Trait Suppression

Trait suppression refers to genetic mechanisms where certain alleles or gene expressions are inhibited or masked by dominant factors, preventing expected phenotypic traits from manifesting visibly in offspring. In cannabis breeding, this phenomenon is documented when plants carrying recessive genes for color, terpene profiles, or morphology fail to express those traits due to epistatic interactions or dominant alleles. Breeders working in controlled crosses often encounter trait suppression when attempting to stabilize specific characteristics across generations. Understanding suppression patterns helps explain why offspring sometimes diverge from predicted Mendelian ratios. This is distinct from simple recessive inheritance and requires careful phenotypic tracking across multiple generations to identify underlying genetic architecture.

Breeders document trait suppression patterns to predict offspring stability and identify which genes require homozygosity for expression. Recognition of suppression mechanisms informs selection strategies when attempting to isolate or combine multiple recessive traits in a single line.