Correlations among morphological and biochemical traits in high‐cannabidiol hemp (Cannabis sativa L.)

Abstract

Cannabis sativa is cultivated for multiple uses including the production of cannabinoids. In developing improved production systems for high-cannabinoid cultivars, scientists and cultivators must consider the optimization of complex and interacting sets of morphological, phenological, and biochemical traits, which have historically been shaped by natural and anthropogenic selection. Determining factors that modulate cannabinoid variation within and among genotypes is fundamental to developing efficient production systems and understanding the ecological significance of cannabinoids. Thirty-two high-cannabinoid hemp cultivars were characterized for traits including flowering date and shoot-tip cannabinoid concentration. Additionally, a set of plant architecture traits, as well as wet, dry, and stripped inflorescence biomass were measured at harvest. One plant per plot was partitioned post-harvest to quantify intra-plant variation in inflorescence biomass production and cannabinoid concentration. Some cultivars showed intra-plant variation in cannabinoid concentration, while many had a consistent concentration regardless of canopy position. There was both intra-and inter-cultivar variation in architecture that correlated with intra-plant

Microbiome Diversity and Variations in Industrial Hemp Genotypes

“…Selective breeding and cultivation practices have also played a signi cant role in the diversity of hemp genotypes 9 . Industrial hemp has been selectively bred for desirable traits such as ber quality, seed yield, oil content, and psychoactive properties, leading to different phenotypes and chemotypes [10][11][12][13] . Despite technological advances in Cannabis breeding, the proportion of (CBD) and THC uctuates greatly depending on the gender (male or female), genotypes, cultivation practices, and biotic or abiotic stresses.…”