Research:2026-02-09/Preprint/ancestry-and-environmental-adaptation-in-north-american-feral-cannabis
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Ancestry and Environmental Adaptation in North American Feral Cannabis
bioRxiv
A preprint combining three georeferenced Cannabis datasets, 909 samples of North American feral populations and Eurasian material, to study population structure and adaptation to climate. A phylogeny rooted on Humulus lupulus places the North American feral populations closer to basal and hemp-type lineages than to drug-type or Iranian ones. Environmental genomic selection and genome-environment association recovered replicated temperature- and precipitation-associated loci, and populations in Indiana and New York show signatures of adaptation to wetter, cooler conditions. The authors conclude that feral and landrace populations hold substantial adaptive variation for climate-resilient breeding. Version 1 was posted without peer review.
CountryUnited States