Genetic drift in seed making.

[hank]

If I were to make my own Autoflower seeds from existing varieties How likely am I to see genetic drift? Do you believe most of these seed varieties are pretty well homogenized to where I won't see any genetic drift? This would mainly be pertaining to the CBD Autoflower varieties. My fear is that these seed banks have the parental stock and if I were to reversed I would lose what they offer. I know I would not lose the autoflower trait as it is recessive so that is locked but that other things could come out.
Thanks family

 

[Son of Hobbes]

@FullDuplex @Magic

 

[FullDuplex]

If I were to make my own Autoflower seeds from existing varieties How likely am I to see genetic drift? Do you believe most of these seed varieties are pretty well homogenized to where I won't see any genetic drift? This would mainly be pertaining to the CBD Autoflower varieties. My fear is that these seed banks have the parental stock and if I were to reversed I would lose what they offer. I know I would not lose the autoflower trait as it is recessive so that is locked but that other things could come out.
Thanks family

It depends on the cultivar. If its Familial and true IBL the drift wouldn't be far. Especially from a reg line. Even the fems past a certain point would have little drift if they've been worked past the selfing stage. I think that youd see drift in a new P1 x P2 especially if they have a diverse background. You could and will run into F1 hybrid vigor if introducing two new lines together and i believe youll see that in fem or reg.

 

[hank]

Ok I guess the only way to really know is to test. Not sure how stable some of these are and if the high CBD strains will keep the 20:1- 30:1 ratio or so of CBD:THC.

What do you all think would be the best or should I test all of them out. Goal is to move to larger scale

I have
Medikit - Buddha Seeds
Charlottes Angle -Dutch Passion
Candida CD1- Medical Marijuana Genetics
Pure CBD - Sweet Seeds
Deadlights - TGA Subcool

 

[hank]

So all the seeds are reg not autos however I am going to pick up some autos so any suggestions are well welcomed
Thanks family!!

 

[Magic]

If I were to make my own Autoflower seeds from existing varieties How likely am I to see genetic drift? Do you believe most of these seed varieties are pretty well homogenized to where I won't see any genetic drift? This would mainly be pertaining to the CBD Autoflower varieties. My fear is that these seed banks have the parental stock and if I were to reversed I would lose what they offer. I know I would not lose the autoflower trait as it is recessive so that is locked but that other things could come out.
Thanks family

Been listening to alot of experts in genetics, genetic drift is associated with cloned plants no as much seed. Genetic drift in seed is just plain instability. I'd test those autos, then make your crosses then test the offspring. If u do see numbers drifting away from your goal back cross back into one of your original parents of your CBD strain. If u want to fem I say go for it, There is no proof Feminization does anything to cannabis on a genetic level. Yeah it makes the plant release hormones that cause it to make fem pollen but no one has ever proved on a genetic level Feminization effects the chemotype of the strain its all personal bias. If u look at strains that have been geneticly mapped, a clone that originally came from seed, and a S1 made from that clone will test as the same strain.

 

[hank]

That's the plan to test several varieties, pollinate females with reverse females from the same type to see how they turn out. Probably two or three generations this will take some time and it won't happen right away. Eventually unless circumstance changeI will post something back

 

[GrowingHigher]

Been listening to alot of experts in genetics, genetic drift is associated with cloned plants no as much seed. Genetic drift in seed is just plain instability. I'd test those autos, then make your crosses then test the offspring. If u do see numbers drifting away from your goal back cross back into one of your original parents of your CBD strain. If u want to fem I say go for it, There is no proof Feminization does anything to cannabis on a genetic level. Yeah it makes the plant release hormones that cause it to make fem pollen but no one has ever proved on a genetic level Feminization effects the chemotype of the strain its all personal bias. If u look at strains that have been geneticly mapped, a clone that originally came from seed, and a S1 made from that clone will test as the same strain.

I know this is old, but I see this term used wrong all the time in the Cannabis community (especially on podcasts, and especially on the GrowCast).

Genetic drift was used correctly by @hank, and only occurs among populations. It refers to the random changes in allele frequency among a population over the course of multiple generations due to chance, rather than selective force. Small populations are most prone to this.

Definition:
Genetic Drift- variation in the relative frequency of different genotypes in a small population, owing to the chance disappearance of particular genes as individuals die or do not reproduce.

Among Cannabis growers who misuse the term, they are actually trying to refer to clone decay in an asexually propagated, individual plant. This is mostly associated with an accumulation of pathogen load (fungi, bacteria, viruses, & viroids) over time. Actual genetic changes are more rare, but can occur by epigenetic changes in gene regulation or by genetic mutation (both of which can happen, and increase in stressed plants). Sports are unique asexual plants that arose from a somatic mutation in this manner. Such changes in tissue culture are referred to as somaclonal variation. (Regenerant Arabidopsis Lineages Display a Distinct Genome-Wide Spectrum of Mutations Conferring Variant Phenotypes , Environmentally responsive genome-wide accumulation of de novo Arabidopsis thaliana mutations and epimutations).

As far as the ability of high CBD plants to breed true for that single trait, yes they will. If all of your parents are 20:1 CBD:THC ratios or above, the active CBD synthase and inactive THC synthase are locked in those lines.