Btw, I am using Epigenetics in my Marijuana Breeding Program in multiple ways.
1. I let plants die to find the survivors
2. I am using African strains with THCv, which is a result of UVB; meaning it is basically the same exact thing as Melanin (pigment) in human skin. And I am using UVB lights to bring out the THCv.
3. I am using Flavor and Smell Strains.
4. I let leaves touch LED lights and burn, which may activate a response to create stronger, or maybe waxier leaves.
5. I have in the past used a Razor blade to chop a plant in half and let it grow like 2 plants with 1 root system.
6. I top and FIM my plants
7. I supercrop the stalk as it is growing, as well as the branches when they start coming out.
8. I stretch the plants either with just strings tied to the container tied to the tops of the branches to pull them down; or tie them to Bamboo poles.
There is more, but there are a bunch of good examples. And these are things you can do with all plants. There are other things that you could do specifically to get a certain desired trait. For example, many people will baby their plant's pH level, because if it gets too Acidic or Basic it can kill your plants, but if you were to keep growing in Super Acidic or Super Basic Soil, and only bred the ones that survived because the other ones were dead, then you would eventually even up with a strain that can grow in Acidic Soil, and it might even end up making some new Flavors by absorbing Acids.
And the idea of "Absorbing Acids" could add a whole other layer to the Epigenetics of Breeding an Acid Resistant Strain, you could grow a Strain that thrives in only 1 form of Acid, say Mallic Acid, which is what gives Apples their Flavors. And what if it possibly begins to absorb the Mallic Acid and use it to add smell and flavor, the way certain species eat other species for their poison; some eat Sea Urchins, some eat Ants, etc. Just water them with 10% Mallic Acid every time, and keep the survivors, and if too many seem to be surviving, up the %.
And you could also do the same with bugs. There are Ants that live in Acacia Trees; you could start an Ant Farm inside your Marijuana grow containers, and just see what that does over time. You could do the same with Various fungi and plants, for example Wormwood (the Absinthe plant) kills other plants around it, but some plants can grow around it. You could create a strain of Marijuana that can survive in the same container as Wormwood (if it doesn't already), and see if that makes any other genetic changes. Or you could just grow Marijuana with various other plants and find out what happens with each one. Fungus and Bacteria would be good as well.
You could grow Bacteria by getting Petri Dishes and Agar, then getting Cotton Swabs of Dogs, and Cats, and Horses, and Cars, and Buildings, and Fruit, etc etc etc. And then find a good place to identify Bacteria online, or find a good book. Then isolate ones that you can identify that are not dangerous, and let them fill up a Petri dish with Agar of their own; then add them to your Marijuana soil.
You could also try to get your plants to catch diseases, and then keep the survivors. There were a breed of Cow that was different from the parent Breed genetically, but only because it had gotten a virus. Ebola and the Plague both put markers on DNA, as well as HIV and AIDS, there is an entire tribe in Africa with HIV but none of them ever get AIDS, because everyone that could get it did, and died.
There are also various plant steroids that could be applied, as well as Silicate and its activator. But Silicate and the Activator should be used along with other factors.
And you could even mix tons of these together. These are all just various Breeding Possibilities that are not being considered by almost anyone in the Marijuana Industry right now.