Wild cannabis, also known as ditchweed, is a common type of naturally-growing cannabis that grows mainly in the United States. Ditchweed refers to a type of marijuana that grows wild , scattered without having been planted, fertilized, or tended to.
What Is Ditchweed?
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Ditchweed is thought to have spread from previously planted hemp back in the day. Since it hasn’t been consciously planted, it doesn’t have the high resin content of commercially-grown weed.
“I would like to see a much larger study with a larger sampling,” he said.
Luca Fumagalli, an author of the study and a biologist in Switzerland who specializes in conservation genetics, said the theory of a Central Asian origin was largely based on observational data of wild samples in that region.
Michael Purugganan, a professor of biology at New York University who read the study, said the usual assumption about early humans was that they domesticated plants for food.
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Dr. Fumagalli and his colleagues then extracted genomic DNA from the samples and sequenced them in a lab in Switzerland. They also downloaded and reanalyzed sequencing data from 28 other samples. The results showed that the wild varieties they analyzed were in fact “historical escapes from domesticated forms,” and that existing strains in China — cultivated and wild — were their closest descendants of the ancestral gene pool.
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By sequencing genetic samples of the plant, they found that the species had most likely been domesticated by the early Neolithic period. They said their conclusion was supported by pottery and other archaeological evidence from the same period that was discovered in present-day China, Japan and Taiwan.