RÉSUMÉLe cannabigérol (CBG) MOTS-CLÉS

This chapter presents the hemp's anatomy and morphology, together with its chemical composition and properties. It also details the particularities and specificities of the plant's vegetative cycle, which is consists of emergence, implantation (3 weeks after emerging from the ground), active growth, flowering, full flowering and end of flowering. Calculation of potential hurd yield of a hemp crop is briefly explained.

RESUMEacres. They aim at measuring the A-9-THC content, which is the psychotropic substance specific to hemp. The present standard value (A-9-THC < 0.2%) has been adopted and sample analysis protocols have been modified. The new method came into force in 2000 and substitutive for the pre¬ viously restrictive and tedious method which entailed the taking of numerous samples over a very short time period (at the end of the blossoming). However, the implementation of this new method has resulted in an increase of the mean A-9-THC content and of their variability. In this study a close correlation (R2>0.9) between A-9-THC content and A-9-THC/CBD ratio a was found for the all set of varieties (13) and germplasm (15) tested, a can then sub¬ stitute to the only determination of A-9-THC content, a also revealed to be constant what ever part of the plant was sam¬ pled or whenever it would be sampled. A sample composed of 100 plants guarant}' enough reliability of the results. The proposition was to sample one leaf of 100 plants at any

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RÉSUMÉ MOTS-CLÉS