Genetius

The study applied Environmental Genomic Selection to 149 Cannabis sativa samples, calculating Genomic Estimated Adaptive Values across bioclimatic variables to identify genetically adaptive traits linked to precipitation and seasonal climates. Distinct adaptive patterns were found among population groups, highlighting drug-type feral and basal groups as valuable sources of flood tolerance and broader environmental resilience for breeding climate‑resilient Cannabis varieties.

The study evaluated physiological, morphological, and cannabinoid traits of three hemp (Cannabis sativa) varieties grown in southwest Texas, measuring diurnal gas exchange, chlorophyll fluorescence, water potential, canopy temperature, and THC content via HPLC. Despite differing photosynthetic rates and stomatal efficiency among varieties, high temperatures had limited impact, rooting depth showed no physiological effect, and all varieties remained below the 0.3% THC threshold. Allometric equations were derived to predict difficult-to-measure traits from easily obtained biomass or morphological data.

A nationwide survey of 760 feral Cannabis sativa plants from twelve U.S. states used genotyping-by-sequencing, CBDAS gene assays, and GC‑MS to characterize genetic structure and cannabinoid composition. Analyses revealed five distinct genetic clusters and three cannabinoid chemotypes, with total cannabinoid content ranging from 0.21% to 4.73%, providing valuable germplasm for hemp breeding.

The study investigated how tightly controlled drought regimes affect biochemical, physiological, and anatomical traits of three THCA‑dominant Cannabis sativa cultivars. Drought reduced canopy conductance, inflorescence weight, and the concentrations of major phytocannabinoids (THCA, CBGA), while terpene levels varied genotype‑specifically, indicating that yield losses stem primarily from suppressed biosynthetic activity rather than metabolite degradation.