorphisms—used in cannabis breeding and seed identification to trace lineage, verify strain authenticity, and select for desired traits. Unlike terpenes, which are aromatic compounds, genotype markers operate at the molecular level and are invisible to sensory evaluation. Breeders and seed banks employ genotype markers to document parent plants, confirm hybrid crosses, and maintain strain purity across generations. These markers can identify genetic diversity within a population and help predict offspring phenotypic variation. Common marker types include microsatellites (SSRs), SNPs, and other nuclear DNA sequences that remain stable across plant life cycles.

Breeders use genotype markers to accelerate selective breeding, confirm successful crosses, and build reliable seed stocks for commercial or research purposes. Marker-assisted selection (MAS) allows breeders to identify desirable genetic traits in seedlings before phenotypic expression, reducing time and resources spent on unwanted phenotypes.