It is generally thought that cannabis genetics for the most part jive with Mendelian Genetics. There are other critical factors such as hermaphrodites, variable gene penetration and local growing factors that all playing a very important role in the final outcome of any plant – or person, for that matter.
So far, I can only see one plant “value” that seems quite constant from early weeks of vegetating all the way to bud formation and this is the cannabinoid ratios, at least for CBD and THC.
This alone is great to know. You don’t have to grow the plant all the way out to find out what it is likely to produce. Share this with a grower friend.
With all the various CBD rich strains I have seen over the past three or so years, they fall into two categories:
1. VERY high ratio – around 24:1
2. Modest ratio – from 1:1 to perhaps 3:1
3. There is nothing I have ever seen IN THE MIDDLE. i.e. no 10:1, or 15:1
So, how could this be? Well, we know CBD is a recessive gene and THC dominant. I believe it is reasonable to presume that the Modest ratio strains have a single genetic recessive gene for CBD and the VERY high ratio CBD plants have 2 recessive alleles.
Studies in the garden are being done now to further test this. For sure, there are lots and lots of both these extremes readily available in nature, but some of the best clinical ratios are in between and just require blending – at least for now.