Collodial silver genetics question
- Thread starter Slime92
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princegoon
Member
Bump. I'm curious too. I hit a frosty Chernobyl pheno with some feminized pollen from a frosty Blue Dream girl.
EverythingsHazy
Well-Known Member
All colloidal/ionic silver spray does to Cannabis, in regards to breeding, is make a female plant produce pollen sacs that only contain female pollen. The seeds are the same as regular seeds, aside from the fact that there are no male seeds.
princegoon
Member
But it makes sense to be curious about the genetics. I was curious too, in how feminized, selfed, genetics combine. So are all the pollen grains identical genetics and what diversity in offspring will we see when a plant's own DNA combines with itself? Ive done this procedure a few times, but have yet to grow out enough of those progeny to know the answer.
princegoon
Member
More than likely, I'm asking the wrong questions lol. I look forward to being educated
EverythingsHazy
Well-Known Member
They are all good questions, and there is lots of misinformation out there on the topic.
The pollen grains are not all the same. They all have unique genetic information that they pass onto the egg cells that they pollinate.
The reason they are all female, is that a female plant only has X chromosomes (XX), and a male plant has both X and Y chromosomes (XY) Both, pollen grains and egg cells contain only one of those sex chromosomes, provided by the parent. Egg cells, coming from female plants, can only contain an X chromosome. Pollen grains, coming from male plants, can have either an X or a Y chromosome.
When pollen fertilizes an egg cell, the two sex chromosomes combine, which determines the sex of the embryo that is inside of the seed.
When you use CS to make a female plant produce pollen, the plant can only provide X chromosomes to its pollen grains, so when they pair with the X chromosomes in the egg cells of a female plant, they always for XX pairs, or female seeds.
princegoon
Member
I know the seeds are female, I understand how all that works. I was commenting that it made sense to be curious about genetic DIVERSITY wgen a plant is fertilizing itself.
princegoon
Member
Not trying to be rude, but a lot of the responses i see here dont even really the comments they are responding too.
EverythingsHazy
Well-Known Member
You asked if the pollen was identical. I answered you and explained how it's the same as regular pollen, aside from every grain having the X chromosome.
The rules of genetics still apply. If you self a plant that is Gg (G = green / g = red), the pollen it creates can carry the G or g.
princegoon
Member
Thank you, that makes perfect sense.
ANC
Well-Known Member
That would be beyond the scope of what you could likely learn here. it does not simply matter of what genes you inherit but which of those genes are dominant in many cases.
That is why you will have such a wide pheno spread in the first generation. If you took the plants that you could identify as autos and breed them again, a much larger percentage will show the auto trait. You can't really back cross with autos as you can't keep mother or father plants alive(as far as I now). But you can still lock in traits using breeding with subsequent generations. They can also now do predictive testing on young plants for things like potency and sex, saving them time on working with the wrong seedlings when you have a large base to select from.
That is why you will have such a wide pheno spread in the first generation. If you took the plants that you could identify as autos and breed them again, a much larger percentage will show the auto trait. You can't really back cross with autos as you can't keep mother or father plants alive(as far as I now). But you can still lock in traits using breeding with subsequent generations. They can also now do predictive testing on young plants for things like potency and sex, saving them time on working with the wrong seedlings when you have a large base to select from.
Abiqua
Well-Known Member
Gynoecious
Abiqua
Well-Known Member
Right, gynoecious.
EverythingsHazy
Well-Known Member
I'm not sure if they would be considered gynoecious, because the changes aren't caused by genetics, but rather by the silver affecting the levels of certain substances within the plant. CS also doesn't cause plants to produce typical female flowers (sprayed plants don't start to make calyxes instead of pollen sacs). They produce flowers with the traditional male structure, but pollen grains that only have X chromosomes. Lastly, cucumbers, which seem to be a prominent example of gynoecious plants, produce both male and female flowers on every plant.
Abiqua
Well-Known Member
cucumbers are triploids which are seedless. They breed to a doubled haploid 4n x 2n = 3n. They are functionally sterile, so sex isn't involved in terms of needing a male or female, they took that part out, intentionally.
I am not sure why you don't think it gynoecious. You keep describing it to a T academically. What kind of flowers are being produced? CS is only tweaking a hormone to challenge the x/y system....
I am not sure why you don't think it gynoecious. You keep describing it to a T academically. What kind of flowers are being produced? CS is only tweaking a hormone to challenge the x/y system....