Testing vegetative plants for thc/cbd ratio to see which seed is best phenotype

[beachtown77]

I have recently had sprouted a dozen seeds of various strains. One of them was Cannatonic which has potential of being high CBD. So I ended up getting all my female plants tested for THC/CBD ratio percentages. So far I am seeing similar and major differences in THC levels in my plants. I am curious if anyone else has been doing this and what there outcomes have been. For example I have 3 female Ghost Train Haze plants that have been tested plant 1 is 3.85% thc! plant 2 is 2.65% and the 3rd is 2.35%. I am going to flower clones from all of them to see which one is the strongest phenotype and see If the test really work. I want some feedback from people


Thanks!

 

[sanvanalona]

How are you testing these? A gc machine?

 

[beachtown77]

Cannasafe Analytics is the company in Riverside Ca. Testing them for me. Don't quote me but I think it is the same way that they test buds for thc levels. My plants are only 10 weeks old give or take.

 

[Seamaiden]

Interesting. I never thought about having young plants tested. What's it costing you to do this?

 

[beachtown77]

I pay $30 per test. These test are usually good to find out high CBD plants. I sprouted 3 Cannatonic seeds and had all 3 plants tested and this test told me what plant had the highest CBD/THC ratio. Supposedly the ratio should stay the same throughout the lifetime of the plant but just get higher the older the plant gets. Out of my 3 Cannatonic plants it showed me that I do have a plant high in CBD the ratio was THC 1.05% -CBD 2.14% which is close to a 2:1 ratio. In turn I don't have to waste my time flowering all three strains to find my high CBD plant. I hope this same test will prove the same for the best THC phenotype or highest THC phenotype. This could save growers huge amounts of time and money. I will post a picture of the test.

 

[beachtown77]

 

[beachtown77]

View attachment 397948

 

[Seamaiden]

That's very helpful! You, dear farmer, have planted a seed.

 

[Blinky]

Cool story, thanks for sharing!!!
I hope you are able to test the plants again during flower to see how the ratios change, and hopefully you will have the time to share your findings.

 

[thunderfudge]

Isn't it just cbd you can accurately test in veg since the thc comes later via resin production?

 

[toquer]

In changing testing companies!! I got 4 samples for this week.

 

[beachtown77]

Yes Thunderfudge, but you can test each seedling of the same strain to see which one has the highest thc. In turn I hope this tells me which is the keeper or strongest pheno. Just taking educated guess and hope it turns true. I will let you guys know.

 

[north knect]

hwy there @beachtown77 so any updates on your results as to wether the test in veg actually carry through with the same cbd/thc ratios in the finnished meds?

 

[Kitty]

Never heard of anyone testing vegetative plants before! Interesting..

So cheap too. $30 is a very very reasonable price. Will you test the plants again at harvest? I would like to know if high THC/CBD ratio % in vegetative plants means high % at harvest. It may not..

 

[suomynona]

http://geo.cbs.umn.edu/CannabisDNA.html

 

[jessejames12345]

would be neat too see the same plants tested after a full cycle to see if the ratio's are the same

Awesome !


EDIT - @Blinky , we both had the same Idea , so double post : P

 

[north knect]

this thread has been dead since may lol..i was intrested too And figured his his would b done and tested by now..hopfully he replys to his own thread lol

 

[Purpz]

Damn it I hate when old threads trick you!

 

[wobbly goblin]

i ran some zdt from @symbiote420 through my gc at 6 weeks from seed..(leaf tissue)
3 females and one male showed promise with higher cbd then thc ratio's..
i let all the females pollinate with the cbd dominate male for some test beans..
i ran left over seed calyx's from all the females and the same three showed 3 parts thc to 4 parts cbd..
now have some off spring from the cbd dominate male and one of the cbd dominate females to see if these may breed true
hope so

fwiw

 

[beachtown77]

Sorry for the delay but have been busy. I don't have updates yet but will have in 3 weeks on the canna tonic CBD content. I won't have results on the others because the phenotypes weren't worth keeping. I flowered out the strains but even the plant with the highest ratio of THC wasn't in my opinion a keeper phenotype. So I don't want to waste money. Even if the test proved true to THC ratio it still didn't give me the results I was looking for. I wanted to see if I could pick out the best phenotype by highest THC ratio. It obviously didn't work. I am however finishing with the Cannatonic and will see if the CBD ratio stays true. FYI Archive seeds are by far the best genetics I have worked with from seed. The Docta's seeds that popped out female were all keeper phenotypes with slight variances that made it tough to decide which ones to keep. I Tip my hat to him for top notch breeding. Face Off, Race Fuel, Hell Raiser, Valley Girl all top notch. I wish I had all his strains. Also I wish I did the same testing with his seeds as it would have been a true test that I would have been looking for as they all came out so close to each other with not one being garbage! I wish I could say the same for Rare Dankness. I spent hundreds on his seeds and not one keeper. I did get hermies though, what a waste of time. Sorry for the rant everybody will post results in a few weeks!