Drying Your Grow: the science !

[nitram]

There is little doubt that environmental factors have a strong influence in modulating the amount of cannabinoids present in the different parts of the plants at different growth stages, as demonstrated by a number of articles (e.g., LYDON et al. 1987 Down; BOCSA et al. 1997 Down). However, the tripartite distribution of CBD/THC ratios in most populations is likely to underlie a discrete inheritance of the chemotype trait. Indeed, most authors agree that cannabinoid profiles are under strong genetic control. According to BEUTLER and DER MANDEROSIAN 1978 Down, the ratio of CBD/THC is a chemical marker of taxonomic significance. FOURNIER et al. 1987 Down stated that the cannabinoid profile of each plant—and therefore its CBD/THC ratio—is chiefly dependent on its genetic background and that each individual plant invariably belongs to its distinct chemical group throughout its life cycle.

 

Quantitative and qualitative aspects of cannabinoid accumulation are often confused as pointed out by HILLIG 2002 Down in a critical comment on SYTNIK and STELMAH 1999 Down. To specify the target of the current article it is adequate to express the yield of a certain cannabinoid per crop area unit as a complex trait,

 

(1) GO TO ARTICAL FOR TIS FOURMULA BELLOW

 

where CYn is the yield of cannabinoid, n (grams per square meter); DM is the total amount of dry, above-ground biomass (grams per square meter); Pflor is the weight proportion of inflorescence leaves and bracts (grams per gram); Ctot is the total cannabinoid content in the inflorescence leaves and bract fraction (grams per gram); and PCn is "purity," the proportion of cannabinoid n in the total cannabinoid fraction (grams per gram).

 

 

Source

 

Check out the range of jornal aritials

Edited May 28, 2007 by nitram

[nitram]

This study aims to clarify the inheritance of cannabinoid chemotype, by isolating pure CBD and pure THC inbred lines. A simple inheritance model was proposed after making crosses between the chemotypically contrasting lines and examining a number of F1 and F2 progenies. An RAPD analysis of the parental lines and their offspring was performed and a number of chemotype-associated markers were described.

 

Now that is a cntrolled studySource

[MongyMan]

Thanks nit that was an interesting read mate. I have always belived that genetics has more of a hand to play in potency than environmental factors myself, so far as, you cant ever grow good smoko from crap genetics no matter how good a season or the environment is. The genetics need to be there first.

 

I'd like to see the leaves of plants that only produced THC or CBD, I wonder if there are obvious differences.

 

MongyMan