Caldera based seed sexing

[Spider Crab]

It is about being round and sunken in, like a nice scoop has been taken out, i think?

Some strains have hardly any calderas like this, i have noticed.

I am just interested if this method can be used as a guide rather than a 100% law, which would be unlikely or not possible, for reasons chimera pointed out.

Some plants will herm aswell, after all.

 

[2 Legal Co]

I looked at a few of my 'homemade' seeds. Even with a magnifier I couldn't see enough difference to declare them either way.

Maybe a higher magnification will help.

I'd sure like to be able to predict sex. Keeping to Colo. numbers makes large projects difficult if not impossible.

Looking forward to test results.

 

[g0vnaa]

Interesting experiment.
Anybody got new results to post ?

 

[Space Toker]

Silver Skunk tester seed lineup.

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looks like this could provide a lesson in how to select seeds with this method, but not sure. Looks to me like seeds 3,4,7,8, and maybe 5 &14 (5 seems round enough but is it deep/well formed enough? 14 is deep and well-formed enough but is more oval than round) seem fit your description. But like you say, it is somewhat subjective. 1 seems round but not complete or not deep enough to be a "caldera"; other such "maybe's" are 9 (not deep or complete but round),10(round but deformed/not uniform),13(vaguely round but not deep and uniformly round). #2, 6, 11, & 12 are obvious "no's". So I am unsure of myself. Others who are unsure what to select and what not to select, or pay for their seeds and cannot afford to "discard" them may want to use caution. I probably will be open-minded enough to try this but still be skeptical, and therefore will seperate into 2 or 3 groups and plant them all and record the results (yes's, no's and maybe's). If the results are 70% positive, that will not be of much use to me as I tend to average 2/3 to 70% female anyway. But it is worth documented as described above to find out.

 

[BOMBAYCAT]

Greetings and the results are in. I am a fairly good plant sexer by using preflowers. I had some old Nepalese Jam seeds laying around so I popped them. This variety does not show preflowers well. Anyway:

seed sorted and marked Female didn't pop (old seeds)

seed sorted and marked Female = showed Female preflowers

seed sorted and marked Female = showed 1 Male preflower

seed sorted and marked Male = didn't show preflowers BUT at 4th true node showed branching with the alternate branching structure of a female approaching sexual maturity

Anyway I can try pollen chucking for seeds since this variety has been worked to F6 I think. Hope this helps the project.

 

[Seaf0ur]

positive or negative... any real world testing is appreciated.

 

[foomar]

From what I have observed from sorting large batches of seed , the shape is a function of maturity and the number of seeds in a bud , those reaching full maturity on a less densely seeded bud are rounder and all look like the ones touted as females in the chart.

Graded into two groups the wobbly ones . or cosmetic seconds that I grow out myself , and those that are rounder , as sent in for freebies , are both approaching 50/50 in flowered sex when a statistically valid number of over 500 of one cross have been grown.

As Soma says , I see no mechanism by which the embryo could influence the seed form , which is a shame as it would be a godsend if true.

I don't grow feminised myself , has anyone checked a batch of mature seed to see if this caldera variation is evident in them ?

 

[trichrider]

yes. they all looked round. all germinated female too.

 

[bugman52]

I got a few seeds poped an labled ,we will see.
on another note ,
I was looking at some of my seeds labled RBx?
the mom was Resin Bomb , unknown dad?? this plant was outside with no males.
ALL THE SEEDS LOOK TO BE FEMALE???
I did have GA3 reverted BMW mom it only had 4 or 5 flowers on it???
I used it to make a few seeds but only got 9 seeds, OR DID I??
I got a few of these pop also.

 

[BlueGrassToker]

The genetic map of each individual seed has been drawn up and set. Nothing we can do to change what it has to offer. Soak them in virgins piss and germ them in a mojo bag, it makes no damn difference. Plenty of evidence to support this.

Evolution and species survival is what determines what percentage of seeds will be male, female, and intersex. What a fantastic surviving machine cannabis is.

A control group of 5 or 30 is supposed to show us what?
I think that if you are looking for a scientific study worth anything, you will need to think of at least 3 digit groups. Anything less is nothing but fodder for internet arguments among the less-than-learned.

Delving into genetics a bit, as well as pouring over hundreds of papers written on cannabis genetics will tend to increase our awareness of how things work...really work.

 

[EsterEssence]

Did not work for me, although i didn't choose the seeds based on caldera, i did notice the amount of round to out of round ones. There were way more round ones and I got a shit load of fucking males, CRAP is all i have to say...

 

[Dropped Cat]

Here they are:

View Image

All four popped, results on sex pending.

Well, I got 2 confirmed gals and one boy. One culled
by my cat.

Proves nothing to me, but I enjoyed the suspense.

 

[bugman52]

I got a few seeds poped an labled ,we will see.
on another note ,
I was looking at some of my seeds labled RBx?
the mom was Resin Bomb , unknown dad?? this plant was outside with no males.
ALL THE SEEDS LOOK TO BE FEMALE???
I did have GA3 reverted BMW mom it only had 4 or 5 flowers on it???
I used it to make a few seeds but only got 9 seeds, OR DID I??
I got a few of these pop also.

the seeds all looked to be female.
BUT I got 2 males out of 7 seeds on the RB.
I was 50/50 on another batch of seeds.?
so inconclusive.
O I did try to pick a male from 2 seeds both were female.

 

[Seaf0ur]

At this point, I think enough result has been tallied.

Although this does seem to increase the probability with some strains, it is not reliable enough to be used as a overall guideline.... simply too many inconclusive results. I'll still take a peek, but certainly wont expect set-in-stone results.

I appreciate everyones input.

 

[SeedsOfFreedom]

I was not convinced this would work, BUT I love to see things myself so I had to try it. I started a descent size batch of seeds to start(122) and used half fem and half regular seeds. I was going to photograph it all, but I was a bit busy for that.

First, many of the fem seeds (50 total) had different shapes, and all are females(or intersex!). That seems like enough to discredit this seed sexing idea alone.

Then with the regular seeds(72 total) I marked which had which shape before putted them in soil. After sexing them I can say in my regular male/female sample group there was absolutely no differences in the sex determination based on the seed shape.

Sorry about my lack of documentation or pictures at least, but SOF has lots of more important projects going on that will be documented... for now I say plant all those seeds, this caldera based sexing doesn't seem to work, and male plants aren't that bad anyway!