Seed Dominance Traits

Seed dominance traits refer to the genetic expression patterns that determine which parental characteristics manifest in offspring when heterozygous alleles are present. In cannabis breeding, dominant traits typically express in first-generation (F1) crosses, while recessive traits require homozygous pairing to appear phenotypically. Understanding dominance hierarchies is fundamental to predictable breeding outcomes, as breeders use Mendelian principles to anticipate whether offspring will display traits from one parent, both parents, or intermediate expressions. Common seed dominance categories include morphology (plant structure, leaf shape), flowering time expressions, and resin production levels. Dominance patterns can be complete (one trait fully masks the other) or incomplete (blended expression), and their reliability varies depending on the genetic background and number of genes

Breeders leverage dominance trait knowledge to stabilize desired characteristics across generations and to predict F1 hybrid vigor or segregation patterns in backcrosses. By mapping which traits breed true versus which require careful selection, cultivators working in structured breeding programs can design crosses that reliably produce specific phenotypes in commercial seed lines.