Phenotypic Vigor Traits

Phenotypic vigor traits refer to observable characteristics that indicate robust plant growth and resilience, often influenced by genetic background and environmental conditions. In cannabis breeding, vigor markers—such as thick stems, rapid internodal spacing, and dense root development—are frequently documented across lineages and used as selection criteria. These traits are distinct from terpene profiles themselves but are commonly associated with the overall health expression of vigorous cultivars. Breeders working in this category often track vigor across generations to maintain or enhance plant performance. While vigor traits don't directly define cannabinoid or terpene content, they influence cultivation efficiency and yield potential in controlled environments.

Breeders prioritize phenotypic vigor traits when selecting parent plants for crossing programs, as strong vigor can indicate genetic stability and adaptability. Vigor markers are used as non-chemical selection tools early in phenotyping, helping identify elite stock before full terpene and cannabinoid profiling.